- Linux-stable-mirror - lists.linaro.org

[PATCH AUTOSEL 6.16-6.6] apparmor: shift ouid when mediating hard links in userns

by Sasha Levin

From: Gabriel Totev <gabriel.totev(a)zetier.com> [ Upstream commit c5bf96d20fd787e4909b755de4705d52f3458836 ] When using AppArmor profiles inside an unprivileged container, the link operation observes an unshifted ouid. (tested with LXD and Incus) For example, root inside container and uid 1000000 outside, with `owner /root/link l,` profile entry for ln: /root$ touch chain && ln chain link ==> dmesg apparmor="DENIED" operation="link" class="file" namespace="root//lxd-feet_<var-snap-lxd-common-lxd>" profile="linkit" name="/root/link" pid=1655 comm="ln" requested_mask="l" denied_mask="l" fsuid=1000000 ouid=0 [<== should be 1000000] target="/root/chain" Fix by mapping inode uid of old_dentry in aa_path_link() rather than using it directly, similarly to how it's mapped in __file_path_perm() later in the file. Signed-off-by: Gabriel Totev <gabriel.totev(a)zetier.com> Signed-off-by: John Johansen <john.johansen(a)canonical.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- LLM Generated explanations, may be completely bogus: **Backport Status: YES** This commit should be backported to stable kernel trees for the following reasons: 1. **Clear Bug Fix**: This fixes a real bug where AppArmor incorrectly reports the unshifted uid when mediating hard link operations inside user namespaces/containers. The commit message provides a concrete example showing ouid=0 instead of the expected ouid=1000000 in container logs. 2. **Security Impact**: This is a security-relevant bug that causes AppArmor policy enforcement to behave incorrectly in containerized environments. The owner-based AppArmor rules (like `owner /root/link l,`) won't work correctly because the uid comparison is done with the wrong (unshifted) value. 3. **Minimal and Contained Fix**: The change is small and surgical - it only modifies the aa_path_link() function to properly map the inode uid through the mount's idmapping, following the exact same pattern already used in __file_path_perm(): - Uses `i_uid_into_vfsuid(mnt_idmap(target.mnt), inode)` to get the vfsuid - Converts it back with `vfsuid_into_kuid(vfsuid)` for the path_cond structure 4. **No New Features or Architecture Changes**: This is purely a bug fix that makes aa_path_link() consistent with how __file_path_perm() already handles uid mapping. No new functionality is added. 5. **Container/User Namespace Compatibility**: With the widespread use of containers (LXD, Incus, Docker with userns), this bug affects many production systems. The fix ensures AppArmor policies work correctly in these environments. 6. **Low Risk**: The change follows an established pattern in the codebase (from __file_path_perm) and only affects the specific case of hard link permission checks in user namespaces. The risk of regression is minimal. 7. **Clear Testing**: The commit message indicates this was tested with LXD and Incus containers, showing the issue is reproducible and the fix validated. The code change is straightforward - replacing direct access to `d_backing_inode(old_dentry)->i_uid` with proper idmapping-aware conversion that respects user namespace uid shifts. This makes aa_path_link() consistent with other AppArmor file operations that already handle idmapped mounts correctly. security/apparmor/file.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/security/apparmor/file.c b/security/apparmor/file.c index d52a5b14dad4..62bc46e03758 100644 --- a/security/apparmor/file.c +++ b/security/apparmor/file.c @@ -423,9 +423,11 @@ int aa_path_link(const struct cred *subj_cred, { struct path link = { .mnt = new_dir->mnt, .dentry = new_dentry }; struct path target = { .mnt = new_dir->mnt, .dentry = old_dentry }; + struct inode *inode = d_backing_inode(old_dentry); + vfsuid_t vfsuid = i_uid_into_vfsuid(mnt_idmap(target.mnt), inode); struct path_cond cond = { - d_backing_inode(old_dentry)->i_uid, - d_backing_inode(old_dentry)->i_mode + .uid = vfsuid_into_kuid(vfsuid), + .mode = inode->i_mode, }; char *buffer = NULL, *buffer2 = NULL; struct aa_profile *profile; -- 2.39.5

1 month

3
17
0 0

[PATCH] soc: qcom: icc-bwmon: Fix handling dev_pm_opp_find_bw_*() errors

by Krzysztof Kozlowski

The ISR calls dev_pm_opp_find_bw_ceil(), which can return EINVAL, ERANGE or ENODEV, and if that one fails with ERANGE, then it tries again with floor dev_pm_opp_find_bw_floor(). Code misses error checks for two cases: 1. First dev_pm_opp_find_bw_ceil() failed with error different than ERANGE, 2. Any error from second dev_pm_opp_find_bw_floor(). In an unlikely case these error happened, the code would further dereference the ERR pointer. Close that possibility and make the code more obvious that all errors are correctly handled. Reported by Smatch: icc-bwmon.c:693 bwmon_intr_thread() error: 'target_opp' dereferencing possible ERR_PTR() Fixes: b9c2ae6cac40 ("soc: qcom: icc-bwmon: Add bandwidth monitoring driver") Cc: <stable(a)vger.kernel.org> Reported-by: Dan Carpenter <dan.carpenter(a)linaro.org> Closes: https://lore.kernel.org/r/aJTNEQsRFjrFknG9@stanley.mountain/ Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski(a)linaro.org> --- Some unreleased smatch, though, because I cannot reproduce the warning, but I imagine Dan keeps the tastiests reports for later. :) --- drivers/soc/qcom/icc-bwmon.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/soc/qcom/icc-bwmon.c b/drivers/soc/qcom/icc-bwmon.c index 3dfa448bf8cf..597f9025e422 100644 --- a/drivers/soc/qcom/icc-bwmon.c +++ b/drivers/soc/qcom/icc-bwmon.c @@ -656,6 +656,9 @@ static irqreturn_t bwmon_intr_thread(int irq, void *dev_id) if (IS_ERR(target_opp) && PTR_ERR(target_opp) == -ERANGE) target_opp = dev_pm_opp_find_bw_floor(bwmon->dev, &bw_kbps, 0); + if (IS_ERR(target_opp)) + return IRQ_HANDLED; + bwmon->target_kbps = bw_kbps; bw_kbps--; -- 2.48.1

1 month

3
5
0 0

[PATCH 6.1.y] tls: separate no-async decryption request handling from async

by William Liu

From: Sabrina Dubroca <sd(a)queasysnail.net> [ Upstream commit 41532b785e9d79636b3815a64ddf6a096647d011 ] If we're not doing async, the handling is much simpler. There's no reference counting, we just need to wait for the completion to wake us up and return its result. We should preferably also use a separate crypto_wait. I'm not seeing a UAF as I did in the past, I think aec7961 ("tls: fix race between async notify and socket close") took care of it. This will make the next fix easier. Signed-off-by: Sabrina Dubroca <sd(a)queasysnail.net> Link: https://lore.kernel.org/r/47bde5f649707610eaef9f0d679519966fc31061.17091326… Signed-off-by: Jakub Kicinski <kuba(a)kernel.org> [ William: The original patch did not apply cleanly due to deletions of non-existent lines in 6.1.y. The UAF the author stopped seeing can still be reproduced on systems without AVX in conjunction with cryptd. Also removed an extraneous statement after a return statement that is adjacent to diff. ] Link: https://lore.kernel.org/netdev/he2K1yz_u7bZ-CnYcTSQ4OxuLuHZXN6xZRgp6_ICSWnq… Signed-off-by: William Liu <will(a)willsroot.io> --- Tested with original repro and all tests in selftests/net/tls.c --- net/tls/tls_sw.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c index 6ac3dcbe87b5..e1e3207168e3 100644 --- a/net/tls/tls_sw.c +++ b/net/tls/tls_sw.c @@ -274,9 +274,15 @@ static int tls_do_decryption(struct sock *sk, DEBUG_NET_WARN_ON_ONCE(atomic_read(&ctx->decrypt_pending) < 1); atomic_inc(&ctx->decrypt_pending); } else { + DECLARE_CRYPTO_WAIT(wait); + aead_request_set_callback(aead_req, CRYPTO_TFM_REQ_MAY_BACKLOG, - crypto_req_done, &ctx->async_wait); + crypto_req_done, &wait); + ret = crypto_aead_decrypt(aead_req); + if (ret == -EINPROGRESS || ret == -EBUSY) + ret = crypto_wait_req(ret, &wait); + return ret; } ret = crypto_aead_decrypt(aead_req); @@ -289,7 +295,6 @@ static int tls_do_decryption(struct sock *sk, /* all completions have run, we're not doing async anymore */ darg->async = false; return ret; - ret = ret ?: -EINPROGRESS; } atomic_dec(&ctx->decrypt_pending); -- 2.43.0

1 month

1
0
0 0

[PATCH 6.12] mfd: cros_ec: Separate charge-control probing from USB-PD

by linux＠weissschuh.net

From: Thomas Weißschuh <linux(a)weissschuh.net> [ Upstream commit e40fc1160d491c3bcaf8e940ae0dde0a7c5e8e14 ] The charge-control subsystem in the ChromeOS EC is not strictly tied to its USB-PD subsystem. Since commit 7613bc0d116a ("mfd: cros_ec: Don't load charger with UCSI") the presence of EC_FEATURE_UCSI_PPM would inhibit the probing of the charge-control driver. Furthermore recent versions of the EC firmware in Framework laptops hard-disable EC_FEATURE_USB_PD to avoid probing cros-usbpd-charger, which then also breaks cros-charge-control. Instead use the dedicated EC_FEATURE_CHARGER. Cc: stable(a)vger.kernel.org Link: https://github.com/FrameworkComputer/EmbeddedController/commit/1d7bcf1d5013… Fixes: 555b5fcdb844 ("mfd: cros_ec: Register charge control subdevice") Signed-off-by: Thomas Weißschuh <linux(a)weissschuh.net> Reviewed-by: Tzung-Bi Shih <tzungbi(a)kernel.org> Tested-by: Tom Vincent <linux(a)tlvince.com> Link: https://lore.kernel.org/r/20250521-cros-ec-mfd-chctl-probe-v1-1-6ebfe3a6efa… Signed-off-by: Lee Jones <lee(a)kernel.org> --- drivers/mfd/cros_ec_dev.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/mfd/cros_ec_dev.c b/drivers/mfd/cros_ec_dev.c index f3dc812b359f..78c48dc624e8 100644 --- a/drivers/mfd/cros_ec_dev.c +++ b/drivers/mfd/cros_ec_dev.c @@ -87,7 +87,6 @@ static const struct mfd_cell cros_ec_sensorhub_cells[] = { }; static const struct mfd_cell cros_usbpd_charger_cells[] = { - { .name = "cros-charge-control", }, { .name = "cros-usbpd-charger", }, { .name = "cros-usbpd-logger", }, }; @@ -108,6 +107,10 @@ static const struct mfd_cell cros_ec_keyboard_leds_cells[] = { { .name = "cros-keyboard-leds", }, }; +static const struct mfd_cell cros_ec_charge_control_cells[] = { + { .name = "cros-charge-control", }, +}; + static const struct cros_feature_to_cells cros_subdevices[] = { { .id = EC_FEATURE_CEC, @@ -144,6 +147,11 @@ static const struct cros_feature_to_cells cros_subdevices[] = { .mfd_cells = cros_ec_keyboard_leds_cells, .num_cells = ARRAY_SIZE(cros_ec_keyboard_leds_cells), }, + { + .id = EC_FEATURE_CHARGER, + .mfd_cells = cros_ec_charge_control_cells, + .num_cells = ARRAY_SIZE(cros_ec_charge_control_cells), + }, }; static const struct mfd_cell cros_ec_platform_cells[] = { -- 2.50.1

