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FAILED: patch "[PATCH] tpm: Change to kvalloc() in eventlog/acpi.c" 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 a3a860bc0fd6c07332e4911cf9a238d20de90173 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025021024-rover-consensus-cde2@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From a3a860bc0fd6c07332e4911cf9a238d20de90173 Mon Sep 17 00:00:00 2001 From: Jarkko Sakkinen <jarkko(a)kernel.org> Date: Fri, 27 Dec 2024 17:39:09 +0200 Subject: [PATCH] tpm: Change to kvalloc() in eventlog/acpi.c The following failure was reported on HPE ProLiant D320: [ 10.693310][ T1] tpm_tis STM0925:00: 2.0 TPM (device-id 0x3, rev-id 0) [ 10.848132][ T1] ------------[ cut here ]------------ [ 10.853559][ T1] WARNING: CPU: 59 PID: 1 at mm/page_alloc.c:4727 __alloc_pages_noprof+0x2ca/0x330 [ 10.862827][ T1] Modules linked in: [ 10.866671][ T1] CPU: 59 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.12.0-lp155.2.g52785e2-default #1 openSUSE Tumbleweed (unreleased) 588cd98293a7c9eba9013378d807364c088c9375 [ 10.882741][ T1] Hardware name: HPE ProLiant DL320 Gen12/ProLiant DL320 Gen12, BIOS 1.20 10/28/2024 [ 10.892170][ T1] RIP: 0010:__alloc_pages_noprof+0x2ca/0x330 [ 10.898103][ T1] Code: 24 08 e9 4a fe ff ff e8 34 36 fa ff e9 88 fe ff ff 83 fe 0a 0f 86 b3 fd ff ff 80 3d 01 e7 ce 01 00 75 09 c6 05 f8 e6 ce 01 01 <0f> 0b 45 31 ff e9 e5 fe ff ff f7 c2 00 00 08 00 75 42 89 d9 80 e1 [ 10.917750][ T1] RSP: 0000:ffffb7cf40077980 EFLAGS: 00010246 [ 10.923777][ T1] RAX: 0000000000000000 RBX: 0000000000040cc0 RCX: 0000000000000000 [ 10.931727][ T1] RDX: 0000000000000000 RSI: 000000000000000c RDI: 0000000000040cc0 The above transcript shows that ACPI pointed a 16 MiB buffer for the log events because RSI maps to the 'order' parameter of __alloc_pages_noprof(). Address the bug by moving from devm_kmalloc() to devm_add_action() and kvmalloc() and devm_add_action(). Suggested-by: Ard Biesheuvel <ardb(a)kernel.org> Cc: stable(a)vger.kernel.org # v2.6.16+ Fixes: 55a82ab3181b ("[PATCH] tpm: add bios measurement log") Reported-by: Andy Liang <andy.liang(a)hpe.com> Closes: https://bugzilla.kernel.org/show_bug.cgi?id=219495 Reviewed-by: Ard Biesheuvel <ardb(a)kernel.org> Reviewed-by: Stefan Berger <stefanb(a)linux.ibm.com> Reviewed-by: Takashi Iwai <tiwai(a)suse.de> Tested-by: Andy Liang <andy.liang(a)hpe.com> Signed-off-by: Jarkko Sakkinen <jarkko(a)kernel.org> diff --git a/drivers/char/tpm/eventlog/acpi.c b/drivers/char/tpm/eventlog/acpi.c index 69533d0bfb51..cf02ec646f46 100644 --- a/drivers/char/tpm/eventlog/acpi.c +++ b/drivers/char/tpm/eventlog/acpi.c @@ -63,6 +63,11 @@ static bool tpm_is_tpm2_log(void *bios_event_log, u64 len) return n == 0; } +static void tpm_bios_log_free(void *data) +{ + kvfree(data); +} + /* read binary bios log */ int tpm_read_log_acpi(struct tpm_chip *chip) { @@ -136,7 +141,7 @@ int tpm_read_log_acpi(struct tpm_chip *chip) } /* malloc EventLog space */ - log->bios_event_log = devm_kmalloc(&chip->dev, len, GFP_KERNEL); + log->bios_event_log = kvmalloc(len, GFP_KERNEL); if (!log->bios_event_log) return -ENOMEM; @@ -161,10 +166,16 @@ int tpm_read_log_acpi(struct tpm_chip *chip) goto err; } + ret = devm_add_action(&chip->dev, tpm_bios_log_free, log->bios_event_log); + if (ret) { + log->bios_event_log = NULL; + goto err; + } + return format; err: - devm_kfree(&chip->dev, log->bios_event_log); + tpm_bios_log_free(log->bios_event_log); log->bios_event_log = NULL; return ret; }

2 weeks

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[PATCH stable-6.1 0/3] provided buffer recycling fixes

by Pavel Begunkov

Fixes for the provided buffers for not allowing kbufs to cross a single execution section. Upstream had most of it already fixed by chance, which is why all 3 patches refer to a single upstream commit. Pavel Begunkov (3): io_uring: fix multishots with selected buffers io_uring: fix io_req_prep_async with provided buffers io_uring/rw: commit provided buffer state on async io_uring/io_uring.c | 5 ++++- io_uring/poll.c | 2 ++ io_uring/rw.c | 10 ++++++++++ 3 files changed, 16 insertions(+), 1 deletion(-) -- 2.48.1

