md/raid1,raid10: fix bio accounting for split md cloned bios

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Summary

CVECVE-2026-74373
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 bio accounting for split md cloned bios Use md_cloned_bio() to control bio accounting instead of relying on r1bio_existed in raid1 or the io_accounting flag in raid10. The previous logic does not reliably reflect whether a bio is an md cloned bio. When a failed bio is split and resubmitted via bio_submit_split_bioset() on the error path, this can lead to either double accounting for md cloned bios, or missing accounting for bios returned from bio_submit_split_bioset() Fix this by using md_cloned_bio() to detect md cloned bios and skip accounting accordingly.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected bb2a9acefaf9ce5bbc1e70f407e34599233d0243 bb8d7ea74206b419aa05d7773a15a923b668c9f0 git Not specified
CNA Linux Linux affected bb2a9acefaf9ce5bbc1e70f407e34599233d0243 ba976e3501111d11c550848b3b7341a73035f582 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/ba976e3501111d11c550848b3b7341a73035f582 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/bb8d7ea74206b419aa05d7773a15a923b668c9f0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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