1 month

1
0
0 0

+ mm-memory-failure-fix-infinite-uce-for-vm_pfnmap-pfn.patch added to mm-hotfixes-unstable branch

by Andrew Morton

The patch titled Subject: mm/memory-failure: fix infinite UCE for VM_PFNMAP pfn has been added to the -mm mm-hotfixes-unstable branch. Its filename is mm-memory-failure-fix-infinite-uce-for-vm_pfnmap-pfn.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patche… This patch will later appear in the mm-hotfixes-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: Jinjiang Tu <tujinjiang(a)huawei.com> Subject: mm/memory-failure: fix infinite UCE for VM_PFNMAP pfn Date: Fri, 15 Aug 2025 15:32:09 +0800 When memory_failure() is called for a already hwpoisoned pfn, kill_accessing_process() will be called to kill current task. However, if the vma of the accessing vaddr is VM_PFNMAP, walk_page_range() will skip the vma in walk_page_test() and return 0. Before commit aaf99ac2ceb7 ("mm/hwpoison: do not send SIGBUS to processes with recovered clean pages"), kill_accessing_process() will return EFAULT. For x86, the current task will be killed in kill_me_maybe(). However, after this commit, kill_accessing_process() simplies return 0, that means UCE is handled properly, but it doesn't actually. In such case, the user task will trigger UCE infinitely. To fix it, add .test_walk callback for hwpoison_walk_ops to scan all vmas. Link: https://lkml.kernel.org/r/20250815073209.1984582-1-tujinjiang@huawei.com Fixes: aaf99ac2ceb7 ("mm/hwpoison: do not send SIGBUS to processes with recovered clean pages") Signed-off-by: Jinjiang Tu <tujinjiang(a)huawei.com> Acked-by: David Hildenbrand <david(a)redhat.com> Acked-by: Miaohe Lin <linmiaohe(a)huawei.com> Reviewed-by: Jane Chu <jane.chu(a)oracle.com> Cc: Kefeng Wang <wangkefeng.wang(a)huawei.com> Cc: Naoya Horiguchi <nao.horiguchi(a)gmail.com> Cc: Oscar Salvador <osalvador(a)suse.de> Cc: Shuai Xue <xueshuai(a)linux.alibaba.com> Cc: Zi Yan <ziy(a)nvidia.com> Cc: <stable(a)vger.kernel.org> Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> --- mm/memory-failure.c | 8 ++++++++ 1 file changed, 8 insertions(+) --- a/mm/memory-failure.c~mm-memory-failure-fix-infinite-uce-for-vm_pfnmap-pfn +++ a/mm/memory-failure.c @@ -853,9 +853,17 @@ static int hwpoison_hugetlb_range(pte_t #define hwpoison_hugetlb_range NULL #endif +static int hwpoison_test_walk(unsigned long start, unsigned long end, + struct mm_walk *walk) +{ + /* We also want to consider pages mapped into VM_PFNMAP. */ + return 0; +} + static const struct mm_walk_ops hwpoison_walk_ops = { .pmd_entry = hwpoison_pte_range, .hugetlb_entry = hwpoison_hugetlb_range, + .test_walk = hwpoison_test_walk, .walk_lock = PGWALK_RDLOCK, }; _ Patches currently in -mm which might be from tujinjiang(a)huawei.com are mm-memory-failure-fix-infinite-uce-for-vm_pfnmap-pfn.patch mm-memory_hotplug-fix-hwpoisoned-large-folio-handling-in-do_migrate_range.patch

1 month

1
0
0 0

+ init-handle-bootloader-identifier-in-kernel-parameters-v4.patch added to mm-nonmm-unstable branch

by Andrew Morton

The patch titled Subject: init-handle-bootloader-identifier-in-kernel-parameters-v4 has been added to the -mm mm-nonmm-unstable branch. Its filename is init-handle-bootloader-identifier-in-kernel-parameters-v4.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patche… This patch will later appear in the mm-nonmm-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: Huacai Chen <chenhuacai(a)loongson.cn> Subject: init-handle-bootloader-identifier-in-kernel-parameters-v4 Date: Fri, 15 Aug 2025 17:01:20 +0800 use strstarts() Link: https://lkml.kernel.org/r/20250815090120.1569947-1-chenhuacai@loongson.cn Signed-off-by: Huacai Chen <chenhuacai(a)loongson.cn> Cc: Al Viro <viro(a)zeniv.linux.org.uk> Cc: Christian Brauner <brauner(a)kernel.org> Cc: Jan Kara <jack(a)suse.cz> Cc: <stable(a)vger.kernel.org> Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> --- init/main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/init/main.c~init-handle-bootloader-identifier-in-kernel-parameters-v4 +++ a/init/main.c @@ -559,7 +559,7 @@ static int __init unknown_bootoption(cha /* Handle bootloader identifier */ for (int i = 0; bootloader[i]; i++) { - if (!strncmp(param, bootloader[i], strlen(bootloader[i]))) + if (strstarts(param, bootloader[i])) return 0; } _ Patches currently in -mm which might be from chenhuacai(a)loongson.cn are init-handle-bootloader-identifier-in-kernel-parameters.patch init-handle-bootloader-identifier-in-kernel-parameters-v4.patch

1 month

1
0
0 0

[PATCH v5 RESEND] x86/cpu/intel: Fix the constant_tsc model check for Pentium 4

by Suchit Karunakaran

Pentium 4's which are INTEL_P4_PRESCOTT (model 0x03) and later have a constant TSC. This was correctly captured until commit fadb6f569b10 ("x86/cpu/intel: Limit the non-architectural constant_tsc model checks"). In that commit, an error was introduced while selecting the last P4 model (0x06) as the upper bound. Model 0x06 was transposed to INTEL_P4_WILLAMETTE, which is just plain wrong. That was presumably a simple typo, probably just copying and pasting the wrong P4 model. Fix the constant TSC logic to cover all later P4 models. End at INTEL_P4_CEDARMILL which accurately corresponds to the last P4 model. Fixes: fadb6f569b10 ("x86/cpu/intel: Limit the non-architectural constant_tsc model checks") Cc: <stable(a)vger.kernel.org> # v6.15 Reviewed-by: Sohil Mehta <sohil.mehta(a)intel.com> Signed-off-by: Suchit Karunakaran <suchitkarunakaran(a)gmail.com> --- Changes since v4: - Updated the patch based on review suggestions Changes since v3: - Refined changelog Changes since v2: - Improved commit message Changes since v1: - Fixed incorrect logic arch/x86/kernel/cpu/intel.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c index 076eaa41b8c8..98ae4c37c93e 100644 --- a/arch/x86/kernel/cpu/intel.c +++ b/arch/x86/kernel/cpu/intel.c @@ -262,7 +262,7 @@ static void early_init_intel(struct cpuinfo_x86 *c) if (c->x86_power & (1 << 8)) { set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC); set_cpu_cap(c, X86_FEATURE_NONSTOP_TSC); - } else if ((c->x86_vfm >= INTEL_P4_PRESCOTT && c->x86_vfm <= INTEL_P4_WILLAMETTE) || + } else if ((c->x86_vfm >= INTEL_P4_PRESCOTT && c->x86_vfm <= INTEL_P4_CEDARMILL) || (c->x86_vfm >= INTEL_CORE_YONAH && c->x86_vfm <= INTEL_IVYBRIDGE)) { set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC); } -- 2.50.1

1 month

1
0
0 0

[BACKPORT REQUEST] mfd: cros_ec: Separate charge-control probing from USB-PD

by Thomas Weißschuh

Dear stable team, I'd like to have the following commit backported to v6.16 and v6.15: e40fc1160d49 ("mfd: cros_ec: Separate charge-control probing from USB-PD") It fixes probing issues for the cros-charge-control driver, for details see the commit message. As far as I can see, the commit also was marked for -stable backporting from the beginning. Somehow this doesn't seem to have worked. Thanks for your consideration, Thomas

1 month

2
1
0 0

FAILED: patch "[PATCH] PCI/ACPI: Fix runtime PM ref imbalance on Hot-Plug Capable" failed to apply to 6.6-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.6-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y git checkout FETCH_HEAD git cherry-pick -x 6cff20ce3b92ffbf2fc5eb9e5a030b3672aa414a # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025081509-uncrown-janitor-adad@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 6cff20ce3b92ffbf2fc5eb9e5a030b3672aa414a Mon Sep 17 00:00:00 2001 From: Lukas Wunner <lukas(a)wunner.de> Date: Sun, 13 Jul 2025 16:31:01 +0200 Subject: [PATCH] PCI/ACPI: Fix runtime PM ref imbalance on Hot-Plug Capable ports pci_bridge_d3_possible() is called from both pcie_portdrv_probe() and pcie_portdrv_remove() to determine whether runtime power management shall be enabled (on probe) or disabled (on remove) on a PCIe port. The underlying assumption is that pci_bridge_d3_possible() always returns the same value, else a runtime PM reference imbalance would occur. That assumption is not given if the PCIe port is inaccessible on remove due to hot-unplug: pci_bridge_d3_possible() calls pciehp_is_native(), which accesses Config Space to determine whether the port is Hot-Plug Capable. An inaccessible port returns "all ones", which is converted to "all zeroes" by pcie_capability_read_dword(). Hence the port no longer seems Hot-Plug Capable on remove even though it was on probe. The resulting runtime PM ref imbalance causes warning messages such as: pcieport 0000:02:04.0: Runtime PM usage count underflow! Avoid the Config Space access (and thus the runtime PM ref imbalance) by caching the Hot-Plug Capable bit in struct pci_dev. The struct already contains an "is_hotplug_bridge" flag, which however is not only set on Hot-Plug Capable PCIe ports, but also Conventional PCI Hot-Plug bridges and ACPI slots. The flag identifies bridges which are allocated additional MMIO and bus number resources to allow for hierarchy expansion. The kernel is somewhat sloppily using "is_hotplug_bridge" in a number of places to identify Hot-Plug Capable PCIe ports, even though the flag encompasses other devices. Subsequent commits replace these occurrences with the new flag to clearly delineate Hot-Plug Capable PCIe ports from other kinds of hotplug bridges. Document the existing "is_hotplug_bridge" and the new "is_pciehp" flag and document the (non-obvious) requirement that pci_bridge_d3_possible() always returns the same value across the entire lifetime of a bridge, including its hot-removal. Fixes: 5352a44a561d ("PCI: pciehp: Make pciehp_is_native() stricter") Reported-by: Laurent Bigonville <bigon(a)bigon.be> Closes: https://bugzilla.kernel.org/show_bug.cgi?id=220216 Reported-by: Mario Limonciello <mario.limonciello(a)amd.com> Closes: https://lore.kernel.org/r/20250609020223.269407-3-superm1@kernel.org/ Link: https://lore.kernel.org/all/20250620025535.3425049-3-superm1@kernel.org/T/#u Signed-off-by: Lukas Wunner <lukas(a)wunner.de> Signed-off-by: Bjorn Helgaas <bhelgaas(a)google.com> Acked-by: Rafael J. Wysocki <rafael(a)kernel.org> Cc: stable(a)vger.kernel.org # v4.18+ Link: https://patch.msgid.link/fe5dcc3b2e62ee1df7905d746bde161eb1b3291c.175239010… diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c index b78e0e417324..efe478e5073e 100644 --- a/drivers/pci/pci-acpi.c +++ b/drivers/pci/pci-acpi.c @@ -816,13 +816,11 @@ int pci_acpi_program_hp_params(struct pci_dev *dev) bool pciehp_is_native(struct pci_dev *bridge) { const struct pci_host_bridge *host; - u32 slot_cap; if (!IS_ENABLED(CONFIG_HOTPLUG_PCI_PCIE)) return false; - pcie_capability_read_dword(bridge, PCI_EXP_SLTCAP, &slot_cap); - if (!(slot_cap & PCI_EXP_SLTCAP_HPC)) + if (!bridge->is_pciehp) return false; if (pcie_ports_native) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index e9448d55113b..23d8fe98ddf9 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -3030,8 +3030,12 @@ static const struct dmi_system_id bridge_d3_blacklist[] = { * pci_bridge_d3_possible - Is it possible to put the bridge into D3 * @bridge: Bridge to check * - * This function checks if it is possible to move the bridge to D3. * Currently we only allow D3 for some PCIe ports and for Thunderbolt. + * + * Return: Whether it is possible to move the bridge to D3. + * + * The return value is guaranteed to be constant across the entire lifetime + * of the bridge, including its hot-removal. */ bool pci_bridge_d3_possible(struct pci_dev *bridge) { diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 4b8693ec9e4c..cf50be63bf5f 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1678,7 +1678,7 @@ void set_pcie_hotplug_bridge(struct pci_dev *pdev) pcie_capability_read_dword(pdev, PCI_EXP_SLTCAP, &reg32); if (reg32 & PCI_EXP_SLTCAP_HPC) - pdev->is_hotplug_bridge = 1; + pdev->is_hotplug_bridge = pdev->is_pciehp = 1; } static void set_pcie_thunderbolt(struct pci_dev *dev) diff --git a/include/linux/pci.h b/include/linux/pci.h index 05e68f35f392..d56d0dd80afb 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -328,6 +328,11 @@ struct rcec_ea; * determined (e.g., for Root Complex Integrated * Endpoints without the relevant Capability * Registers). + * @is_hotplug_bridge: Hotplug bridge of any kind (e.g. PCIe Hot-Plug Capable, + * Conventional PCI Hot-Plug, ACPI slot). + * Such bridges are allocated additional MMIO and bus + * number resources to allow for hierarchy expansion. + * @is_pciehp: PCIe Hot-Plug Capable bridge. */ struct pci_dev { struct list_head bus_list; /* Node in per-bus list */ @@ -451,6 +456,7 @@ struct pci_dev { unsigned int is_physfn:1; unsigned int is_virtfn:1; unsigned int is_hotplug_bridge:1; + unsigned int is_pciehp:1; unsigned int shpc_managed:1; /* SHPC owned by shpchp */ unsigned int is_thunderbolt:1; /* Thunderbolt controller */ /*