2 weeks

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[PATCH] phy: exynos5-usbdrd: fix MPLL_MULTIPLIER and SSC_REFCLKSEL masks in refclk

by Kaustabh Chakraborty

In exynos5_usbdrd_{pipe3,utmi}_set_refclk(), the masks PHYCLKRST_MPLL_MULTIPLIER_MASK and PHYCLKRST_SSC_REFCLKSEL_MASK are not inverted when applied to the register values. Fix it. Cc: stable(a)vger.kernel.org Fixes: 59025887fb08 ("phy: Add new Exynos5 USB 3.0 PHY driver") Signed-off-by: Kaustabh Chakraborty <kauschluss(a)disroot.org> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski(a)linaro.org> --- Patch picked up from: https://lore.kernel.org/all/20250204-exynos7870-usbphy-v1-1-f30a9857efeb@di… --- drivers/phy/samsung/phy-exynos5-usbdrd.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/phy/samsung/phy-exynos5-usbdrd.c b/drivers/phy/samsung/phy-exynos5-usbdrd.c index c421b495eb0fe4396d76f8c9d7c198ad7cd08869..4a108fdab118c0edd76bd88dc9dbf6a498e064b3 100644 --- a/drivers/phy/samsung/phy-exynos5-usbdrd.c +++ b/drivers/phy/samsung/phy-exynos5-usbdrd.c @@ -488,9 +488,9 @@ exynos5_usbdrd_pipe3_set_refclk(struct phy_usb_instance *inst) reg |= PHYCLKRST_REFCLKSEL_EXT_REFCLK; /* FSEL settings corresponding to reference clock */ - reg &= ~PHYCLKRST_FSEL_PIPE_MASK | - PHYCLKRST_MPLL_MULTIPLIER_MASK | - PHYCLKRST_SSC_REFCLKSEL_MASK; + reg &= ~(PHYCLKRST_FSEL_PIPE_MASK | + PHYCLKRST_MPLL_MULTIPLIER_MASK | + PHYCLKRST_SSC_REFCLKSEL_MASK); switch (phy_drd->extrefclk) { case EXYNOS5_FSEL_50MHZ: reg |= (PHYCLKRST_MPLL_MULTIPLIER_50M_REF | @@ -532,9 +532,9 @@ exynos5_usbdrd_utmi_set_refclk(struct phy_usb_instance *inst) reg &= ~PHYCLKRST_REFCLKSEL_MASK; reg |= PHYCLKRST_REFCLKSEL_EXT_REFCLK; - reg &= ~PHYCLKRST_FSEL_UTMI_MASK | - PHYCLKRST_MPLL_MULTIPLIER_MASK | - PHYCLKRST_SSC_REFCLKSEL_MASK; + reg &= ~(PHYCLKRST_FSEL_UTMI_MASK | + PHYCLKRST_MPLL_MULTIPLIER_MASK | + PHYCLKRST_SSC_REFCLKSEL_MASK); reg |= PHYCLKRST_FSEL(phy_drd->extrefclk); return reg; --- base-commit: df4b2bbff898227db0c14264ac7edd634e79f755 change-id: 20250208-exynos5-usbdrd-masks-7e9e6985c4b8 Best regards, -- Kaustabh Chakraborty <kauschluss(a)disroot.org>

2 weeks

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FAILED: patch "[PATCH] tty: xilinx_uartps: split sysrq handling" 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 b06f388994500297bb91be60ffaf6825ecfd2afe # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025020949-press-evolve-b900@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From b06f388994500297bb91be60ffaf6825ecfd2afe Mon Sep 17 00:00:00 2001 From: Sean Anderson <sean.anderson(a)linux.dev> Date: Fri, 10 Jan 2025 16:38:22 -0500 Subject: [PATCH] tty: xilinx_uartps: split sysrq handling lockdep detects the following circular locking dependency: CPU 0 CPU 1 ========================== ============================ cdns_uart_isr() printk() uart_port_lock(port) console_lock() cdns_uart_console_write() if (!port->sysrq) uart_port_lock(port) uart_handle_break() port->sysrq = ... uart_handle_sysrq_char() printk() console_lock() The fixed commit attempts to avoid this situation by only taking the port lock in cdns_uart_console_write if port->sysrq unset. However, if (as shown above) cdns_uart_console_write runs before port->sysrq is set, then it will try to take the port lock anyway. This may result in a deadlock. Fix this by splitting sysrq handling into two parts. We use the prepare helper under the port lock and defer handling until we release the lock. Fixes: 74ea66d4ca06 ("tty: xuartps: Improve sysrq handling") Signed-off-by: Sean Anderson <sean.anderson(a)linux.dev> Cc: stable(a)vger.kernel.org # c980248179d: serial: xilinx_uartps: Use port lock wrappers Acked-by: John Ogness <john.ogness(a)linutronix.de> Link: https://lore.kernel.org/r/20250110213822.2107462-1-sean.anderson@linux.dev Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c index beb151be4d32..92ec51870d1d 100644 --- a/drivers/tty/serial/xilinx_uartps.c +++ b/drivers/tty/serial/xilinx_uartps.c @@ -287,7 +287,7 @@ static void cdns_uart_handle_rx(void *dev_id, unsigned int isrstatus) continue; } - if (uart_handle_sysrq_char(port, data)) + if (uart_prepare_sysrq_char(port, data)) continue; if (is_rxbs_support) { @@ -495,7 +495,7 @@ static irqreturn_t cdns_uart_isr(int irq, void *dev_id) !(readl(port->membase + CDNS_UART_CR) & CDNS_UART_CR_RX_DIS)) cdns_uart_handle_rx(dev_id, isrstatus); - uart_port_unlock(port); + uart_unlock_and_check_sysrq(port); return IRQ_HANDLED; } @@ -1380,9 +1380,7 @@ static void cdns_uart_console_write(struct console *co, const char *s, unsigned int imr, ctrl; int locked = 1; - if (port->sysrq) - locked = 0; - else if (oops_in_progress) + if (oops_in_progress) locked = uart_port_trylock_irqsave(port, &flags); else uart_port_lock_irqsave(port, &flags);

