net: dsa: realtek: use gpiod_set_value_cansleep for reset GPIO

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-80999
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-11 20:19:07 UTC
Updated2026-09-11 20:19:07 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: net: dsa: realtek: use gpiod_set_value_cansleep for reset GPIO rtl83xx_reset_assert() and rtl83xx_reset_deassert() are only called from the probe path, which may sleep and is not timing-critical. When the reset GPIO is provided by a sleeping controller such as an I2C I/O expander, gpiod_set_value() warns: WARNING: drivers/gpio/gpiolib.c:4030 at gpiod_set_value+0x44/0x80, CPU#1: kworker/u16:4/61 Hardware name: B&O MAP CA33 Rev f (UNKNOWN) (DT) Workqueue: events_unbound deferred_probe_work_func pc : gpiod_set_value+0x44/0x80 lr : rtl83xx_probe+0x1d8/0x3a0 Call trace: gpiod_set_value+0x44/0x80 (P) rtl83xx_probe+0x1d8/0x3a0 realtek_mdio_probe+0x24/0xa0 mdio_probe+0x38/0x78 really_probe+0xc4/0x3e0 __driver_probe_device+0x15c/0x1b8 driver_probe_device+0xb4/0x120 __device_attach_driver+0xb8/0x1a0 bus_for_each_drv+0x88/0xf0 __device_attach+0xa0/0x1d8 device_initial_probe+0x54/0x68 bus_probe_device+0x38/0xa0 deferred_probe_work_func+0xb8/0x120 process_one_work+0x184/0x4e8 worker_thread+0x188/0x308 kthread+0x130/0x150 ret_from_fork+0x10/0x20 Switch both helpers to gpiod_set_value_cansleep() so such a reset GPIO can be used without triggering the warning. The reset GPIO has been driven with the non-sleeping gpiod_set_value() since the driver was added in v4.19. The call has since been refactored across several files - from realtek-smi.c / realtek-mdio.c into the common rtl83xx.c module and then into the rtl83xx_reset_assert() and rtl83xx_reset_deassert() helpers (both in v6.9). This patch therefore applies as-is only to kernels that carry those helpers (v6.9+); older stable kernels need the same gpiod_set_value_cansleep() conversion at the corresponding open-coded call sites.

Risk And Classification

EPSS: 0.002000000 probability, percentile 0.099370000 (date 2026-09-13)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected d8652956cf37c5caa8c19e0b99ce5ca235c6d5de c32cf5292a0dd70c4afc138b4dc45743a190cd5a git Not specified
CNA Linux Linux affected d8652956cf37c5caa8c19e0b99ce5ca235c6d5de f71087e7c63aa3e99bf65d7ddf91eb4fd3545778 git Not specified
CNA Linux Linux affected d8652956cf37c5caa8c19e0b99ce5ca235c6d5de 1610a8c2b93e815e3dc8643a2a69ab1c37975a6a git Not specified
CNA Linux Linux affected d8652956cf37c5caa8c19e0b99ce5ca235c6d5de fb58b6a696b30bcbfbe0cfc0a91b19c816a955fc git Not specified
CNA Linux Linux affected 4.19 Not specified
CNA Linux Linux unaffected 4.19 semver Not specified
CNA Linux Linux unaffected 6.12.109 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.50 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.4 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/f71087e7c63aa3e99bf65d7ddf91eb4fd3545778 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/fb58b6a696b30bcbfbe0cfc0a91b19c816a955fc 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1610a8c2b93e815e3dc8643a2a69ab1c37975a6a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c32cf5292a0dd70c4afc138b4dc45743a190cd5a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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