1 month

2
1
0 0

FAILED: patch "[PATCH] block: Make REQ_OP_ZONE_FINISH a write operation" failed to apply to 6.1-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.1-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y git checkout FETCH_HEAD git cherry-pick -x 3f66ccbaaef3a0c5bd844eab04e3207b4061c546 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025081543-myself-easiest-be00@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 3f66ccbaaef3a0c5bd844eab04e3207b4061c546 Mon Sep 17 00:00:00 2001 From: Damien Le Moal <dlemoal(a)kernel.org> Date: Wed, 25 Jun 2025 18:33:23 +0900 Subject: [PATCH] block: Make REQ_OP_ZONE_FINISH a write operation REQ_OP_ZONE_FINISH is defined as "12", which makes op_is_write(REQ_OP_ZONE_FINISH) return false, despite the fact that a zone finish operation is an operation that modifies a zone (transition it to full) and so should be considered as a write operation (albeit one that does not transfer any data to the device). Fix this by redefining REQ_OP_ZONE_FINISH to be an odd number (13), and redefine REQ_OP_ZONE_RESET and REQ_OP_ZONE_RESET_ALL using sequential odd numbers from that new value. Fixes: 6c1b1da58f8c ("block: add zone open, close and finish operations") Cc: stable(a)vger.kernel.org Signed-off-by: Damien Le Moal <dlemoal(a)kernel.org> Reviewed-by: Bart Van Assche <bvanassche(a)acm.org> Reviewed-by: Johannes Thumshirn <johannes.thumshirn(a)wdc.com> Reviewed-by: Christoph Hellwig <hch(a)lst.de> Link: https://lore.kernel.org/r/20250625093327.548866-2-dlemoal@kernel.org Signed-off-by: Jens Axboe <axboe(a)kernel.dk> diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h index 3d1577f07c1c..930daff207df 100644 --- a/include/linux/blk_types.h +++ b/include/linux/blk_types.h @@ -350,11 +350,11 @@ enum req_op { /* Close a zone */ REQ_OP_ZONE_CLOSE = (__force blk_opf_t)11, /* Transition a zone to full */ - REQ_OP_ZONE_FINISH = (__force blk_opf_t)12, + REQ_OP_ZONE_FINISH = (__force blk_opf_t)13, /* reset a zone write pointer */ - REQ_OP_ZONE_RESET = (__force blk_opf_t)13, + REQ_OP_ZONE_RESET = (__force blk_opf_t)15, /* reset all the zone present on the device */ - REQ_OP_ZONE_RESET_ALL = (__force blk_opf_t)15, + REQ_OP_ZONE_RESET_ALL = (__force blk_opf_t)17, /* Driver private requests */ REQ_OP_DRV_IN = (__force blk_opf_t)34,

1 month

2
2
0 0

[STATUS] stable/linux-6.6.y - bb9c90ab9c5a1a933a0dfd302a3fde73642b2b06

by KernelCI bot

Hello, Status summary for stable/linux-6.6.y Dashboard: https://d.kernelci.org/c/stable/linux-6.6.y/bb9c90ab9c5a1a933a0dfd302a3fde7… giturl: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git branch: linux-6.6.y commit hash: bb9c90ab9c5a1a933a0dfd302a3fde73642b2b06 origin: maestro test start time: 2025-08-15 10:52:19.705000+00:00 Builds: 45 ✅ 0 ❌ 0 ⚠️ Boots: 60 ✅ 0 ❌ 42 ⚠️ Tests: 3948 ✅ 607 ❌ 1617 ⚠️ ### POSSIBLE REGRESSIONS No possible regressions observed. ### FIXED REGRESSIONS No fixed regressions observed. ### UNSTABLE TESTS Hardware: bcm2711-rpi-4-b - boot (defconfig+lab-setup+kselftest) last run: https://d.kernelci.org/test/maestro:689f184b233e484a3f986be3 history: > ✅ > ✅ > ⚠️ Hardware: dell-latitude-3445-7520c-skyrim - boot (cros://chromeos-6.6/x86_64/chromeos-amd-stoneyridge.flavour.config+lab-setup+x86-board+CONFIG_MODULE_COMPRESS=n+CONFIG_MODULE_COMPRESS_NONE=y) last run: https://d.kernelci.org/test/maestro:689f24dd233e484a3f98e2c2 history: > ⚠️ > ⚠️ Sent every day if there were changes in the past 24 hours. Legend: ✅ PASS ❌ FAIL ⚠️ INCONCLUSIVE -- This is an experimental report format. Please send feedback in! Talk to us at kernelci(a)lists.linux.dev Made with love by the KernelCI team - https://kernelci.org

1 month

1
0
0 0

[STATUS] stable/linux-6.12.y - 880e4ff5d6c8dc6b660f163a0e9b68b898cc6310

by KernelCI bot

Hello, Status summary for stable/linux-6.12.y Dashboard: https://d.kernelci.org/c/stable/linux-6.12.y/880e4ff5d6c8dc6b660f163a0e9b68… giturl: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git branch: linux-6.12.y commit hash: 880e4ff5d6c8dc6b660f163a0e9b68b898cc6310 origin: maestro test start time: 2025-08-15 10:52:20.130000+00:00 Builds: 44 ✅ 0 ❌ 1 ⚠️ Boots: 160 ✅ 1 ❌ 41 ⚠️ Tests: 10405 ✅ 5245 ❌ 3110 ⚠️ ### POSSIBLE REGRESSIONS No possible regressions observed. ### FIXED REGRESSIONS No fixed regressions observed. ### UNSTABLE TESTS Hardware: acer-cb317-1h-c3z6-dedede - kernelci_wifi_basic (x86_64_defconfig+lab-setup+x86-board+kselftest) last run: https://d.kernelci.org/test/maestro:689f1bf6233e484a3f98a8b1 history: > ⚠️ > ❌ Hardware: acer-chromebox-cxi4-puff - tast (cros://chromeos-6.6/x86_64/chromeos-intel-pineview.flavour.config+lab-setup+x86-board+CONFIG_MODULE_COMPRESS=n+CONFIG_MODULE_COMPRESS_NONE=y) last run: https://d.kernelci.org/test/maestro:689f2110233e484a3f98ccb7 history: > ⚠️ > ❌ > ⚠️ > ⚠️ > ⚠️ Hardware: bcm2711-rpi-4-b - boot (defconfig+lab-setup+kselftest) last run: https://d.kernelci.org/test/maestro:689f1a23233e484a3f9880c8 history: > ✅ > ✅ > ⚠️ Hardware: dell-latitude-3445-7520c-skyrim - boot (cros://chromeos-6.6/x86_64/chromeos-amd-stoneyridge.flavour.config+lab-setup+x86-board+CONFIG_MODULE_COMPRESS=n+CONFIG_MODULE_COMPRESS_NONE=y) last run: https://d.kernelci.org/test/maestro:689f17c2233e484a3f986a63 history: > ⚠️ > ⚠️ Hardware: hp-14-db0003na-grunt - tast (cros://chromeos-6.6/x86_64/chromeos-amd-stoneyridge.flavour.config+lab-setup+x86-board+CONFIG_MODULE_COMPRESS=n+CONFIG_MODULE_COMPRESS_NONE=y) last run: https://d.kernelci.org/test/maestro:689f17d9233e484a3f986b39 history: > ⚠️ > ❌ > ⚠️ > ⚠️ > ⚠️ Hardware: hp-x360-14a-cb0001xx-zork - tast (cros://chromeos-6.6/x86_64/chromeos-amd-stoneyridge.flavour.config+lab-setup+x86-board+CONFIG_MODULE_COMPRESS=n+CONFIG_MODULE_COMPRESS_NONE=y) last run: https://d.kernelci.org/test/maestro:689f17db233e484a3f986b42 history: > ⚠️ > ⚠️ > ⚠️ > ❌ > ⚠️ Hardware: lenovo-TPad-C13-Yoga-zork - tast (cros://chromeos-6.6/x86_64/chromeos-amd-stoneyridge.flavour.config+lab-setup+x86-board+CONFIG_MODULE_COMPRESS=n+CONFIG_MODULE_COMPRESS_NONE=y) last run: https://d.kernelci.org/test/maestro:689f17db233e484a3f986b45 history: > ⚠️ > ⚠️ > ⚠️ > ⚠️ > ⚠️ Sent every day if there were changes in the past 24 hours. Legend: ✅ PASS ❌ FAIL ⚠️ INCONCLUSIVE -- This is an experimental report format. Please send feedback in! Talk to us at kernelci(a)lists.linux.dev Made with love by the KernelCI team - https://kernelci.org