2 weeks, 1 day

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[PATCH v3 0/3] mtd: rawnand: cadence: improvement and fixes

by niravkumar.l.rabara＠intel.com

From: Niravkumar L Rabara <niravkumar.l.rabara(a)intel.com> This patchset introduces improvements and fixes for cadence nand driver. The changes include: 1. Replace dma_request_channel() with dma_request_chan_by_mask() and use helper functions to return proper error code instead of fixed -EBUSY. 2. Remap the slave DMA I/O resources to enhance driver portability. 3. Fixed dma_unmap_single to use correct physical/bus device. v3 changes:- * Update commit message based on v2 review feedback for better clarity. * Use dma_request_chan_by_mask() and helper functions to return proper error code instead of fixed -EBUSY error code. link to v2: - https://lore.kernel.org/all/20250116032154.3976447-1-niravkumar.l.rabara@in… v2 changes:- * Added the missing Fixes and Cc: stable tags to the patches. link to v1: - https://lore.kernel.org/all/20250108135234.3107502-1-niravkumar.l.rabara@in… Niravkumar L Rabara (3): mtd: rawnand: cadence: fix error code in cadence_nand_init() mtd: rawnand: cadence: use dma_map_resource for sdma address mtd: rawnand: cadence: fix incorrect device in dma_unmap_single .../mtd/nand/raw/cadence-nand-controller.c | 42 ++++++++++++++----- 1 file changed, 31 insertions(+), 11 deletions(-) -- 2.25.1

2 weeks, 1 day

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FAILED: patch "[PATCH] mm: gup: fix infinite loop within __get_longterm_locked" 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 1aaf8c122918aa8897605a9aa1e8ed6600d6f930 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025021008-nemeses-footwork-0f1d@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 1aaf8c122918aa8897605a9aa1e8ed6600d6f930 Mon Sep 17 00:00:00 2001 From: Zhaoyang Huang <zhaoyang.huang(a)unisoc.com> Date: Tue, 21 Jan 2025 10:01:59 +0800 Subject: [PATCH] mm: gup: fix infinite loop within __get_longterm_locked We can run into an infinite loop in __get_longterm_locked() when collect_longterm_unpinnable_folios() finds only folios that are isolated from the LRU or were never added to the LRU. This can happen when all folios to be pinned are never added to the LRU, for example when vm_ops->fault allocated pages using cma_alloc() and never added them to the LRU. Fix it by simply taking a look at the list in the single caller, to see if anything was added. [zhaoyang.huang(a)unisoc.com: move definition of local] Link: https://lkml.kernel.org/r/20250122012604.3654667-1-zhaoyang.huang@unisoc.com Link: https://lkml.kernel.org/r/20250121020159.3636477-1-zhaoyang.huang@unisoc.com Fixes: 67e139b02d99 ("mm/gup.c: refactor check_and_migrate_movable_pages()") Signed-off-by: Zhaoyang Huang <zhaoyang.huang(a)unisoc.com> Reviewed-by: John Hubbard <jhubbard(a)nvidia.com> Reviewed-by: David Hildenbrand <david(a)redhat.com> Suggested-by: David Hildenbrand <david(a)redhat.com> Acked-by: David Hildenbrand <david(a)redhat.com> Cc: Aijun Sun <aijun.sun(a)unisoc.com> Cc: Alistair Popple <apopple(a)nvidia.com> Cc: <stable(a)vger.kernel.org> Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> diff --git a/mm/gup.c b/mm/gup.c index 9aaf338cc1f4..3883b307780e 100644 --- a/mm/gup.c +++ b/mm/gup.c @@ -2320,13 +2320,13 @@ static void pofs_unpin(struct pages_or_folios *pofs) /* * Returns the number of collected folios. Return value is always >= 0. */ -static unsigned long collect_longterm_unpinnable_folios( +static void collect_longterm_unpinnable_folios( struct list_head *movable_folio_list, struct pages_or_folios *pofs) { - unsigned long i, collected = 0; struct folio *prev_folio = NULL; bool drain_allow = true; + unsigned long i; for (i = 0; i < pofs->nr_entries; i++) { struct folio *folio = pofs_get_folio(pofs, i); @@ -2338,8 +2338,6 @@ static unsigned long collect_longterm_unpinnable_folios( if (folio_is_longterm_pinnable(folio)) continue; - collected++; - if (folio_is_device_coherent(folio)) continue; @@ -2361,8 +2359,6 @@ static unsigned long collect_longterm_unpinnable_folios( NR_ISOLATED_ANON + folio_is_file_lru(folio), folio_nr_pages(folio)); } - - return collected; } /* @@ -2439,11 +2435,9 @@ static long check_and_migrate_movable_pages_or_folios(struct pages_or_folios *pofs) { LIST_HEAD(movable_folio_list); - unsigned long collected; - collected = collect_longterm_unpinnable_folios(&movable_folio_list, - pofs); - if (!collected) + collect_longterm_unpinnable_folios(&movable_folio_list, pofs); + if (list_empty(&movable_folio_list)) return 0; return migrate_longterm_unpinnable_folios(&movable_folio_list, pofs);

