pds_core: fix deadlock between reset thread and remove

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Summary

CVECVE-2026-68319
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-10 13:20:21 UTC
Updated2026-08-17 05:18:34 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: pds_core: fix deadlock between reset thread and remove pci_reset_function() acquires device_lock before performing the reset. pdsc_remove() is called by the PCI core with device_lock already held. If pdsc_pci_reset_thread() is running when pdsc_remove() is called, destroy_workqueue() will block waiting for the work to complete, while the work is blocked waiting for device_lock - deadlock. Use pci_try_reset_function() which uses pci_dev_trylock() internally. This acquires both the device lock and the PCI config access lock without blocking - if either lock is contended, it returns -EAGAIN immediately. This avoids the deadlock while also ensuring proper config space access serialization during the reset. The pci_dev_get/put calls are also removed as they were unnecessary - the driver-owned workqueue is destroyed in pdsc_remove(), guaranteeing the work completes before remove returns. The PCI core holds its reference to pci_dev throughout the entire unbind sequence.

Risk And Classification

EPSS: 0.001680000 probability, percentile 0.064730000 (date 2026-08-17)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 81665adf25d28a00a986533f1d3a5df76b79cad9 90d9f3ef28843e6c35149324b8eefb427a7435c2 git Not specified
CNA Linux Linux affected 81665adf25d28a00a986533f1d3a5df76b79cad9 19ef775c91c6bf4bd2b60f6616f4e28b621cdd6a git Not specified
CNA Linux Linux affected 81665adf25d28a00a986533f1d3a5df76b79cad9 54f905821f26d385fba407a920b51f0a752c76dc git Not specified
CNA Linux Linux affected 81665adf25d28a00a986533f1d3a5df76b79cad9 ab0eec0ff0a421737a37f510ceab5c6ea59cd05a git Not specified
CNA Linux Linux affected 38407914d48273d7f8ab765b9243658afe1c3ab6 git Not specified
CNA Linux Linux affected 6.8.7 6.9 semver Not specified
CNA Linux Linux affected 6.9 Not specified
CNA Linux Linux unaffected 6.9 semver Not specified
CNA Linux Linux unaffected 6.12.101 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.42 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.6 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/54f905821f26d385fba407a920b51f0a752c76dc 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ab0eec0ff0a421737a37f510ceab5c6ea59cd05a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/19ef775c91c6bf4bd2b60f6616f4e28b621cdd6a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/90d9f3ef28843e6c35149324b8eefb427a7435c2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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