1 month

1
0
0 0

[STATUS] stable/linux-6.1.y - 0bc96de781b4da716c8dbd248af4b26d8d8341f5

by KernelCI bot

Hello, Status summary for stable/linux-6.1.y Dashboard: https://d.kernelci.org/c/stable/linux-6.1.y/0bc96de781b4da716c8dbd248af4b26… giturl: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git branch: linux-6.1.y commit hash: 0bc96de781b4da716c8dbd248af4b26d8d8341f5 origin: maestro test start time: 2025-08-15 10:52:19.284000+00:00 Builds: 44 ✅ 1 ❌ 0 ⚠️ Boots: 35 ✅ 0 ❌ 24 ⚠️ Tests: 1994 ✅ 166 ❌ 1054 ⚠️ ### POSSIBLE REGRESSIONS No possible regressions observed. ### FIXED REGRESSIONS No fixed regressions observed. ### UNSTABLE TESTS Hardware: bcm2711-rpi-4-b - boot (defconfig+lab-setup+kselftest) last run: https://d.kernelci.org/test/maestro:689f28a2233e484a3f98e9a8 history: > ✅ > ✅ > ⚠️ Sent every day if there were changes in the past 24 hours. Legend: ✅ PASS ❌ FAIL ⚠️ INCONCLUSIVE -- This is an experimental report format. Please send feedback in! Talk to us at kernelci(a)lists.linux.dev Made with love by the KernelCI team - https://kernelci.org

1 month

1
0
0 0

[PATCH 2/2] riscv, bpf: use lw when reading int cpu in bpf_get_smp_processor_id

by Radim Krčmář

emit_ld is wrong, because thread_info.cpu is 32-bit, not xlen-bit wide. The struct currently has a hole after cpu, so little endian accesses seemed fine. Fixes: 2ddec2c80b44 ("riscv, bpf: inline bpf_get_smp_processor_id()") Cc: <stable(a)vger.kernel.org> Signed-off-by: Radim Krčmář <rkrcmar(a)ventanamicro.com> --- arch/riscv/net/bpf_jit_comp64.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/riscv/net/bpf_jit_comp64.c b/arch/riscv/net/bpf_jit_comp64.c index 6e1554d89681..9883a55d61b5 100644 --- a/arch/riscv/net/bpf_jit_comp64.c +++ b/arch/riscv/net/bpf_jit_comp64.c @@ -1763,7 +1763,7 @@ int bpf_jit_emit_insn(const struct bpf_insn *insn, struct rv_jit_context *ctx, */ if (insn->src_reg == 0 && insn->imm == BPF_FUNC_get_smp_processor_id) { /* Load current CPU number in R0 */ - emit_ld(bpf_to_rv_reg(BPF_REG_0, ctx), offsetof(struct thread_info, cpu), + emit_lw(bpf_to_rv_reg(BPF_REG_0, ctx), offsetof(struct thread_info, cpu), RV_REG_TP, ctx); break; } -- 2.50.0

1 month

2
1
0 0

[PATCH 1/2] riscv, bpf: use lw when reading int cpu in BPF_MOV64_PERCPU_REG

by Radim Krčmář

emit_ld is wrong, because thread_info.cpu is 32-bit, not xlen-bit wide. The struct currently has a hole after cpu, so little endian accesses seemed fine. Fixes: 19c56d4e5be1 ("riscv, bpf: add internal-only MOV instruction to resolve per-CPU addrs") Cc: <stable(a)vger.kernel.org> Signed-off-by: Radim Krčmář <rkrcmar(a)ventanamicro.com> --- arch/riscv/net/bpf_jit_comp64.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/riscv/net/bpf_jit_comp64.c b/arch/riscv/net/bpf_jit_comp64.c index 10e01ff06312..6e1554d89681 100644 --- a/arch/riscv/net/bpf_jit_comp64.c +++ b/arch/riscv/net/bpf_jit_comp64.c @@ -1356,7 +1356,7 @@ int bpf_jit_emit_insn(const struct bpf_insn *insn, struct rv_jit_context *ctx, emit_mv(rd, rs, ctx); #ifdef CONFIG_SMP /* Load current CPU number in T1 */ - emit_ld(RV_REG_T1, offsetof(struct thread_info, cpu), + emit_lw(RV_REG_T1, offsetof(struct thread_info, cpu), RV_REG_TP, ctx); /* Load address of __per_cpu_offset array in T2 */ emit_addr(RV_REG_T2, (u64)&__per_cpu_offset, extra_pass, ctx); -- 2.50.0

1 month

2
1
0 0

[PATCH v2] drm/mediatek: Fix device/node reference count leaks in mtk_drm_get_all_drm_priv

by Ma Ke

Using device_find_child() and of_find_device_by_node() to locate devices could cause an imbalance in the device's reference count. device_find_child() and of_find_device_by_node() both call get_device() to increment the reference count of the found device before returning the pointer. In mtk_drm_get_all_drm_priv(), these references are never released through put_device(), resulting in permanent reference count increments. Additionally, the for_each_child_of_node() iterator fails to release node references in all code paths. This leaks device node references when loop termination occurs before reaching MAX_CRTC. These reference count leaks may prevent device/node resources from being properly released during driver unbind operations. As comment of device_find_child() says, 'NOTE: you will need to drop the reference with put_device() after use'. Found by code review. Cc: stable(a)vger.kernel.org Fixes: 1ef7ed48356c ("drm/mediatek: Modify mediatek-drm for mt8195 multi mmsys support") Signed-off-by: Ma Ke <make24(a)iscas.ac.cn> --- Changes in v2: - added goto labels as suggestions. --- drivers/gpu/drm/mediatek/mtk_drm_drv.c | 21 ++++++++++++++------- 1 file changed, 14 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c index d5e6bab36414..f8a817689e16 100644 --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c @@ -387,19 +387,19 @@ static bool mtk_drm_get_all_drm_priv(struct device *dev) of_id = of_match_node(mtk_drm_of_ids, node); if (!of_id) - continue; + goto next_put_node; pdev = of_find_device_by_node(node); if (!pdev) - continue; + goto next_put_node; drm_dev = device_find_child(&pdev->dev, NULL, mtk_drm_match); if (!drm_dev) - continue; + goto next_put_device_pdev_dev; temp_drm_priv = dev_get_drvdata(drm_dev); if (!temp_drm_priv) - continue; + goto next_put_device_drm_dev; if (temp_drm_priv->data->main_len) all_drm_priv[CRTC_MAIN] = temp_drm_priv; @@ -411,10 +411,17 @@ static bool mtk_drm_get_all_drm_priv(struct device *dev) if (temp_drm_priv->mtk_drm_bound) cnt++; - if (cnt == MAX_CRTC) { - of_node_put(node); +next_put_device_drm_dev: + put_device(drm_dev); + +next_put_device_pdev_dev: + put_device(&pdev->dev); + +next_put_node: + of_node_put(node); + + if (cnt == MAX_CRTC) break; - } } if (drm_priv->data->mmsys_dev_num == cnt) { -- 2.25.1

1 month

3
2
0 0

FAILED: patch "[PATCH] PCI/ACPI: Fix runtime PM ref imbalance on Hot-Plug Capable" failed to apply to 6.12-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.12-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.12.y git checkout FETCH_HEAD git cherry-pick -x 6cff20ce3b92ffbf2fc5eb9e5a030b3672aa414a # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025081508-ultra-derived-f72d@gregkh' --subject-prefix 'PATCH 6.12.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 6cff20ce3b92ffbf2fc5eb9e5a030b3672aa414a Mon Sep 17 00:00:00 2001 From: Lukas Wunner <lukas(a)wunner.de> Date: Sun, 13 Jul 2025 16:31:01 +0200 Subject: [PATCH] PCI/ACPI: Fix runtime PM ref imbalance on Hot-Plug Capable ports pci_bridge_d3_possible() is called from both pcie_portdrv_probe() and pcie_portdrv_remove() to determine whether runtime power management shall be enabled (on probe) or disabled (on remove) on a PCIe port. The underlying assumption is that pci_bridge_d3_possible() always returns the same value, else a runtime PM reference imbalance would occur. That assumption is not given if the PCIe port is inaccessible on remove due to hot-unplug: pci_bridge_d3_possible() calls pciehp_is_native(), which accesses Config Space to determine whether the port is Hot-Plug Capable. An inaccessible port returns "all ones", which is converted to "all zeroes" by pcie_capability_read_dword(). Hence the port no longer seems Hot-Plug Capable on remove even though it was on probe. The resulting runtime PM ref imbalance causes warning messages such as: pcieport 0000:02:04.0: Runtime PM usage count underflow! Avoid the Config Space access (and thus the runtime PM ref imbalance) by caching the Hot-Plug Capable bit in struct pci_dev. The struct already contains an "is_hotplug_bridge" flag, which however is not only set on Hot-Plug Capable PCIe ports, but also Conventional PCI Hot-Plug bridges and ACPI slots. The flag identifies bridges which are allocated additional MMIO and bus number resources to allow for hierarchy expansion. The kernel is somewhat sloppily using "is_hotplug_bridge" in a number of places to identify Hot-Plug Capable PCIe ports, even though the flag encompasses other devices. Subsequent commits replace these occurrences with the new flag to clearly delineate Hot-Plug Capable PCIe ports from other kinds of hotplug bridges. Document the existing "is_hotplug_bridge" and the new "is_pciehp" flag and document the (non-obvious) requirement that pci_bridge_d3_possible() always returns the same value across the entire lifetime of a bridge, including its hot-removal. Fixes: 5352a44a561d ("PCI: pciehp: Make pciehp_is_native() stricter") Reported-by: Laurent Bigonville <bigon(a)bigon.be> Closes: https://bugzilla.kernel.org/show_bug.cgi?id=220216 Reported-by: Mario Limonciello <mario.limonciello(a)amd.com> Closes: https://lore.kernel.org/r/20250609020223.269407-3-superm1@kernel.org/ Link: https://lore.kernel.org/all/20250620025535.3425049-3-superm1@kernel.org/T/#u Signed-off-by: Lukas Wunner <lukas(a)wunner.de> Signed-off-by: Bjorn Helgaas <bhelgaas(a)google.com> Acked-by: Rafael J. Wysocki <rafael(a)kernel.org> Cc: stable(a)vger.kernel.org # v4.18+ Link: https://patch.msgid.link/fe5dcc3b2e62ee1df7905d746bde161eb1b3291c.175239010… diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c index b78e0e417324..efe478e5073e 100644 --- a/drivers/pci/pci-acpi.c +++ b/drivers/pci/pci-acpi.c @@ -816,13 +816,11 @@ int pci_acpi_program_hp_params(struct pci_dev *dev) bool pciehp_is_native(struct pci_dev *bridge) { const struct pci_host_bridge *host; - u32 slot_cap; if (!IS_ENABLED(CONFIG_HOTPLUG_PCI_PCIE)) return false; - pcie_capability_read_dword(bridge, PCI_EXP_SLTCAP, &slot_cap); - if (!(slot_cap & PCI_EXP_SLTCAP_HPC)) + if (!bridge->is_pciehp) return false; if (pcie_ports_native) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index e9448d55113b..23d8fe98ddf9 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -3030,8 +3030,12 @@ static const struct dmi_system_id bridge_d3_blacklist[] = { * pci_bridge_d3_possible - Is it possible to put the bridge into D3 * @bridge: Bridge to check * - * This function checks if it is possible to move the bridge to D3. * Currently we only allow D3 for some PCIe ports and for Thunderbolt. + * + * Return: Whether it is possible to move the bridge to D3. + * + * The return value is guaranteed to be constant across the entire lifetime + * of the bridge, including its hot-removal. */ bool pci_bridge_d3_possible(struct pci_dev *bridge) { diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 4b8693ec9e4c..cf50be63bf5f 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1678,7 +1678,7 @@ void set_pcie_hotplug_bridge(struct pci_dev *pdev) pcie_capability_read_dword(pdev, PCI_EXP_SLTCAP, &reg32); if (reg32 & PCI_EXP_SLTCAP_HPC) - pdev->is_hotplug_bridge = 1; + pdev->is_hotplug_bridge = pdev->is_pciehp = 1; } static void set_pcie_thunderbolt(struct pci_dev *dev) diff --git a/include/linux/pci.h b/include/linux/pci.h index 05e68f35f392..d56d0dd80afb 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -328,6 +328,11 @@ struct rcec_ea; * determined (e.g., for Root Complex Integrated * Endpoints without the relevant Capability * Registers). + * @is_hotplug_bridge: Hotplug bridge of any kind (e.g. PCIe Hot-Plug Capable, + * Conventional PCI Hot-Plug, ACPI slot). + * Such bridges are allocated additional MMIO and bus + * number resources to allow for hierarchy expansion. + * @is_pciehp: PCIe Hot-Plug Capable bridge. */ struct pci_dev { struct list_head bus_list; /* Node in per-bus list */ @@ -451,6 +456,7 @@ struct pci_dev { unsigned int is_physfn:1; unsigned int is_virtfn:1; unsigned int is_hotplug_bridge:1; + unsigned int is_pciehp:1; unsigned int shpc_managed:1; /* SHPC owned by shpchp */ unsigned int is_thunderbolt:1; /* Thunderbolt controller */ /*