2 weeks, 1 day

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FAILED: patch "[PATCH] media: uvcvideo: Remove dangling pointers" 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 221cd51efe4565501a3dbf04cc011b537dcce7fb # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025021037-enactment-bartender-d80d@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 221cd51efe4565501a3dbf04cc011b537dcce7fb Mon Sep 17 00:00:00 2001 From: Ricardo Ribalda <ribalda(a)chromium.org> Date: Tue, 3 Dec 2024 21:20:10 +0000 Subject: [PATCH] media: uvcvideo: Remove dangling pointers When an async control is written, we copy a pointer to the file handle that started the operation. That pointer will be used when the device is done. Which could be anytime in the future. If the user closes that file descriptor, its structure will be freed, and there will be one dangling pointer per pending async control, that the driver will try to use. Clean all the dangling pointers during release(). To avoid adding a performance penalty in the most common case (no async operation), a counter has been introduced with some logic to make sure that it is properly handled. Cc: stable(a)vger.kernel.org Fixes: e5225c820c05 ("media: uvcvideo: Send a control event when a Control Change interrupt arrives") Reviewed-by: Hans de Goede <hdegoede(a)redhat.com> Signed-off-by: Ricardo Ribalda <ribalda(a)chromium.org> Reviewed-by: Laurent Pinchart <laurent.pinchart(a)ideasonboard.com> Link: https://lore.kernel.org/r/20241203-uvc-fix-async-v6-3-26c867231118@chromium… Signed-off-by: Laurent Pinchart <laurent.pinchart(a)ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei(a)kernel.org> diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c index b05b84887e51..4837d8df9c03 100644 --- a/drivers/media/usb/uvc/uvc_ctrl.c +++ b/drivers/media/usb/uvc/uvc_ctrl.c @@ -1579,6 +1579,40 @@ static void uvc_ctrl_send_slave_event(struct uvc_video_chain *chain, uvc_ctrl_send_event(chain, handle, ctrl, mapping, val, changes); } +static void uvc_ctrl_set_handle(struct uvc_fh *handle, struct uvc_control *ctrl, + struct uvc_fh *new_handle) +{ + lockdep_assert_held(&handle->chain->ctrl_mutex); + + if (new_handle) { + if (ctrl->handle) + dev_warn_ratelimited(&handle->stream->dev->udev->dev, + "UVC non compliance: Setting an async control with a pending operation."); + + if (new_handle == ctrl->handle) + return; + + if (ctrl->handle) { + WARN_ON(!ctrl->handle->pending_async_ctrls); + if (ctrl->handle->pending_async_ctrls) + ctrl->handle->pending_async_ctrls--; + } + + ctrl->handle = new_handle; + handle->pending_async_ctrls++; + return; + } + + /* Cannot clear the handle for a control not owned by us.*/ + if (WARN_ON(ctrl->handle != handle)) + return; + + ctrl->handle = NULL; + if (WARN_ON(!handle->pending_async_ctrls)) + return; + handle->pending_async_ctrls--; +} + void uvc_ctrl_status_event(struct uvc_video_chain *chain, struct uvc_control *ctrl, const u8 *data) { @@ -1589,7 +1623,8 @@ void uvc_ctrl_status_event(struct uvc_video_chain *chain, mutex_lock(&chain->ctrl_mutex); handle = ctrl->handle; - ctrl->handle = NULL; + if (handle) + uvc_ctrl_set_handle(handle, ctrl, NULL); list_for_each_entry(mapping, &ctrl->info.mappings, list) { s32 value = __uvc_ctrl_get_value(mapping, data); @@ -1863,7 +1898,7 @@ static int uvc_ctrl_commit_entity(struct uvc_device *dev, if (!rollback && handle && ctrl->info.flags & UVC_CTRL_FLAG_ASYNCHRONOUS) - ctrl->handle = handle; + uvc_ctrl_set_handle(handle, ctrl, handle); } return 0; @@ -2772,6 +2807,26 @@ int uvc_ctrl_init_device(struct uvc_device *dev) return 0; } +void uvc_ctrl_cleanup_fh(struct uvc_fh *handle) +{ + struct uvc_entity *entity; + + guard(mutex)(&handle->chain->ctrl_mutex); + + if (!handle->pending_async_ctrls) + return; + + list_for_each_entry(entity, &handle->chain->dev->entities, list) { + for (unsigned int i = 0; i < entity->ncontrols; ++i) { + if (entity->controls[i].handle != handle) + continue; + uvc_ctrl_set_handle(handle, &entity->controls[i], NULL); + } + } + + WARN_ON(handle->pending_async_ctrls); +} + /* * Cleanup device controls. */ diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c index dee6feeba274..93c6cdb23881 100644 --- a/drivers/media/usb/uvc/uvc_v4l2.c +++ b/drivers/media/usb/uvc/uvc_v4l2.c @@ -671,6 +671,8 @@ static int uvc_v4l2_release(struct file *file) uvc_dbg(stream->dev, CALLS, "%s\n", __func__); + uvc_ctrl_cleanup_fh(handle); + /* Only free resources if this is a privileged handle. */ if (uvc_has_privileges(handle)) uvc_queue_release(&stream->queue); diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h index 965a789ed03e..5690cfd61e23 100644 --- a/drivers/media/usb/uvc/uvcvideo.h +++ b/drivers/media/usb/uvc/uvcvideo.h @@ -338,7 +338,11 @@ struct uvc_video_chain { struct uvc_entity *processing; /* Processing unit */ struct uvc_entity *selector; /* Selector unit */ - struct mutex ctrl_mutex; /* Protects ctrl.info */ + struct mutex ctrl_mutex; /* + * Protects ctrl.info, + * ctrl.handle and + * uvc_fh.pending_async_ctrls + */ struct v4l2_prio_state prio; /* V4L2 priority state */ u32 caps; /* V4L2 chain-wide caps */ @@ -613,6 +617,7 @@ struct uvc_fh { struct uvc_video_chain *chain; struct uvc_streaming *stream; enum uvc_handle_state state; + unsigned int pending_async_ctrls; }; struct uvc_driver { @@ -798,6 +803,8 @@ int uvc_ctrl_is_accessible(struct uvc_video_chain *chain, u32 v4l2_id, int uvc_xu_ctrl_query(struct uvc_video_chain *chain, struct uvc_xu_control_query *xqry); +void uvc_ctrl_cleanup_fh(struct uvc_fh *handle); + /* Utility functions */ struct usb_host_endpoint *uvc_find_endpoint(struct usb_host_interface *alts, u8 epaddr);

