September 2025 - Linux-stable-mirror

[PATCH 6.6] net: mdiobus: release reset_gpio in mdiobus_unregister_device()

by Bence Csókás

From: Buday Csaba <buday.csaba(a)prolan.hu> reset_gpio is claimed in mdiobus_register_device(), but it is not released in mdiobus_unregister_device(). It is instead only released when the whole MDIO bus is unregistered. When a device uses the reset_gpio property, it becomes impossible to unregister it and register it again, because the GPIO remains claimed. This patch resolves that issue. Fixes: bafbdd527d56 ("phylib: Add device reset GPIO support") # see notes Reviewed-by: Andrew Lunn <andrew(a)lunn.ch> Cc: Csókás Bence <csokas.bence(a)prolan.hu> [ csokas.bence: Resolve rebase conflict and clarify msg ] Signed-off-by: Buday Csaba <buday.csaba(a)prolan.hu> Link: https://patch.msgid.link/20250807135449.254254-2-csokas.bence@prolan.hu Signed-off-by: Paolo Abeni <pabeni(a)redhat.com> [ Upstream commit 8ea25274ebaf2f6be8be374633b2ed8348ec0e70 ] [ csokas.bence: Use the v1 patch on top of 6.6, as specified in notes ] Signed-off-by: Bence Csókás <csokas.bence(a)prolan.hu> --- drivers/net/phy/mdio_bus.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c index 25dcaa49ab8b..e8fadd7a14fe 100644 --- a/drivers/net/phy/mdio_bus.c +++ b/drivers/net/phy/mdio_bus.c @@ -99,6 +99,7 @@ int mdiobus_unregister_device(struct mdio_device *mdiodev) if (mdiodev->bus->mdio_map[mdiodev->addr] != mdiodev) return -EINVAL; + gpiod_put(mdiodev->reset_gpio); reset_control_put(mdiodev->reset_ctrl); mdiodev->bus->mdio_map[mdiodev->addr] = NULL; @@ -775,9 +776,6 @@ void mdiobus_unregister(struct mii_bus *bus) if (!mdiodev) continue; - if (mdiodev->reset_gpio) - gpiod_put(mdiodev->reset_gpio); - mdiodev->device_remove(mdiodev); mdiodev->device_free(mdiodev); } -- 2.43.0

2 months, 4 weeks

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[PATCH 6.12] net: mdiobus: release reset_gpio in mdiobus_unregister_device()

by Bence Csókás

From: Buday Csaba <buday.csaba(a)prolan.hu> reset_gpio is claimed in mdiobus_register_device(), but it is not released in mdiobus_unregister_device(). It is instead only released when the whole MDIO bus is unregistered. When a device uses the reset_gpio property, it becomes impossible to unregister it and register it again, because the GPIO remains claimed. This patch resolves that issue. Fixes: bafbdd527d56 ("phylib: Add device reset GPIO support") # see notes Reviewed-by: Andrew Lunn <andrew(a)lunn.ch> Cc: Csókás Bence <csokas.bence(a)prolan.hu> [ csokas.bence: Resolve rebase conflict and clarify msg ] Signed-off-by: Buday Csaba <buday.csaba(a)prolan.hu> Link: https://patch.msgid.link/20250807135449.254254-2-csokas.bence@prolan.hu Signed-off-by: Paolo Abeni <pabeni(a)redhat.com> [ Upstream commit 8ea25274ebaf2f6be8be374633b2ed8348ec0e70 ] [ csokas.bence: Use the v1 patch on top of 6.12, as specified in notes ] Signed-off-by: Bence Csókás <csokas.bence(a)prolan.hu> --- drivers/net/phy/mdio_bus.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c index 591e8fd33d8e..a508cd81cd4e 100644 --- a/drivers/net/phy/mdio_bus.c +++ b/drivers/net/phy/mdio_bus.c @@ -97,6 +97,7 @@ int mdiobus_unregister_device(struct mdio_device *mdiodev) if (mdiodev->bus->mdio_map[mdiodev->addr] != mdiodev) return -EINVAL; + gpiod_put(mdiodev->reset_gpio); reset_control_put(mdiodev->reset_ctrl); mdiodev->bus->mdio_map[mdiodev->addr] = NULL; @@ -814,9 +815,6 @@ void mdiobus_unregister(struct mii_bus *bus) if (!mdiodev) continue; - if (mdiodev->reset_gpio) - gpiod_put(mdiodev->reset_gpio); - mdiodev->device_remove(mdiodev); mdiodev->device_free(mdiodev); } -- 2.43.0