1 month

2
3
0 0

FAILED: patch "[PATCH] block: Make REQ_OP_ZONE_FINISH a write operation" failed to apply to 6.6-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.6-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y git checkout FETCH_HEAD git cherry-pick -x 3f66ccbaaef3a0c5bd844eab04e3207b4061c546 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025081543-graffiti-nastily-6e2b@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 3f66ccbaaef3a0c5bd844eab04e3207b4061c546 Mon Sep 17 00:00:00 2001 From: Damien Le Moal <dlemoal(a)kernel.org> Date: Wed, 25 Jun 2025 18:33:23 +0900 Subject: [PATCH] block: Make REQ_OP_ZONE_FINISH a write operation REQ_OP_ZONE_FINISH is defined as "12", which makes op_is_write(REQ_OP_ZONE_FINISH) return false, despite the fact that a zone finish operation is an operation that modifies a zone (transition it to full) and so should be considered as a write operation (albeit one that does not transfer any data to the device). Fix this by redefining REQ_OP_ZONE_FINISH to be an odd number (13), and redefine REQ_OP_ZONE_RESET and REQ_OP_ZONE_RESET_ALL using sequential odd numbers from that new value. Fixes: 6c1b1da58f8c ("block: add zone open, close and finish operations") Cc: stable(a)vger.kernel.org Signed-off-by: Damien Le Moal <dlemoal(a)kernel.org> Reviewed-by: Bart Van Assche <bvanassche(a)acm.org> Reviewed-by: Johannes Thumshirn <johannes.thumshirn(a)wdc.com> Reviewed-by: Christoph Hellwig <hch(a)lst.de> Link: https://lore.kernel.org/r/20250625093327.548866-2-dlemoal@kernel.org Signed-off-by: Jens Axboe <axboe(a)kernel.dk> diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h index 3d1577f07c1c..930daff207df 100644 --- a/include/linux/blk_types.h +++ b/include/linux/blk_types.h @@ -350,11 +350,11 @@ enum req_op { /* Close a zone */ REQ_OP_ZONE_CLOSE = (__force blk_opf_t)11, /* Transition a zone to full */ - REQ_OP_ZONE_FINISH = (__force blk_opf_t)12, + REQ_OP_ZONE_FINISH = (__force blk_opf_t)13, /* reset a zone write pointer */ - REQ_OP_ZONE_RESET = (__force blk_opf_t)13, + REQ_OP_ZONE_RESET = (__force blk_opf_t)15, /* reset all the zone present on the device */ - REQ_OP_ZONE_RESET_ALL = (__force blk_opf_t)15, + REQ_OP_ZONE_RESET_ALL = (__force blk_opf_t)17, /* Driver private requests */ REQ_OP_DRV_IN = (__force blk_opf_t)34,

1 month

2
2
0 0

FAILED: patch "[PATCH] fscrypt: Don't use problematic non-inline crypto engines" failed to apply to 6.1-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.1-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y git checkout FETCH_HEAD git cherry-pick -x b41c1d8d07906786c60893980d52688f31d114a6 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025081514-salad-crumpet-f125@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From b41c1d8d07906786c60893980d52688f31d114a6 Mon Sep 17 00:00:00 2001 From: Eric Biggers <ebiggers(a)kernel.org> Date: Fri, 4 Jul 2025 00:03:22 -0700 Subject: [PATCH] fscrypt: Don't use problematic non-inline crypto engines Make fscrypt no longer use Crypto API drivers for non-inline crypto engines, even when the Crypto API prioritizes them over CPU-based code (which unfortunately it often does). These drivers tend to be really problematic, especially for fscrypt's workload. This commit has no effect on inline crypto engines, which are different and do work well. Specifically, exclude drivers that have CRYPTO_ALG_KERN_DRIVER_ONLY or CRYPTO_ALG_ALLOCATES_MEMORY set. (Later, CRYPTO_ALG_ASYNC should be excluded too. That's omitted for now to keep this commit backportable, since until recently some CPU-based code had CRYPTO_ALG_ASYNC set.) There are two major issues with these drivers: bugs and performance. First, these drivers tend to be buggy. They're fundamentally much more error-prone and harder to test than the CPU-based code. They often don't get tested before kernel releases, and even if they do, the crypto self-tests don't properly test these drivers. Released drivers have en/decrypted or hashed data incorrectly. These bugs cause issues for fscrypt users who often didn't even want to use these drivers, e.g.: - https://github.com/google/fscryptctl/issues/32 - https://github.com/google/fscryptctl/issues/9 - https://lore.kernel.org/r/PH0PR02MB731916ECDB6C613665863B6CFFAA2@PH0PR02MB7… These drivers have also similarly caused issues for dm-crypt users, including data corruption and deadlocks. Since Linux v5.10, dm-crypt has disabled most of them by excluding CRYPTO_ALG_ALLOCATES_MEMORY. Second, these drivers tend to be *much* slower than the CPU-based code. This may seem counterintuitive, but benchmarks clearly show it. There's a *lot* of overhead associated with going to a hardware driver, off the CPU, and back again. To prove this, I gathered as many systems with this type of crypto engine as I could, and I measured synchronous encryption of 4096-byte messages (which matches fscrypt's workload): Intel Emerald Rapids server: AES-256-XTS: xts-aes-vaes-avx512 16171 MB/s [CPU-based, Vector AES] qat_aes_xts 289 MB/s [Offload, Intel QuickAssist] Qualcomm SM8650 HDK: AES-256-XTS: xts-aes-ce 4301 MB/s [CPU-based, ARMv8 Crypto Extensions] xts-aes-qce 73 MB/s [Offload, Qualcomm Crypto Engine] i.MX 8M Nano LPDDR4 EVK: AES-256-XTS: xts-aes-ce 647 MB/s [CPU-based, ARMv8 Crypto Extensions] xts(ecb-aes-caam) 20 MB/s [Offload, CAAM] AES-128-CBC-ESSIV: essiv(cbc-aes-caam,sha256-lib) 23 MB/s [Offload, CAAM] STM32MP157F-DK2: AES-256-XTS: xts-aes-neonbs 13.2 MB/s [CPU-based, ARM NEON] xts(stm32-ecb-aes) 3.1 MB/s [Offload, STM32 crypto engine] AES-128-CBC-ESSIV: essiv(cbc-aes-neonbs,sha256-lib) 14.7 MB/s [CPU-based, ARM NEON] essiv(stm32-cbc-aes,sha256-lib) 3.2 MB/s [Offload, STM32 crypto engine] Adiantum: adiantum(xchacha12-arm,aes-arm,nhpoly1305-neon) 52.8 MB/s [CPU-based, ARM scalar + NEON] So, there was no case in which the crypto engine was even *close* to being faster. On the first three, which have AES instructions in the CPU, the CPU was 30 to 55 times faster (!). Even on STM32MP157F-DK2 which has a Cortex-A7 CPU that doesn't have AES instructions, AES was over 4 times faster on the CPU. And Adiantum encryption, which is what actually should be used on CPUs like that, was over 17 times faster. Other justifications that have been given for these non-inline crypto engines (almost always coming from the hardware vendors, not actual users) don't seem very plausible either: - The crypto engine throughput could be improved by processing multiple requests concurrently. Currently irrelevant to fscrypt, since it doesn't do that. This would also be complex, and unhelpful in many cases. 2 of the 4 engines I tested even had only one queue. - Some of the engines, e.g. STM32, support hardware keys. Also currently irrelevant to fscrypt, since it doesn't support these. Interestingly, the STM32 driver itself doesn't support this either. - Free up CPU for other tasks and/or reduce energy usage. Not very plausible considering the "short" message length, driver overhead, and scheduling overhead. There's just very little time for the CPU to do something else like run another task or enter low-power state, before the message finishes and it's time to process the next one. - Some of these engines resist power analysis and electromagnetic attacks, while the CPU-based crypto generally does not. In theory, this sounds great. In practice, if this benefit requires the use of an off-CPU offload that massively regresses performance and has a low-quality, buggy driver, the price for this hardening (which is not relevant to most fscrypt users, and tends to be incomplete) is just too high. Inline crypto engines are much more promising here, as are on-CPU solutions like RISC-V High Assurance Cryptography. Fixes: b30ab0e03407 ("ext4 crypto: add ext4 encryption facilities") Cc: stable(a)vger.kernel.org Acked-by: Ard Biesheuvel <ardb(a)kernel.org> Link: https://lore.kernel.org/r/20250704070322.20692-1-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers(a)kernel.org> diff --git a/Documentation/filesystems/fscrypt.rst b/Documentation/filesystems/fscrypt.rst index f63791641c1d..696a5844bfa3 100644 --- a/Documentation/filesystems/fscrypt.rst +++ b/Documentation/filesystems/fscrypt.rst @@ -147,9 +147,8 @@ However, these ioctls have some limitations: were wiped. To partially solve this, you can add init_on_free=1 to your kernel command line. However, this has a performance cost. -- Secret keys might still exist in CPU registers, in crypto - accelerator hardware (if used by the crypto API to implement any of - the algorithms), or in other places not explicitly considered here. +- Secret keys might still exist in CPU registers or in other places + not explicitly considered here. Full system compromise ~~~~~~~~~~~~~~~~~~~~~~ @@ -406,9 +405,12 @@ the work is done by XChaCha12, which is much faster than AES when AES acceleration is unavailable. For more information about Adiantum, see `the Adiantum paper <https://eprint.iacr.org/2018/720.pdf>`_. -The (AES-128-CBC-ESSIV, AES-128-CBC-CTS) pair exists only to support -systems whose only form of AES acceleration is an off-CPU crypto -accelerator such as CAAM or CESA that does not support XTS. +The (AES-128-CBC-ESSIV, AES-128-CBC-CTS) pair was added to try to +provide a more efficient option for systems that lack AES instructions +in the CPU but do have a non-inline crypto engine such as CAAM or CESA +that supports AES-CBC (and not AES-XTS). This is deprecated. It has +been shown that just doing AES on the CPU is actually faster. +Moreover, Adiantum is faster still and is recommended on such systems. The remaining mode pairs are the "national pride ciphers": @@ -1318,22 +1320,13 @@ this by validating all top-level encryption policies prior to access. Inline encryption support ========================= -By default, fscrypt uses the kernel crypto API for all cryptographic -operations (other than HKDF, which fscrypt partially implements -itself). The kernel crypto API supports hardware crypto accelerators, -but only ones that work in the traditional way where all inputs and -outputs (e.g. plaintexts and ciphertexts) are in memory. fscrypt can -take advantage of such hardware, but the traditional acceleration -model isn't particularly efficient and fscrypt hasn't been optimized -for it. - -Instead, many newer systems (especially mobile SoCs) have *inline -encryption hardware* that can encrypt/decrypt data while it is on its -way to/from the storage device. Linux supports inline encryption -through a set of extensions to the block layer called *blk-crypto*. -blk-crypto allows filesystems to attach encryption contexts to bios -(I/O requests) to specify how the data will be encrypted or decrypted -in-line. For more information about blk-crypto, see +Many newer systems (especially mobile SoCs) have *inline encryption +hardware* that can encrypt/decrypt data while it is on its way to/from +the storage device. Linux supports inline encryption through a set of +extensions to the block layer called *blk-crypto*. blk-crypto allows +filesystems to attach encryption contexts to bios (I/O requests) to +specify how the data will be encrypted or decrypted in-line. For more +information about blk-crypto, see :ref:`Documentation/block/inline-encryption.rst <inline_encryption>`. On supported filesystems (currently ext4 and f2fs), fscrypt can use diff --git a/fs/crypto/fscrypt_private.h b/fs/crypto/fscrypt_private.h index c1d92074b65c..6e7164530a1e 100644 --- a/fs/crypto/fscrypt_private.h +++ b/fs/crypto/fscrypt_private.h @@ -45,6 +45,23 @@ */ #undef FSCRYPT_MAX_KEY_SIZE +/* + * This mask is passed as the third argument to the crypto_alloc_*() functions + * to prevent fscrypt from using the Crypto API drivers for non-inline crypto + * engines. Those drivers have been problematic for fscrypt. fscrypt users + * have reported hangs and even incorrect en/decryption with these drivers. + * Since going to the driver, off CPU, and back again is really slow, such + * drivers can be over 50 times slower than the CPU-based code for fscrypt's + * workload. Even on platforms that lack AES instructions on the CPU, using the + * offloads has been shown to be slower, even staying with AES. (Of course, + * Adiantum is faster still, and is the recommended option on such platforms...) + * + * Note that fscrypt also supports inline crypto engines. Those don't use the + * Crypto API and work much better than the old-style (non-inline) engines. + */ +#define FSCRYPT_CRYPTOAPI_MASK \ + (CRYPTO_ALG_ALLOCATES_MEMORY | CRYPTO_ALG_KERN_DRIVER_ONLY) + #define FSCRYPT_CONTEXT_V1 1 #define FSCRYPT_CONTEXT_V2 2 diff --git a/fs/crypto/hkdf.c b/fs/crypto/hkdf.c index 5c095c8aa3b5..b1ef506cd341 100644 --- a/fs/crypto/hkdf.c +++ b/fs/crypto/hkdf.c @@ -58,7 +58,7 @@ int fscrypt_init_hkdf(struct fscrypt_hkdf *hkdf, const u8 *master_key, u8 prk[HKDF_HASHLEN]; int err; - hmac_tfm = crypto_alloc_shash(HKDF_HMAC_ALG, 0, 0); + hmac_tfm = crypto_alloc_shash(HKDF_HMAC_ALG, 0, FSCRYPT_CRYPTOAPI_MASK); if (IS_ERR(hmac_tfm)) { fscrypt_err(NULL, "Error allocating " HKDF_HMAC_ALG ": %ld", PTR_ERR(hmac_tfm)); diff --git a/fs/crypto/keysetup.c b/fs/crypto/keysetup.c index a67e20d126c9..74d4a2e1ad23 100644 --- a/fs/crypto/keysetup.c +++ b/fs/crypto/keysetup.c @@ -104,7 +104,8 @@ fscrypt_allocate_skcipher(struct fscrypt_mode *mode, const u8 *raw_key, struct crypto_skcipher *tfm; int err; - tfm = crypto_alloc_skcipher(mode->cipher_str, 0, 0); + tfm = crypto_alloc_skcipher(mode->cipher_str, 0, + FSCRYPT_CRYPTOAPI_MASK); if (IS_ERR(tfm)) { if (PTR_ERR(tfm) == -ENOENT) { fscrypt_warn(inode, diff --git a/fs/crypto/keysetup_v1.c b/fs/crypto/keysetup_v1.c index b70521c55132..158ceae8a5bc 100644 --- a/fs/crypto/keysetup_v1.c +++ b/fs/crypto/keysetup_v1.c @@ -52,7 +52,8 @@ static int derive_key_aes(const u8 *master_key, struct skcipher_request *req = NULL; DECLARE_CRYPTO_WAIT(wait); struct scatterlist src_sg, dst_sg; - struct crypto_skcipher *tfm = crypto_alloc_skcipher("ecb(aes)", 0, 0); + struct crypto_skcipher *tfm = + crypto_alloc_skcipher("ecb(aes)", 0, FSCRYPT_CRYPTOAPI_MASK); if (IS_ERR(tfm)) { res = PTR_ERR(tfm);