2 weeks, 1 day

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FAILED: patch "[PATCH] media: uvcvideo: Remove dangling pointers" 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 221cd51efe4565501a3dbf04cc011b537dcce7fb # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025021037-broadcast-cradling-b8a6@gregkh' --subject-prefix 'PATCH 5.10.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 221cd51efe4565501a3dbf04cc011b537dcce7fb Mon Sep 17 00:00:00 2001 From: Ricardo Ribalda <ribalda(a)chromium.org> Date: Tue, 3 Dec 2024 21:20:10 +0000 Subject: [PATCH] media: uvcvideo: Remove dangling pointers When an async control is written, we copy a pointer to the file handle that started the operation. That pointer will be used when the device is done. Which could be anytime in the future. If the user closes that file descriptor, its structure will be freed, and there will be one dangling pointer per pending async control, that the driver will try to use. Clean all the dangling pointers during release(). To avoid adding a performance penalty in the most common case (no async operation), a counter has been introduced with some logic to make sure that it is properly handled. Cc: stable(a)vger.kernel.org Fixes: e5225c820c05 ("media: uvcvideo: Send a control event when a Control Change interrupt arrives") Reviewed-by: Hans de Goede <hdegoede(a)redhat.com> Signed-off-by: Ricardo Ribalda <ribalda(a)chromium.org> Reviewed-by: Laurent Pinchart <laurent.pinchart(a)ideasonboard.com> Link: https://lore.kernel.org/r/20241203-uvc-fix-async-v6-3-26c867231118@chromium… Signed-off-by: Laurent Pinchart <laurent.pinchart(a)ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei(a)kernel.org> diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c index b05b84887e51..4837d8df9c03 100644 --- a/drivers/media/usb/uvc/uvc_ctrl.c +++ b/drivers/media/usb/uvc/uvc_ctrl.c @@ -1579,6 +1579,40 @@ static void uvc_ctrl_send_slave_event(struct uvc_video_chain *chain, uvc_ctrl_send_event(chain, handle, ctrl, mapping, val, changes); } +static void uvc_ctrl_set_handle(struct uvc_fh *handle, struct uvc_control *ctrl, + struct uvc_fh *new_handle) +{ + lockdep_assert_held(&handle->chain->ctrl_mutex); + + if (new_handle) { + if (ctrl->handle) + dev_warn_ratelimited(&handle->stream->dev->udev->dev, + "UVC non compliance: Setting an async control with a pending operation."); + + if (new_handle == ctrl->handle) + return; + + if (ctrl->handle) { + WARN_ON(!ctrl->handle->pending_async_ctrls); + if (ctrl->handle->pending_async_ctrls) + ctrl->handle->pending_async_ctrls--; + } + + ctrl->handle = new_handle; + handle->pending_async_ctrls++; + return; + } + + /* Cannot clear the handle for a control not owned by us.