2 months, 4 weeks

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[PATCH RESEND] fs/ntfs3: Fix a resource leak bug in wnd_extend()

by Haoxiang Li

Add put_bh() to decrease the refcount of 'bh' after the job is finished, preventing a resource leak. Fixes: 3f3b442b5ad2 ("fs/ntfs3: Add bitmap") Cc: stable(a)vger.kernel.org Signed-off-by: Haoxiang Li <haoxiang_li2024(a)163.com> --- fs/ntfs3/bitmap.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/ntfs3/bitmap.c b/fs/ntfs3/bitmap.c index 04107b950717..65d05e6a0566 100644 --- a/fs/ntfs3/bitmap.c +++ b/fs/ntfs3/bitmap.c @@ -1371,6 +1371,7 @@ int wnd_extend(struct wnd_bitmap *wnd, size_t new_bits) mark_buffer_dirty(bh); unlock_buffer(bh); /* err = sync_dirty_buffer(bh); */ + put_bh(bh); b0 = 0; bits -= op; -- 2.25.1

2 months, 4 weeks

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[PATCH v2] net: rfkill: gpio: Fix crash due to dereferencering uninitialized pointer

by Hans de Goede

Since commit 7d5e9737efda ("net: rfkill: gpio: get the name and type from device property") rfkill_find_type() gets called with the possibly uninitialized "const char *type_name;" local variable. On x86 systems when rfkill-gpio binds to a "BCM4752" or "LNV4752" acpi_device, the rfkill->type is set based on the ACPI acpi_device_id: rfkill->type = (unsigned)id->driver_data; and there is no "type" property so device_property_read_string() will fail and leave type_name uninitialized, leading to a potential crash. rfkill_find_type() does accept a NULL pointer, fix the potential crash by initializing type_name to NULL. Note likely sofar this has not been caught because: 1. Not many x86 machines actually have a "BCM4752"/"LNV4752" acpi_device 2. The stack happened to contain NULL where type_name is stored Fixes: 7d5e9737efda ("net: rfkill: gpio: get the name and type from device property") Cc: stable(a)vger.kernel.org Cc: Heikki Krogerus <heikki.krogerus(a)linux.intel.com> Signed-off-by: Hans de Goede <hansg(a)kernel.org> --- Changes in v2: - Fix typo in stable email address --- net/rfkill/rfkill-gpio.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/net/rfkill/rfkill-gpio.c b/net/rfkill/rfkill-gpio.c index 41e657e97761..cf2dcec6ce5a 100644 --- a/net/rfkill/rfkill-gpio.c +++ b/net/rfkill/rfkill-gpio.c @@ -94,10 +94,10 @@ static const struct dmi_system_id rfkill_gpio_deny_table[] = { static int rfkill_gpio_probe(struct platform_device *pdev) { struct rfkill_gpio_data *rfkill; - struct gpio_desc *gpio; + const char *type_name = NULL; const char *name_property; const char *type_property; - const char *type_name; + struct gpio_desc *gpio; int ret; if (dmi_check_system(rfkill_gpio_deny_table)) -- 2.51.0

2 months, 4 weeks

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[PATCH net V2 1/2] vhost-net: unbreak busy polling