1 month

2
1
0 0

FAILED: patch "[PATCH] fscrypt: Don't use problematic non-inline crypto engines" failed to apply to 6.6-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.6-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y git checkout FETCH_HEAD git cherry-pick -x b41c1d8d07906786c60893980d52688f31d114a6 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025081512-filter-droop-370f@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From b41c1d8d07906786c60893980d52688f31d114a6 Mon Sep 17 00:00:00 2001 From: Eric Biggers <ebiggers(a)kernel.org> Date: Fri, 4 Jul 2025 00:03:22 -0700 Subject: [PATCH] fscrypt: Don't use problematic non-inline crypto engines Make fscrypt no longer use Crypto API drivers for non-inline crypto engines, even when the Crypto API prioritizes them over CPU-based code (which unfortunately it often does). These drivers tend to be really problematic, especially for fscrypt's workload. This commit has no effect on inline crypto engines, which are different and do work well. Specifically, exclude drivers that have CRYPTO_ALG_KERN_DRIVER_ONLY or CRYPTO_ALG_ALLOCATES_MEMORY set. (Later, CRYPTO_ALG_ASYNC should be excluded too. That's omitted for now to keep this commit backportable, since until recently some CPU-based code had CRYPTO_ALG_ASYNC set.) There are two major issues with these drivers: bugs and performance. First, these drivers tend to be buggy. They're fundamentally much more error-prone and harder to test than the CPU-based code. They often don't get tested before kernel releases, and even if they do, the crypto self-tests don't properly test these drivers. Released drivers have en/decrypted or hashed data incorrectly. These bugs cause issues for fscrypt users who often didn't even want to use these drivers, e.g.: - https://github.com/google/fscryptctl/issues/32 - https://github.com/google/fscryptctl/issues/9 - https://lore.kernel.org/r/PH0PR02MB731916ECDB6C613665863B6CFFAA2@PH0PR02MB7… These drivers have also similarly caused issues for dm-crypt users, including data corruption and deadlocks. Since Linux v5.10, dm-crypt has disabled most of them by excluding CRYPTO_ALG_ALLOCATES_MEMORY. Second, these drivers tend to be *much* slower than the CPU-based code. This may seem counterintuitive, but benchmarks clearly show it. There's a *lot* of overhead associated with going to a hardware driver, off the CPU, and back again. To prove this, I gathered as many systems with this type of crypto engine as I could, and I measured synchronous encryption of 4096-byte messages (which matches fscrypt's workload): Intel Emerald Rapids server: AES-256-XTS: xts-aes-vaes-avx512 16171 MB/s [CPU-based, Vector AES] qat_aes_xts 289 MB/s [Offload, Intel QuickAssist] Qualcomm SM8650 HDK: AES-256-XTS: xts-aes-ce 4301 MB/s [CPU-based, ARMv8 Crypto Extensions] xts-aes-qce 73 MB/s [Offload, Qualcomm Crypto Engine] i.MX 8M Nano LPDDR4 EVK: AES-256-XTS: xts-aes-ce 647 MB/s [CPU-based, ARMv8 Crypto Extensions] xts(ecb-aes-caam) 20 MB/s [Offload, CAAM] AES-128-CBC-ESSIV: essiv(cbc-aes-caam,sha256-lib) 23 MB/s [Offload, CAAM] STM32MP157F-DK2: AES-256-XTS: xts-aes-neonbs 13.2 MB/s [CPU-based, ARM NEON] xts(stm32-ecb-aes) 3.1 MB/s [Offload, STM32 crypto engine] AES-128-CBC-ESSIV: essiv(cbc-aes-neonbs,sha256-lib) 14.7 MB/s [CPU-based, ARM NEON] essiv(stm32-cbc-aes,sha256-lib) 3.2 MB/s [Offload, STM32 crypto engine] Adiantum: adiantum(xchacha12-arm,aes-arm,nhpoly1305-neon) 52.8 MB/s [CPU-based, ARM scalar + NEON] So, there was no case in which the crypto engine was even *close* to being faster. On the first three, which have AES instructions in the CPU, the CPU was 30 to 55 times faster (!). Even on STM32MP157F-DK2 which has a Cortex-A7 CPU that doesn't have AES instructions, AES was over 4 times faster on the CPU. And Adiantum encryption, which is what actually should be used on CPUs like that, was over 17 times faster. Other justifications that have been given for these non-inline crypto engines (almost always coming from the hardware vendors, not actual users) don't seem very plausible either: - The crypto engine throughput could be improved by processing multiple requests concurrently. Currently irrelevant to fscrypt, since it doesn't do that. This would also be complex, and unhelpful in many cases. 2 of the 4 engines I tested even had only one queue. - Some of the engines, e.g. STM32, support hardware keys. Also currently irrelevant to fscrypt, since it doesn't support these. Interestingly, the STM32 driver itself doesn't support this either. - Free up CPU for other tasks and/or reduce energy usage. Not very plausible considering the "short" message length, driver overhead, and scheduling overhead. There's just very little time for the CPU to do something else like run another task or enter low-power state, before the message finishes and it's time to process the next one. - Some of these engines resist power analysis and electromagnetic attacks, while the CPU-based crypto generally does not. In theory, this sounds great. In practice, if this benefit requires the use of an off-CPU offload that massively regresses performance and has a low-quality, buggy driver, the price for this hardening (which is not relevant to most fscrypt users, and tends to be incomplete) is just too high. Inline crypto engines are much more promising here, as are on-CPU solutions like RISC-V High Assurance Cryptography. Fixes: b30ab0e03407 ("ext4 crypto: add ext4 encryption facilities") Cc: stable(a)vger.kernel.org Acked-by: Ard Biesheuvel <ardb(a)kernel.org> Link: https://lore.kernel.org/r/20250704070322.20692-1-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers(a)kernel.org> diff --git a/Documentation/filesystems/fscrypt.rst b/Documentation/filesystems/fscrypt.rst index f63791641c1d..696a5844bfa3 100644 --- a/Documentation/filesystems/fscrypt.rst +++ b/Documentation/filesystems/fscrypt.rst @@ -147,9 +147,8 @@ However, these ioctls have some limitations: were wiped. To partially solve this, you can add init_on_free=1 to your kernel command line. However, this has a performance cost. -- Secret keys might still exist in CPU registers, in crypto - accelerator hardware (if used by the crypto API to implement any of - the algorithms), or in other places not explicitly considered here. +- Secret keys might still exist in CPU registers or in other places + not explicitly considered here. Full system compromise ~~~~~~~~~~~~~~~~~~~~~~ @@ -406,9 +405,12 @@ the work is done by XChaCha12, which is much faster than AES when AES acceleration is unavailable. For more information about Adiantum, see `the Adiantum paper <https://eprint.iacr.org/2018/720.pdf>`_. -The (AES-128-CBC-ESSIV, AES-128-CBC-CTS) pair exists only to support -systems whose only form of AES acceleration is an off-CPU crypto -accelerator such as CAAM or CESA that does not support XTS. +The (AES-128-CBC-ESSIV, AES-128-CBC-CTS) pair was added to try to +provide a more efficient option for systems that lack AES instructions +in the CPU but do have a non-inline crypto engine such as CAAM or CESA +that supports AES-CBC (and not AES-XTS). This is deprecated. It has +been shown that just doing AES on the CPU is actually faster. +Moreover, Adiantum is faster still and is recommended on such systems. The remaining mode pairs are the "national pride ciphers": @@ -1318,22 +1320,13 @@ this by validating all top-level encryption policies prior to access. Inline encryption support ========================= -By