*/ + if (WARN_ON(ctrl->handle != handle)) + return; + + ctrl->handle = NULL; + if (WARN_ON(!handle->pending_async_ctrls)) + return; + handle->pending_async_ctrls--; +} + void uvc_ctrl_status_event(struct uvc_video_chain *chain, struct uvc_control *ctrl, const u8 *data) { @@ -1589,7 +1623,8 @@ void uvc_ctrl_status_event(struct uvc_video_chain *chain, mutex_lock(&chain->ctrl_mutex); handle = ctrl->handle; - ctrl->handle = NULL; + if (handle) + uvc_ctrl_set_handle(handle, ctrl, NULL); list_for_each_entry(mapping, &ctrl->info.mappings, list) { s32 value = __uvc_ctrl_get_value(mapping, data); @@ -1863,7 +1898,7 @@ static int uvc_ctrl_commit_entity(struct uvc_device *dev, if (!rollback && handle && ctrl->info.flags & UVC_CTRL_FLAG_ASYNCHRONOUS) - ctrl->handle = handle; + uvc_ctrl_set_handle(handle, ctrl, handle); } return 0; @@ -2772,6 +2807,26 @@ int uvc_ctrl_init_device(struct uvc_device *dev) return 0; } +void uvc_ctrl_cleanup_fh(struct uvc_fh *handle) +{ + struct uvc_entity *entity; + + guard(mutex)(&handle->chain->ctrl_mutex); + + if (!handle->pending_async_ctrls) + return; + + list_for_each_entry(entity, &handle->chain->dev->entities, list) { + for (unsigned int i = 0; i < entity->ncontrols; ++i) { + if (entity->controls[i].handle != handle) + continue; + uvc_ctrl_set_handle(handle, &entity->controls[i], NULL); + } + } + + WARN_ON(handle->pending_async_ctrls); +} + /* * Cleanup device controls. */ diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c index dee6feeba274..93c6cdb23881 100644 --- a/drivers/media/usb/uvc/uvc_v4l2.c +++ b/drivers/media/usb/uvc/uvc_v4l2.c @@ -671,6 +671,8 @@ static int uvc_v4l2_release(struct file *file) uvc_dbg(stream->dev, CALLS, "%s\n", __func__); + uvc_ctrl_cleanup_fh(handle); + /* Only free resources if this is a privileged handle. */ if (uvc_has_privileges(handle)) uvc_queue_release(&stream->queue); diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h index 965a789ed03e..5690cfd61e23 100644 --- a/drivers/media/usb/uvc/uvcvideo.h +++ b/drivers/media/usb/uvc/uvcvideo.h @@ -338,7 +338,11 @@ struct uvc_video_chain { struct uvc_entity *processing; /* Processing unit */ struct uvc_entity *selector; /* Selector unit */ - struct mutex ctrl_mutex; /* Protects ctrl.info */ + struct mutex ctrl_mutex; /* + * Protects ctrl.info, + * ctrl.handle and + * uvc_fh.pending_async_ctrls + */ struct v4l2_prio_state prio; /* V4L2 priority state */ u32 caps; /* V4L2 chain-wide caps */ @@ -613,6 +617,7 @@ struct uvc_fh { struct uvc_video_chain *chain; struct uvc_streaming *stream; enum uvc_handle_state state; + unsigned int pending_async_ctrls; }; struct uvc_driver { @@ -798,6 +803,8 @@ int uvc_ctrl_is_accessible(struct uvc_video_chain *chain, u32 v4l2_id, int uvc_xu_ctrl_query(struct uvc_video_chain *chain, struct uvc_xu_control_query *xqry); +void uvc_ctrl_cleanup_fh(struct uvc_fh *handle); + /* Utility functions */ struct usb_host_endpoint *uvc_find_endpoint(struct usb_host_interface *alts, u8 epaddr);