by Jason Wang

Commit 67a873df0c41 ("vhost: basic in order support") pass the number of used elem to vhost_net_rx_peek_head_len() to make sure it can signal the used correctly before trying to do busy polling. But it forgets to clear the count, this would cause the count run out of sync with handle_rx() and break the busy polling. Fixing this by passing the pointer of the count and clearing it after the signaling the used. Acked-by: Michael S. Tsirkin <mst(a)redhat.com> Cc: stable(a)vger.kernel.org Fixes: 67a873df0c41 ("vhost: basic in order support") Signed-off-by: Jason Wang <jasowang(a)redhat.com> --- drivers/vhost/net.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c index c6508fe0d5c8..16e39f3ab956 100644 --- a/drivers/vhost/net.c +++ b/drivers/vhost/net.c @@ -1014,7 +1014,7 @@ static int peek_head_len(struct vhost_net_virtqueue *rvq, struct sock *sk) } static int vhost_net_rx_peek_head_len(struct vhost_net *net, struct sock *sk, - bool *busyloop_intr, unsigned int count) + bool *busyloop_intr, unsigned int *count) { struct vhost_net_virtqueue *rnvq = &net->vqs[VHOST_NET_VQ_RX]; struct vhost_net_virtqueue *tnvq = &net->vqs[VHOST_NET_VQ_TX]; @@ -1024,7 +1024,8 @@ static int vhost_net_rx_peek_head_len(struct vhost_net *net, struct sock *sk, if (!len && rvq->busyloop_timeout) { /* Flush batched heads first */ - vhost_net_signal_used(rnvq, count); + vhost_net_signal_used(rnvq, *count); + *count = 0; /* Both tx vq and rx socket were polled here */ vhost_net_busy_poll(net, rvq, tvq, busyloop_intr, true); @@ -1180,7 +1181,7 @@ static void handle_rx(struct vhost_net *net) do { sock_len = vhost_net_rx_peek_head_len(net, sock->sk, - &busyloop_intr, count); + &busyloop_intr, &count); if (!sock_len) break; sock_len += sock_hlen; -- 2.34.1

2 months, 4 weeks

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[PATCH] KVM: arm64: Fix debug checking for np-guests using huge mappings