default, fscrypt uses the kernel crypto API for all cryptographic -operations (other than HKDF, which fscrypt partially implements -itself). The kernel crypto API supports hardware crypto accelerators, -but only ones that work in the traditional way where all inputs and -outputs (e.g. plaintexts and ciphertexts) are in memory. fscrypt can -take advantage of such hardware, but the traditional acceleration -model isn't particularly efficient and fscrypt hasn't been optimized -for it. - -Instead, many newer systems (especially mobile SoCs) have *inline -encryption hardware* that can encrypt/decrypt data while it is on its -way to/from the storage device. Linux supports inline encryption -through a set of extensions to the block layer called *blk-crypto*. -blk-crypto allows filesystems to attach encryption contexts to bios -(I/O requests) to specify how the data will be encrypted or decrypted -in-line. For more information about blk-crypto, see +Many newer systems (especially mobile SoCs) have *inline encryption +hardware* that can encrypt/decrypt data while it is on its way to/from +the storage device. Linux supports inline encryption through a set of +extensions to the block layer called *blk-crypto*. blk-crypto allows +filesystems to attach encryption contexts to bios (I/O requests) to +specify how the data will be encrypted or decrypted in-line. For more +information about blk-crypto, see :ref:`Documentation/block/inline-encryption.rst <inline_encryption>`. On supported filesystems (currently ext4 and f2fs), fscrypt can use diff --git a/fs/crypto/fscrypt_private.h b/fs/crypto/fscrypt_private.h index c1d92074b65c..6e7164530a1e 100644 --- a/fs/crypto/fscrypt_private.h +++ b/fs/crypto/fscrypt_private.h @@ -45,6 +45,23 @@ */ #undef FSCRYPT_MAX_KEY_SIZE +/* + * This mask is passed as the third argument to the crypto_alloc_*() functions + * to prevent fscrypt from using the Crypto API drivers for non-inline crypto + * engines. Those drivers have been problematic for fscrypt. fscrypt users + * have reported hangs and even incorrect en/decryption with these drivers. + * Since going to the driver, off CPU, and back again is really slow, such + * drivers can be over 50 times slower than the CPU-based code for fscrypt's + * workload. Even on platforms that lack AES instructions on the CPU, using the + * offloads has been shown to be slower, even staying with AES. (Of course, + * Adiantum is faster still, and is the recommended option on such platforms...) + * + * Note that fscrypt also supports inline crypto engines. Those don't use the + * Crypto API and work much better than the old-style (non-inline) engines. + */ +#define FSCRYPT_CRYPTOAPI_MASK \ + (CRYPTO_ALG_ALLOCATES_MEMORY | CRYPTO_ALG_KERN_DRIVER_ONLY) + #define FSCRYPT_CONTEXT_V1 1 #define FSCRYPT_CONTEXT_V2 2 diff --git a/fs/crypto/hkdf.c b/fs/crypto/hkdf.c index 5c095c8aa3b5..b1ef506cd341 100644 --- a/fs/crypto/hkdf.c +++ b/fs/crypto/hkdf.c @@ -58,7 +58,7 @@ int fscrypt_init_hkdf(struct fscrypt_hkdf *hkdf, const u8 *master_key, u8 prk[HKDF_HASHLEN]; int err; - hmac_tfm = crypto_alloc_shash(HKDF_HMAC_ALG, 0, 0); + hmac_tfm = crypto_alloc_shash(HKDF_HMAC_ALG, 0, FSCRYPT_CRYPTOAPI_MASK); if (IS_ERR(hmac_tfm)) { fscrypt_err(NULL, "Error allocating " HKDF_HMAC_ALG ": %ld", PTR_ERR(hmac_tfm)); diff --git a/fs/crypto/keysetup.c b/fs/crypto/keysetup.c index a67e20d126c9..74d4a2e1ad23 100644 --- a/fs/crypto/keysetup.c +++ b/fs/crypto/keysetup.c @@ -104,7 +104,8 @@ fscrypt_allocate_skcipher(struct fscrypt_mode *mode, const u8 *raw_key, struct crypto_skcipher *tfm; int err; - tfm = crypto_alloc_skcipher(mode->cipher_str, 0, 0); + tfm = crypto_alloc_skcipher(mode->cipher_str, 0, + FSCRYPT_CRYPTOAPI_MASK); if (IS_ERR(tfm)) { if (PTR_ERR(tfm) == -ENOENT) { fscrypt_warn(inode, diff --git a/fs/crypto/keysetup_v1.c b/fs/crypto/keysetup_v1.c index b70521c55132..158ceae8a5bc 100644 --- a/fs/crypto/keysetup_v1.c +++ b/fs/crypto/keysetup_v1.c @@ -52,7 +52,8 @@ static int derive_key_aes(const u8 *master_key, struct skcipher_request *req = NULL; DECLARE_CRYPTO_WAIT(wait); struct scatterlist src_sg, dst_sg; - struct crypto_skcipher *tfm = crypto_alloc_skcipher("ecb(aes)", 0, 0); + struct crypto_skcipher *tfm = + crypto_alloc_skcipher("ecb(aes)", 0, FSCRYPT_CRYPTOAPI_MASK); if (IS_ERR(tfm)) { res = PTR_ERR(tfm);

1 month

2
1
0 0

[PATCH v2] drm/nouveau/gsp: fix mismatched alloc/free for kvmalloc()

by Qianfeng Rong

Replace kfree() with kvfree() for memory allocated by kvmalloc(). Compile-tested only. Cc: stable(a)vger.kernel.org Fixes: 8a8b1ec5261f ("drm/nouveau/gsp: split rpc handling out on its own") Signed-off-by: Qianfeng Rong <rongqianfeng(a)vivo.com> Reviewed-by: Timur Tabi <ttabi(a)nvidia.com> Acked-by: Zhi Wang <zhiw(a)nvidia.com> --- v2: Add a Fixes: tag. --- drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r535/rpc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r535/rpc.c b/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r535/rpc.c index 9d06ff722fea..0dc4782df8c0 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r535/rpc.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r535/rpc.c @@ -325,7 +325,7 @@ r535_gsp_msgq_recv(struct nvkm_gsp *gsp, u32 gsp_rpc_len, int *retries) rpc = r535_gsp_msgq_peek(gsp, sizeof(*rpc), info.retries); if (IS_ERR_OR_NULL(rpc)) { - kfree(buf); + kvfree(buf); return rpc; } @@ -334,7 +334,7 @@ r535_gsp_msgq_recv(struct nvkm_gsp *gsp, u32 gsp_rpc_len, int *retries) rpc = r535_gsp_msgq_recv_one_elem(gsp, &info); if (IS_ERR_OR_NULL(rpc)) { - kfree(buf); + kvfree(buf); return rpc; } -- 2.34.1

1 month

2
1
0 0

[PATCH v3 0/2] iterate_folioq bug when offset==size (Was: [REGRESSION] 9pfs issues on 6.12-rc1)

by Dominique Martinet via B4 Relay

So we've had this regression in 9p for.. almost a year, which is way too long, but there was no "easy" reproducer until yesterday (thank you again!!) It turned out to be a bug with iov_iter on folios, iov_iter_get_pages_alloc2() would advance the iov_iter correctly up to the end edge of a folio and the later copy_to_iter() fails on the iterate_folioq() bug. Happy to consider alternative ways of fixing this, now there's a reproducer it's all much clearer; for the bug to be visible we basically need to make and IO with non-contiguous folios in the iov_iter which is not obvious to test with synthetic VMs, with size that triggers a zero-copy read followed by a non-zero-copy read. Signed-off-by: Dominique Martinet <asmadeus(a)codewreck.org> --- Changes in v3: - convert 'goto next' to a big "if there is valid data in current folio" Future optimizations can remove it again after making sure this (iov iter advanced to end of folio) can never happen. - Link to v2: https://lore.kernel.org/r/20250812-iot_iter_folio-v2-0-f99423309478@codewre… Changes in v2: - Fixed 'remain' being used uninitialized in iterate_folioq when going through the goto - s/forwarded/advanced in commit message - Link to v1: https://lore.kernel.org/r/20250811-iot_iter_folio-v1-0-d9c223adf93c@codewre… --- Dominique Martinet (2): iov_iter: iterate_folioq: fix handling of offset >= folio size iov_iter: iov_folioq_get_pages: don't leave empty slot behind include/linux/iov_iter.h | 20 +++++++++++--------- lib/iov_iter.c | 6 +++--- 2 files changed, 14 insertions(+), 12 deletions(-) --- base-commit: 8f5ae30d69d7543eee0d70083daf4de8fe15d585 change-id: 20250811-iot_iter_folio-1b7849f88fed Best regards, -- Dominique Martinet <asmadeus(a)codewreck.org>