2 weeks, 1 day

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FAILED: patch "[PATCH] media: uvcvideo: Remove dangling pointers" 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 221cd51efe4565501a3dbf04cc011b537dcce7fb # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025021036-shrouded-exposable-96da@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 221cd51efe4565501a3dbf04cc011b537dcce7fb Mon Sep 17 00:00:00 2001 From: Ricardo Ribalda <ribalda(a)chromium.org> Date: Tue, 3 Dec 2024 21:20:10 +0000 Subject: [PATCH] media: uvcvideo: Remove dangling pointers When an async control is written, we copy a pointer to the file handle that started the operation. That pointer will be used when the device is done. Which could be anytime in the future. If the user closes that file descriptor, its structure will be freed, and there will be one dangling pointer per pending async control, that the driver will try to use. Clean all the dangling pointers during release(). To avoid adding a performance penalty in the most common case (no async operation), a counter has been introduced with some logic to make sure that it is properly handled. Cc: stable(a)vger.kernel.org Fixes: e5225c820c05 ("media: uvcvideo: Send a control event when a Control Change interrupt arrives") Reviewed-by: Hans de Goede <hdegoede(a)redhat.com> Signed-off-by: Ricardo Ribalda <ribalda(a)chromium.org> Reviewed-by: Laurent Pinchart <laurent.pinchart(a)ideasonboard.com> Link: https://lore.kernel.org/r/20241203-uvc-fix-async-v6-3-26c867231118@chromium… Signed-off-by: Laurent Pinchart <laurent.pinchart(a)ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei(a)kernel.org> diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c index b05b84887e51..4837d8df9c03 100644 --- a/drivers/media/usb/uvc/uvc_ctrl.c +++ b/drivers/media/usb/uvc/uvc_ctrl.c @@ -1579,6 +1579,40 @@ static void uvc_ctrl_send_slave_event(struct uvc_video_chain *chain, uvc_ctrl_send_event(chain, handle, ctrl, mapping, val, changes); } +static void uvc_ctrl_set_handle(struct uvc_fh *handle, struct uvc_control *ctrl, + struct uvc_fh *new_handle) +{ + lockdep_assert_held(&handle->chain->ctrl_mutex); + + if (new_handle) { + if (ctrl->handle) + dev_warn_ratelimited(&handle->stream->dev->udev->dev, + "UVC non compliance: Setting an async control with a pending operation."); + + if (new_handle == ctrl->handle) + return; + + if (ctrl->handle) { + WARN_ON(!ctrl->handle->pending_async_ctrls); + if (ctrl->handle->pending_async_ctrls) + ctrl->handle->pending_async_ctrls--; + } + + ctrl->handle = new_handle; + handle->pending_async_ctrls++; + return; + } + + /* Cannot clear the handle for a control not owned by us.*/ + if (WARN_ON(ctrl->handle != handle)) + return; + + ctrl->handle = NULL; + if (WARN_ON(!handle->pending_async_ctrls)) + return; + handle->pending_async_ctrls--; +} + void uvc_ctrl_status_event(struct uvc_video_chain *chain, struct uvc_control *ctrl, const u8 *data) { @@ -1589,7 +1623,8 @@ void uvc_ctrl_status_event(struct uvc_video_chain *chain, mutex_lock(&chain->ctrl_mutex); handle = ctrl->handle; - ctrl->handle = NULL; + if (handle) + uvc_ctrl_set_handle(handle, ctrl, NULL); list_for_each_entry(mapping, &ctrl->info.mappings, list) { s32 value = __uvc_ctrl_get_value(mapping, data); @@ -1863,7 +1898,7 @@ static int uvc_ctrl_commit_entity(struct uvc_device *dev, if (!rollback && handle && ctrl->info.flags & UVC_CTRL_FLAG_ASYNCHRONOUS) - ctrl->handle = handle; + uvc_ctrl_set_handle(handle, ctrl, handle); } return 0; @@ -2772,6 +2807,26 @@ int uvc_ctrl_init_device(struct uvc_device *dev) return 0; } +void uvc_ctrl_cleanup_fh(struct uvc_fh *handle) +{ + struct uvc_entity *entity; + + guard(mutex)(&handle->chain->ctrl_mutex); + + if (!handle->pending_async_ctrls) + return; + + list_for_each_entry(entity, &handle->chain->dev->entities, list) { + for (unsigned int i = 0; i < entity->ncontrols; ++i) { + if (entity->controls[i].handle != handle) + continue; + uvc_ctrl_set_handle(handle, &entity->controls[i], NULL); + } + } + + WARN_ON(handle->pending_async_ctrls); +} + /* * Cleanup device controls. */ diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c index dee6feeba274..93c6cdb23881 100644 --- a/drivers/media/usb/uvc/uvc_v4l2.c +++ b/drivers/media/usb/uvc/uvc_v4l2.c @@ -671,6 +671,8 @@ static int uvc_v4l2_release(struct file *file) uvc_dbg(stream->dev, CALLS, "%s\n", __func__); + uvc_ctrl_cleanup_fh(handle); + /* Only free resources if this is a privileged handle. */ if (uvc_has_privileges(handle)) uvc_queue_release(&stream->queue); diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h index 965a789ed03e..5690cfd61e23 100644 --- a/drivers/media/usb/uvc/uvcvideo.h +++ b/drivers/media/usb/uvc/uvcvideo.h @@ -338,7 +338,11 @@ struct uvc_video_chain { struct uvc_entity *processing; /* Processing unit */ struct uvc_entity *selector; /* Selector unit */ - struct mutex ctrl_mutex; /* Protects ctrl.info */ + struct mutex ctrl_mutex; /* + * Protects ctrl.info, + * ctrl.handle and + * uvc_fh.pending_async_ctrls + */ struct v4l2_prio_state prio; /* V4L2 priority state */ u32 caps; /* V4L2 chain-wide caps */ @@ -613,6 +617,7 @@ struct uvc_fh { struct uvc_video_chain *chain; struct uvc_streaming *stream; enum uvc_handle_state state; + unsigned int pending_async_ctrls; }; struct uvc_driver { @@ -798,6 +803,8 @@ int uvc_ctrl_is_accessible(struct uvc_video_chain *chain, u32 v4l2_id, int uvc_xu_ctrl_query(struct uvc_video_chain *chain, struct uvc_xu_control_query *xqry); +void uvc_ctrl_cleanup_fh(struct uvc_fh *handle); + /* Utility functions */ struct usb_host_endpoint *uvc_find_endpoint(struct usb_host_interface *alts, u8 epaddr);