by Ben Horgan

When running with transparent huge pages and CONFIG_NVHE_EL2_DEBUG then the debug checking in assert_host_shared_guest() fails on the launch of an np-guest. This WARN_ON() causes a panic and generates the stack below. In __pkvm_host_relax_perms_guest() the debug checking assumes the mapping is a single page but it may be a block map. Update the checking so that the size is not checked and just assumes the correct size. While we're here make the same fix in __pkvm_host_mkyoung_guest(). Info: # lkvm run -k /share/arch/arm64/boot/Image -m 704 -c 8 --name guest-128 Info: Removed ghost socket file "/.lkvm//guest-128.sock". [ 1406.521757] kvm [141]: nVHE hyp BUG at: arch/arm64/kvm/hyp/nvhe/mem_protect.c:1088! [ 1406.521804] kvm [141]: nVHE call trace: [ 1406.521828] kvm [141]: [<ffff8000811676b4>] __kvm_nvhe_hyp_panic+0xb4/0xe8 [ 1406.521946] kvm [141]: [<ffff80008116d12c>] __kvm_nvhe_assert_host_shared_guest+0xb0/0x10c [ 1406.522049] kvm [141]: [<ffff80008116f068>] __kvm_nvhe___pkvm_host_relax_perms_guest+0x48/0x104 [ 1406.522157] kvm [141]: [<ffff800081169df8>] __kvm_nvhe_handle___pkvm_host_relax_perms_guest+0x64/0x7c [ 1406.522250] kvm [141]: [<ffff800081169f0c>] __kvm_nvhe_handle_trap+0x8c/0x1a8 [ 1406.522333] kvm [141]: [<ffff8000811680fc>] __kvm_nvhe___skip_pauth_save+0x4/0x4 [ 1406.522454] kvm [141]: ---[ end nVHE call trace ]--- [ 1406.522477] kvm [141]: Hyp Offset: 0xfffece8013600000 [ 1406.522554] Kernel panic - not syncing: HYP panic: [ 1406.522554] PS:834003c9 PC:0000b1806db6d170 ESR:00000000f2000800 [ 1406.522554] FAR:ffff8000804be420 HPFAR:0000000000804be0 PAR:0000000000000000 [ 1406.522554] VCPU:0000000000000000 [ 1406.523337] CPU: 3 UID: 0 PID: 141 Comm: kvm-vcpu-0 Not tainted 6.16.0-rc7 #97 PREEMPT [ 1406.523485] Hardware name: FVP Base RevC (DT) [ 1406.523566] Call trace: [ 1406.523629] show_stack+0x18/0x24 (C) [ 1406.523753] dump_stack_lvl+0xd4/0x108 [ 1406.523899] dump_stack+0x18/0x24 [ 1406.524040] panic+0x3d8/0x448 [ 1406.524184] nvhe_hyp_panic_handler+0x10c/0x23c [ 1406.524325] kvm_handle_guest_abort+0x68c/0x109c [ 1406.524500] handle_exit+0x60/0x17c [ 1406.524630] kvm_arch_vcpu_ioctl_run+0x2e0/0x8c0 [ 1406.524794] kvm_vcpu_ioctl+0x1a8/0x9cc [ 1406.524919] __arm64_sys_ioctl+0xac/0x104 [ 1406.525067] invoke_syscall+0x48/0x10c [ 1406.525189] el0_svc_common.constprop.0+0x40/0xe0 [ 1406.525322] do_el0_svc+0x1c/0x28 [ 1406.525441] el0_svc+0x38/0x120 [ 1406.525588] el0t_64_sync_handler+0x10c/0x138 [ 1406.525750] el0t_64_sync+0x1ac/0x1b0 [ 1406.525876] SMP: stopping secondary CPUs [ 1406.525965] Kernel Offset: disabled [ 1406.526032] CPU features: 0x0000,00000080,8e134ca1,9446773f [ 1406.526130] Memory Limit: none [ 1406.959099] ---[ end Kernel panic - not syncing: HYP panic: [ 1406.959099] PS:834003c9 PC:0000b1806db6d170 ESR:00000000f2000800 [ 1406.959099] FAR:ffff8000804be420 HPFAR:0000000000804be0 PAR:0000000000000000 [ 1406.959099] VCPU:0000000000000000 ] Signed-off-by: Ben Horgan <ben.horgan(a)arm.com> Fixes: db14091d8f75 ("KVM: arm64: Stage-2 huge mappings for np-guests") Cc: Vincent Donnefort <vdonnefort(a)google.com> Cc: Quentin Perret <qperret(a)google.com> Cc: Ryan Roberts <ryan.roberts(a)arm.com> Cc: stable(a)vger.kernel.org --- This addresses the bug I raised here: https://lore.kernel.org/linux-arm-kernel/17b526ff-b824-4c24-8ac0-6821e5cc89… --- arch/arm64/kvm/hyp/nvhe/mem_protect.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/arch/arm64/kvm/hyp/nvhe/mem_protect.c b/arch/arm64/kvm/hyp/nvhe/mem_protect.c index 8957734d6183..ddc8beb55eee 100644 --- a/arch/arm64/kvm/hyp/nvhe/mem_protect.c +++ b/arch/arm64/kvm/hyp/nvhe/mem_protect.c @@ -1010,9 +1010,12 @@ static int __check_host_shared_guest(struct pkvm_hyp_vm *vm, u64 *__phys, u64 ip return ret; if (!kvm_pte_valid(pte)) return -ENOENT; - if (kvm_granule_size(level) != size) + if (size && kvm_granule_size(level) != size) return -E2BIG; + if (!size) + size = kvm_granule_size(level); + state = guest_get_page_state(pte, ipa); if (state != PKVM_PAGE_SHARED_BORROWED) return -EPERM; @@ -1100,7 +1103,7 @@ int __pkvm_host_relax_perms_guest(u64 gfn, struct pkvm_hyp_vcpu *vcpu, enum kvm_ if (prot & ~KVM_PGTABLE_PROT_RWX) return -EINVAL; - assert_host_shared_guest(vm, ipa, PAGE_SIZE); + assert_host_shared_guest(vm, ipa, 0); guest_lock_component(vm); ret = kvm_pgtable_stage2_relax_perms(&vm->pgt, ipa, prot, 0); guest_unlock_component(vm); @@ -1156,7 +1159,7 @@ int __pkvm_host_mkyoung_guest(u64 gfn, struct pkvm_hyp_vcpu *vcpu) if (pkvm_hyp_vm_is_protected(vm)) return -EPERM; - assert_host_shared_guest(vm, ipa, PAGE_SIZE); + assert_host_shared_guest(vm, ipa, 0); guest_lock_component(vm); kvm_pgtable_stage2_mkyoung(&vm->pgt, ipa, 0); guest_unlock_component(vm); -- 2.43.0