1 month

3
3
0 0

FAILED: patch "[PATCH] NFS: Fix the setting of capabilities when automounting a new" failed to apply to 5.10-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.10-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.10.y git checkout FETCH_HEAD git cherry-pick -x b01f21cacde9f2878492cf318fee61bf4ccad323 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025081556-disprove-clumsy-91a1@gregkh' --subject-prefix 'PATCH 5.10.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From b01f21cacde9f2878492cf318fee61bf4ccad323 Mon Sep 17 00:00:00 2001 From: Trond Myklebust <trond.myklebust(a)hammerspace.com> Date: Sun, 3 Aug 2025 14:31:59 -0700 Subject: [PATCH] NFS: Fix the setting of capabilities when automounting a new filesystem Capabilities cannot be inherited when we cross into a new filesystem. They need to be reset to the minimal defaults, and then probed for again. Fixes: 54ceac451598 ("NFS: Share NFS superblocks per-protocol per-server per-FSID") Cc: stable(a)vger.kernel.org Reviewed-by: Benjamin Coddington <bcodding(a)redhat.com> Signed-off-by: Trond Myklebust <trond.myklebust(a)hammerspace.com> diff --git a/fs/nfs/client.c b/fs/nfs/client.c index e13eb429b8b5..8fb4a950dd55 100644 --- a/fs/nfs/client.c +++ b/fs/nfs/client.c @@ -682,6 +682,44 @@ struct nfs_client *nfs_init_client(struct nfs_client *clp, } EXPORT_SYMBOL_GPL(nfs_init_client); +static void nfs4_server_set_init_caps(struct nfs_server *server) +{ +#if IS_ENABLED(CONFIG_NFS_V4) + /* Set the basic capabilities */ + server->caps = server->nfs_client->cl_mvops->init_caps; + if (server->flags & NFS_MOUNT_NORDIRPLUS) + server->caps &= ~NFS_CAP_READDIRPLUS; + if (server->nfs_client->cl_proto == XPRT_TRANSPORT_RDMA) + server->caps &= ~NFS_CAP_READ_PLUS; + + /* + * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower + * authentication. + */ + if (nfs4_disable_idmapping && + server->client->cl_auth->au_flavor == RPC_AUTH_UNIX) + server->caps |= NFS_CAP_UIDGID_NOMAP; +#endif +} + +void nfs_server_set_init_caps(struct nfs_server *server) +{ + switch (server->nfs_client->rpc_ops->version) { + case 2: + server->caps = NFS_CAP_HARDLINKS | NFS_CAP_SYMLINKS; + break; + case 3: + server->caps = NFS_CAP_HARDLINKS | NFS_CAP_SYMLINKS; + if (!(server->flags & NFS_MOUNT_NORDIRPLUS)) + server->caps |= NFS_CAP_READDIRPLUS; + break; + default: + nfs4_server_set_init_caps(server); + break; + } +} +EXPORT_SYMBOL_GPL(nfs_server_set_init_caps); + /* * Create a version 2 or 3 client */ @@ -726,7 +764,6 @@ static int nfs_init_server(struct nfs_server *server, /* Initialise the client representation from the mount data */ server->flags = ctx->flags; server->options = ctx->options; - server->caps |= NFS_CAP_HARDLINKS | NFS_CAP_SYMLINKS; switch (clp->rpc_ops->version) { case 2: @@ -762,6 +799,8 @@ static int nfs_init_server(struct nfs_server *server, if (error < 0) goto error; + nfs_server_set_init_caps(server); + /* Preserve the values of mount_server-related mount options */ if (ctx->mount_server.addrlen) { memcpy(&server->mountd_address, &ctx->mount_server.address, @@ -934,7 +973,6 @@ void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *sour target->acregmax = source->acregmax; target->acdirmin = source->acdirmin; target->acdirmax = source->acdirmax; - target->caps = source->caps; target->options = source->options; target->auth_info = source->auth_info; target->port = source->port; @@ -1169,6 +1207,8 @@ struct nfs_server *nfs_clone_server(struct nfs_server *source, if (error < 0) goto out_free_server; + nfs_server_set_init_caps(server); + /* probe the filesystem info for this server filesystem */ error = nfs_probe_server(server, fh); if (error < 0) diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index 0143e0794d32..1a18d8d9be25 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -231,7 +231,7 @@ extern struct nfs_client * nfs4_find_client_sessionid(struct net *, const struct sockaddr *, struct nfs4_sessionid *, u32); extern struct nfs_server *nfs_create_server(struct fs_context *); -extern void nfs4_server_set_init_caps(struct nfs_server *); +extern void nfs_server_set_init_caps(struct nfs_server *); extern struct nfs_server *nfs4_create_server(struct fs_context *); extern struct nfs_server *nfs4_create_referral_server(struct fs_context *); extern int nfs4_update_server(struct nfs_server *server, const char *hostname, diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c index 2ea98f1f116f..6fddf43d729c 100644 --- a/fs/nfs/nfs4client.c +++ b/fs/nfs/nfs4client.c @@ -1074,24 +1074,6 @@ static void nfs4_session_limit_xasize(struct nfs_server *server) #endif } -void nfs4_server_set_init_caps(struct nfs_server *server) -{ - /* Set the basic capabilities */ - server->caps |= server->nfs_client->cl_mvops->init_caps; - if (server->flags & NFS_MOUNT_NORDIRPLUS) - server->caps &= ~NFS_CAP_READDIRPLUS; - if (server->nfs_client->cl_proto == XPRT_TRANSPORT_RDMA) - server->caps &= ~NFS_CAP_READ_PLUS; - - /* - * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower - * authentication. - */ - if (nfs4_disable_idmapping && - server->client->cl_auth->au_flavor == RPC_AUTH_UNIX) - server->caps |= NFS_CAP_UIDGID_NOMAP; -} - static int nfs4_server_common_setup(struct nfs_server *server, struct nfs_fh *mntfh, bool auth_probe) { @@ -1110,7 +1092,7 @@ static int nfs4_server_common_setup(struct nfs_server *server, if (error < 0) return error; - nfs4_server_set_init_caps(server); + nfs_server_set_init_caps(server); /* Probe the root fh to retrieve its FSID and filehandle */ error = nfs4_get_rootfh(server, mntfh, auth_probe); diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index d7dc669d84c5..c7c7ec22f21d 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -4092,7 +4092,7 @@ int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) }; int err; - nfs4_server_set_init_caps(server); + nfs_server_set_init_caps(server); do { err = nfs4_handle_exception(server, _nfs4_server_capabilities(server, fhandle),

1 month

2
4
0 0

FAILED: patch "[PATCH] nfsd: handle get_client_locked() failure in" failed to apply to 5.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.4.y git checkout FETCH_HEAD git cherry-pick -x 908e4ead7f757504d8b345452730636e298cbf68 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025081525-comprised-nastily-418e@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 908e4ead7f757504d8b345452730636e298cbf68 Mon Sep 17 00:00:00 2001 From: Jeff Layton <jlayton(a)kernel.org> Date: Wed, 4 Jun 2025 12:01:10 -0400 Subject: [PATCH] nfsd: handle get_client_locked() failure in nfsd4_setclientid_confirm() Lei Lu recently reported that nfsd4_setclientid_confirm() did not check the return value from get_client_locked(). a SETCLIENTID_CONFIRM could race with a confirmed client expiring and fail to get a reference. That could later lead to a UAF. Fix this by getting a reference early in the case where there is an extant confirmed client. If that fails then treat it as if there were no confirmed client found at all. In the case where the unconfirmed client is expiring, just fail and return the result from get_client_locked(). Reported-by: lei lu <llfamsec(a)gmail.com> Closes: https://lore.kernel.org/linux-nfs/CAEBF3_b=UvqzNKdnfD_52L05Mqrqui9vZ2eFamgA… Fixes: d20c11d86d8f ("nfsd: Protect session creation and client confirm using client_lock") Cc: stable(a)vger.kernel.org Signed-off-by: Jeff Layton <jlayton(a)kernel.org> Signed-off-by: Chuck Lever <chuck.lever(a)oracle.com> diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index a0e3fa2718c7..95d88555648d 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -4690,10 +4690,16 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp, } status = nfs_ok; if (conf) { - old = unconf; - unhash_client_locked(old); - nfsd4_change_callback(conf, &unconf->cl_cb_conn); - } else { + if (get_client_locked(conf) == nfs_ok) { + old = unconf; + unhash_client_locked(old); + nfsd4_change_callback(conf, &unconf->cl_cb_conn); + } else { + conf = NULL; + } + } + + if (!conf) { old = find_confirmed_client_by_name(&unconf->cl_name, nn); if (old) { status = nfserr_clid_inuse; @@ -4710,10 +4716,14 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp, } trace_nfsd_clid_replaced(&old->cl_clientid); } + status = get_client_locked(unconf); + if (status != nfs_ok) { + old = NULL; + goto out; + } move_to_confirmed(unconf); conf = unconf; } - get_client_locked(conf); spin_unlock(&nn->client_lock); if (conf == unconf) fsnotify_dentry(conf->cl_nfsd_info_dentry, FS_MODIFY);

1 month

2
1
0 0

FAILED: patch "[PATCH] net: enetc: fix device and OF node leak at probe" failed to apply to 5.15-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 70458f8a6b44daf3ad39f0d9b6d1097c8a7780ed # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025081557-glimmer-distill-dc47@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 70458f8a6b44daf3ad39f0d9b6d1097c8a7780ed Mon Sep 17 00:00:00 2001 From: Johan Hovold <johan(a)kernel.org> Date: Fri, 25 Jul 2025 19:12:10 +0200 Subject: [PATCH] net: enetc: fix device and OF node leak at probe Make sure to drop the references to the IERB OF node and platform device taken by of_parse_phandle() and of_find_device_by_node() during probe. Fixes: e7d48e5fbf30 ("net: enetc: add a mini driver for the Integrated Endpoint Register Block") Cc: stable(a)vger.kernel.org # 5.13 Cc: Vladimir Oltean <vladimir.oltean(a)nxp.com> Signed-off-by: Johan Hovold <johan(a)kernel.org> Reviewed-by: Simon Horman <horms(a)kernel.org> Link: https://patch.msgid.link/20250725171213.880-3-johan@kernel.org Signed-off-by: Jakub Kicinski <kuba(a)kernel.org> diff --git a/drivers/net/ethernet/freescale/enetc/enetc_pf.c b/drivers/net/ethernet/freescale/enetc/enetc_pf.c index f63a29e2e031..de0fb272c847 100644 --- a/drivers/net/ethernet/freescale/enetc/enetc_pf.c +++ b/drivers/net/ethernet/freescale/enetc/enetc_pf.c @@ -829,19 +829,29 @@ static int enetc_pf_register_with_ierb(struct pci_dev *pdev) { struct platform_device *ierb_pdev; struct device_node *ierb_node; + int ret; ierb_node = of_find_compatible_node(NULL, NULL, "fsl,ls1028a-enetc-ierb"); - if (!ierb_node || !of_device_is_available(ierb_node)) + if (!ierb_node) return -ENODEV; + if (!of_device_is_available(ierb_node)) { + of_node_put(ierb_node); + return -ENODEV; + } + ierb_pdev = of_find_device_by_node(ierb_node); of_node_put(ierb_node); if (!ierb_pdev) return -EPROBE_DEFER; - return enetc_ierb_register_pf(ierb_pdev, pdev); + ret = enetc_ierb_register_pf(ierb_pdev, pdev); + + put_device(&ierb_pdev->dev); + + return ret; } static const struct enetc_si_ops enetc_psi_ops = {

1 month

2
1
0 0

2025

2024

2023

2022

2021

2020

2019

2018

2017

Linux-stable-mirror