2 weeks, 1 day

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FAILED: patch "[PATCH] media: uvcvideo: Remove dangling pointers" 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 221cd51efe4565501a3dbf04cc011b537dcce7fb # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025021036-footwork-entryway-f39c@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 221cd51efe4565501a3dbf04cc011b537dcce7fb Mon Sep 17 00:00:00 2001 From: Ricardo Ribalda <ribalda(a)chromium.org> Date: Tue, 3 Dec 2024 21:20:10 +0000 Subject: [PATCH] media: uvcvideo: Remove dangling pointers When an async control is written, we copy a pointer to the file handle that started the operation. That pointer will be used when the device is done. Which could be anytime in the future. If the user closes that file descriptor, its structure will be freed, and there will be one dangling pointer per pending async control, that the driver will try to use. Clean all the dangling pointers during release(). To avoid adding a performance penalty in the most common case (no async operation), a counter has been introduced with some logic to make sure that it is properly handled. Cc: stable(a)vger.kernel.org Fixes: e5225c820c05 ("media: uvcvideo: Send a control event when a Control Change interrupt arrives") Reviewed-by: Hans de Goede <hdegoede(a)redhat.com> Signed-off-by: Ricardo Ribalda <ribalda(a)chromium.org> Reviewed-by: Laurent Pinchart <laurent.pinchart(a)ideasonboard.com> Link: https://lore.kernel.org/r/20241203-uvc-fix-async-v6-3-26c867231118@chromium… Signed-off-by: Laurent Pinchart <laurent.pinchart(a)ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei(a)kernel.org> diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c index b05b84887e51..4837d8df9c03 100644 --- a/drivers/media/usb/uvc/uvc_ctrl.c +++ b/drivers/media/usb/uvc/uvc_ctrl.c @@ -1579,6 +1579,40 @@ static void uvc_ctrl_send_slave_event(struct uvc_video_chain *chain, uvc_ctrl_send_event(chain, handle, ctrl, mapping, val, changes); } +static void uvc_ctrl_set_handle(struct uvc_fh *handle, struct uvc_control *ctrl, + struct uvc_fh *new_handle) +{ + lockdep_assert_held(&handle->chain->ctrl_mutex); + + if (new_handle) { + if (ctrl->handle) + dev_warn_ratelimited(&handle->stream->dev->udev->dev, + "UVC non compliance: Setting an async control with a pending operation."); + + if (new_handle == ctrl->handle) + return; + + if (ctrl->handle) { + WARN_ON(!ctrl->handle->pending_async_ctrls); + if (ctrl->handle->pending_async_ctrls) + ctrl->handle->pending_async_ctrls--; + } + + ctrl->handle = new_handle; + handle->pending_async_ctrls++; + return; + } + + /* Cannot clear the handle for a control not owned by us.*/ + if (WARN_ON(ctrl->handle != handle)) + return; + + ctrl->handle = NULL; + if (WARN_ON(!handle->pending_async_ctrls)) + return; + handle->pending_async_ctrls--; +} + void uvc_ctrl_status_event(struct uvc_video_chain *chain, struct uvc_control *ctrl, const u8 *data) { @@ -1589,7 +1623,8 @@ void uvc_ctrl_status_event(struct uvc_video_chain *chain, mutex_lock(&chain->ctrl_mutex); handle = ctrl->handle; - ctrl->handle = NULL; + if (handle) + uvc_ctrl_set_handle(handle, ctrl, NULL); list_for_each_entry(mapping, &ctrl->info.mappings, list) { s32 value = __uvc_ctrl_get_value(mapping, data); @@ -1863,7 +1898,7 @@ static int uvc_ctrl_commit_entity(struct uvc_device *dev, if (!rollback && handle && ctrl->info.flags & UVC_CTRL_FLAG_ASYNCHRONOUS) - ctrl->handle = handle; + uvc_ctrl_set_handle(handle, ctrl, handle); } return 0; @@ -2772,6 +2807,26 @@ int uvc_ctrl_init_device(struct uvc_device *dev) return 0; } +void uvc_ctrl_cleanup_fh(struct uvc_fh *handle) +{ + struct uvc_entity *entity; + + guard(mutex)(&handle->chain->ctrl_mutex); + + if (!handle->pending_async_ctrls) + return; + + list_for_each_entry(entity, &handle->chain->dev->entities, list) { + for (unsigned int i = 0; i < entity->ncontrols; ++i) { + if (entity->controls[i].handle != handle) + continue; + uvc_ctrl_set_handle(handle, &entity->controls[i], NULL); + } + } + + WARN_ON(handle->pending_async_ctrls); +} + /* * Cleanup device controls. */ diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c index dee6feeba274..93c6cdb23881 100644 --- a/drivers/media/usb/uvc/uvc_v4l2.c +++ b/drivers/media/usb/uvc/uvc_v4l2.c @@ -671,6 +671,8 @@ static int uvc_v4l2_release(struct file *file) uvc_dbg(stream->dev, CALLS, "%s\n", __func__); + uvc_ctrl_cleanup_fh(handle); + /* Only free resources if this is a privileged handle. */ if (uvc_has_privileges(handle)) uvc_queue_release(&stream->queue); diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h index 965a789ed03e..5690cfd61e23 100644 --- a/drivers/media/usb/uvc/uvcvideo.h +++ b/drivers/media/usb/uvc/uvcvideo.h @@ -338,7 +338,11 @@ struct uvc_video_chain { struct uvc_entity *processing; /* Processing unit */ struct uvc_entity *selector; /* Selector unit */ - struct mutex ctrl_mutex; /* Protects ctrl.info */ + struct mutex ctrl_mutex; /* + * Protects ctrl.info, + * ctrl.handle and + * uvc_fh.pending_async_ctrls + */ struct v4l2_prio_state prio; /* V4L2 priority state */ u32 caps; /* V4L2 chain-wide caps */ @@ -613,6 +617,7 @@ struct uvc_fh { struct uvc_video_chain *chain; struct uvc_streaming *stream; enum uvc_handle_state state; + unsigned int pending_async_ctrls; }; struct uvc_driver { @@ -798,6 +803,8 @@ int uvc_ctrl_is_accessible(struct uvc_video_chain *chain, u32 v4l2_id, int uvc_xu_ctrl_query(struct uvc_video_chain *chain, struct uvc_xu_control_query *xqry); +void uvc_ctrl_cleanup_fh(struct uvc_fh *handle); + /* Utility functions */ struct usb_host_endpoint *uvc_find_endpoint(struct usb_host_interface *alts, u8 epaddr);

2 weeks, 1 day

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