2 months, 4 weeks

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FAILED: patch "[PATCH] x86/cpu/topology: Always try cpu_parse_topology_ext() on" 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 cba4262a19afae21665ee242b3404bcede5a94d7 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025091430-empirical-late-479b@gregkh' --subject-prefix 'PATCH 6.12.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From cba4262a19afae21665ee242b3404bcede5a94d7 Mon Sep 17 00:00:00 2001 From: K Prateek Nayak <kprateek.nayak(a)amd.com> Date: Mon, 1 Sep 2025 17:04:15 +0000 Subject: [PATCH] x86/cpu/topology: Always try cpu_parse_topology_ext() on AMD/Hygon Support for parsing the topology on AMD/Hygon processors using CPUID leaf 0xb was added in 3986a0a805e6 ("x86/CPU/AMD: Derive CPU topology from CPUID function 0xB when available"). In an effort to keep all the topology parsing bits in one place, this commit also introduced a pseudo dependency on the TOPOEXT feature to parse the CPUID leaf 0xb. The TOPOEXT feature (CPUID 0x80000001 ECX[22]) advertises the support for Cache Properties leaf 0x8000001d and the CPUID leaf 0x8000001e EAX for "Extended APIC ID" however support for 0xb was introduced alongside the x2APIC support not only on AMD [1], but also historically on x86 [2]. Similar to 0xb, the support for extended CPU topology leaf 0x80000026 too does not depend on the TOPOEXT feature. The support for these leaves is expected to be confirmed by ensuring leaf <= {extended_}cpuid_level and then parsing the level 0 of the respective leaf to confirm EBX[15:0] (LogProcAtThisLevel) is non-zero as stated in the definition of "CPUID_Fn0000000B_EAX_x00 [Extended Topology Enumeration] (Core::X86::Cpuid::ExtTopEnumEax0)" in Processor Programming Reference (PPR) for AMD Family 19h Model 01h Rev B1 Vol1 [3] Sec. 2.1.15.1 "CPUID Instruction Functions". This has not been a problem on baremetal platforms since support for TOPOEXT (Fam 0x15 and later) predates the support for CPUID leaf 0xb (Fam 0x17[Zen2] and later), however, for AMD guests on QEMU, the "x2apic" feature can be enabled independent of the "topoext" feature where QEMU expects topology and the initial APICID to be parsed using the CPUID leaf 0xb (especially when number of cores > 255) which is populated independent of the "topoext" feature flag. Unconditionally call cpu_parse_topology_ext() on AMD and Hygon processors to first parse the topology using the XTOPOLOGY leaves (0x80000026 / 0xb) before using the TOPOEXT leaf (0x8000001e). While at it, break down the single large comment in parse_topology_amd() to better highlight the purpose of each CPUID leaf. Fixes: 3986a0a805e6 ("x86/CPU/AMD: Derive CPU topology from CPUID function 0xB when available") Suggested-by: Naveen N Rao (AMD) <naveen(a)kernel.org> Signed-off-by: K Prateek Nayak <kprateek.nayak(a)amd.com> Signed-off-by: Borislav Petkov (AMD) <bp(a)alien8.de> Cc: stable(a)vger.kernel.org # Only v6.9 and above; depends on x86 topology rewrite Link: https://lore.kernel.org/lkml/1529686927-7665-1-git-send-email-suravee.suthi… [1] Link: https://lore.kernel.org/lkml/20080818181435.523309000@linux-os.sc.intel.com/ [2] Link: https://bugzilla.kernel.org/show_bug.cgi?id=206537 [3] diff --git a/arch/x86/kernel/cpu/topology_amd.c b/arch/x86/kernel/cpu/topology_amd.c index 827dd0dbb6e9..c79ebbb639cb 100644 --- a/arch/x86/kernel/cpu/topology_amd.c +++ b/arch/x86/kernel/cpu/topology_amd.c @@ -175,27 +175,30 @@ static void topoext_fixup(struct topo_scan *tscan) static void parse_topology_amd(struct topo_scan *tscan) { - bool has_topoext = false; - /* - * If the extended topology leaf 0x8000_001e is available - * try to get SMT, CORE, TILE, and DIE shifts from extended + * Try to get SMT, CORE, TILE, and DIE shifts from extended * CPUID leaf 0x8000_0026 on supported processors first. If * extended CPUID leaf 0x8000_0026 is not supported, try to - * get SMT and CORE shift from leaf 0xb first, then try to - * get the CORE shift from leaf 0x8000_0008. + * get SMT and CORE shift from leaf 0xb. If either leaf is + * available, cpu_parse_topology_ext() will return true. */ - if (cpu_feature_enabled(X86_FEATURE_TOPOEXT)) - has_topoext = cpu_parse_topology_ext(tscan); + bool has_xtopology = cpu_parse_topology_ext(tscan); if (cpu_feature_enabled(X86_FEATURE_AMD_HTR_CORES)) tscan->c->topo.cpu_type = cpuid_ebx(0x80000026); - if (!has_topoext && !parse_8000_0008(tscan)) + /* + * If XTOPOLOGY leaves (0x26/0xb) are not available, try to + * get the CORE shift from leaf 0x8000_0008 first. + */ + if (!has_xtopology && !parse_8000_0008(tscan)) return; - /* Prefer leaf 0x8000001e if available */ - if (parse_8000_001e(tscan, has_topoext)) + /* + * Prefer leaf 0x8000001e if available to get the SMT shift and + * the initial APIC ID if XTOPOLOGY leaves are not available. + */ + if (parse_8000_001e(tscan, has_xtopology)) return; /* Try the NODEID MSR */

