md/raid1,raid10: fix deadlock in read error recovery path

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Summary

CVECVE-2026-74375
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 06:22:39 UTC
Updated2026-08-15 06:22:39 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: md/raid1,raid10: fix deadlock in read error recovery path raid1d and raid10d may resubmit a split md cloned bio while handling a read error. In this case, resubmitting the bio can lead to a deadlock if the array is suspended before md_handle_request() acquires an active_io reference via percpu_ref_tryget_live(). Since the cloned bio already holds an active_io reference, trying to acquire another reference via percpu_ref_tryget_live() can lead to a deadlock while the array is suspended. Fix this by using percpu_ref_get() for md cloned bios.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected bb2a9acefaf9ce5bbc1e70f407e34599233d0243 38777f014c37972868f1733a651c85288bb8a757 git Not specified
CNA Linux Linux affected bb2a9acefaf9ce5bbc1e70f407e34599233d0243 7b15c24f805339a585cfe7d72f446b7e88b9bcc0 git Not specified
CNA Linux Linux affected 6.6 Not specified
CNA Linux Linux unaffected 6.6 semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/7b15c24f805339a585cfe7d72f446b7e88b9bcc0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/38777f014c37972868f1733a651c85288bb8a757 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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