md: wake raid456 reshape waiters before suspend

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Summary

CVECVE-2026-53123
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-24 17:17:26 UTC
Updated2026-06-24 17:17:26 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: md: wake raid456 reshape waiters before suspend During raid456 reshape, direct IO across the reshape position can sleep in raid5_make_request() waiting for reshape progress while still holding an active_io reference. If userspace then freezes reshape and writes md/suspend_lo or md/suspend_hi, mddev_suspend() kills active_io and waits for all in-flight IO to drain. This can deadlock: the IO needs reshape progress to continue, but the reshape thread is already frozen, so the active_io reference is never dropped and suspend never completes. raid5_prepare_suspend() already wakes wait_for_reshape for dm-raid. Do the same for normal md suspend when reshape is already interrupted, so waiting raid456 IO can abort, drop its reference, and let suspend finish. The mdadm test tests/25raid456-reshape-deadlock reproduces the hang.

Risk And Classification

EPSS: 0.001710000 probability, percentile 0.067770000 (date 2026-06-29)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 714d20150ed85811193ae07a494d91f9927c590f 8b6a72420821e6da2cab6a69d5233500d2698b93 git Not specified
CNA Linux Linux affected 714d20150ed85811193ae07a494d91f9927c590f ff6b93410192b812d73cc54062529715b2dc849f git Not specified
CNA Linux Linux affected 714d20150ed85811193ae07a494d91f9927c590f 8ae3e14d7f3df58f7f49c02d74344e3dcd5f84f0 git Not specified
CNA Linux Linux affected 714d20150ed85811193ae07a494d91f9927c590f cf86bb53b9c92354904a328e947a05ffbfdd1840 git Not specified
CNA Linux Linux affected 6.7 Not specified
CNA Linux Linux unaffected 6.7 semver Not specified
CNA Linux Linux unaffected 6.12.91 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.33 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.10 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/ff6b93410192b812d73cc54062529715b2dc849f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8ae3e14d7f3df58f7f49c02d74344e3dcd5f84f0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8b6a72420821e6da2cab6a69d5233500d2698b93 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/cf86bb53b9c92354904a328e947a05ffbfdd1840 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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