2 months, 4 weeks

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ポイント有効期限のお知らせ

by Αmeri𝗼an Εxpress

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2 months, 4 weeks

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FAILED: patch "[PATCH] drm/amdgpu: fix a memory leak in fence cleanup when unloading" 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 7838fb5f119191403560eca2e23613380c0e425e # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025091300-showing-concept-4f3d@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 7838fb5f119191403560eca2e23613380c0e425e Mon Sep 17 00:00:00 2001 From: Alex Deucher <alexander.deucher(a)amd.com> Date: Thu, 4 Sep 2025 12:35:05 -0400 Subject: [PATCH] drm/amdgpu: fix a memory leak in fence cleanup when unloading MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Commit b61badd20b44 ("drm/amdgpu: fix usage slab after free") reordered when amdgpu_fence_driver_sw_fini() was called after that patch, amdgpu_fence_driver_sw_fini() effectively became a no-op as the sched entities we never freed because the ring pointers were already set to NULL. Remove the NULL setting. Reported-by: Lin.Cao <lincao12(a)amd.com> Cc: Vitaly Prosyak <vitaly.prosyak(a)amd.com> Cc: Christian König <christian.koenig(a)amd.com> Fixes: b61badd20b44 ("drm/amdgpu: fix usage slab after free") Reviewed-by: Christian König <christian.koenig(a)amd.com> Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com> (cherry picked from commit a525fa37aac36c4591cc8b07ae8957862415fbd5) Cc: stable(a)vger.kernel.org diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c index 6379bb25bf5c..486c3646710c 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c @@ -421,8 +421,6 @@ void amdgpu_ring_fini(struct amdgpu_ring *ring) dma_fence_put(ring->vmid_wait); ring->vmid_wait = NULL; ring->me = 0; - - ring->adev->rings[ring->idx] = NULL; } /**

2 months, 4 weeks

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FAILED: patch "[PATCH] drm/amdgpu: fix a memory leak in fence cleanup when unloading" 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 7838fb5f119191403560eca2e23613380c0e425e # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025091359-extruding-tartly-9ee4@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 7838fb5f119191403560eca2e23613380c0e425e Mon Sep 17 00:00:00 2001 From: Alex Deucher <alexander.deucher(a)amd.com> Date: Thu, 4 Sep 2025 12:35:05 -0400 Subject: [PATCH] drm/amdgpu: fix a memory leak in fence cleanup when unloading MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Commit b61badd20b44 ("drm/amdgpu: fix usage slab after free") reordered when amdgpu_fence_driver_sw_fini() was called after that patch, amdgpu_fence_driver_sw_fini() effectively became a no-op as the sched entities we never freed because the ring pointers were already set to NULL. Remove the NULL setting. Reported-by: Lin.Cao <lincao12(a)amd.com> Cc: Vitaly Prosyak <vitaly.prosyak(a)amd.com> Cc: Christian König <christian.koenig(a)amd.com> Fixes: b61badd20b44 ("drm/amdgpu: fix usage slab after free") Reviewed-by: Christian König <christian.koenig(a)amd.com> Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com> (cherry picked from commit a525fa37aac36c4591cc8b07ae8957862415fbd5) Cc: stable(a)vger.kernel.org diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c index 6379bb25bf5c..486c3646710c 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c @@ -421,8 +421,6 @@ void amdgpu_ring_fini(struct amdgpu_ring *ring) dma_fence_put(ring->vmid_wait); ring->vmid_wait = NULL; ring->me = 0; - - ring->adev->rings[ring->idx] = NULL; } /**

2 months, 4 weeks

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