btrfs: do not free data reservation in fallback from inline due to -ENOSPC

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Summary

CVECVE-2025-71269
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-03-18 18:16:22 UTC
Updated2026-04-11 13:16:36 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: btrfs: do not free data reservation in fallback from inline due to -ENOSPC If we fail to create an inline extent due to -ENOSPC, we will attempt to go through the normal COW path, reserve an extent, create an ordered extent, etc. However we were always freeing the reserved qgroup data, which is wrong since we will use data. Fix this by freeing the reserved qgroup data in __cow_file_range_inline() only if we are not doing the fallback (ret is <= 0).

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 94ed938aba557aa798acf496f09afb289b619fcd 3edd1f6c7c520536b62b2904807033597554dbac git Not specified
CNA Linux Linux affected 94ed938aba557aa798acf496f09afb289b619fcd 3a9fd45afadec1fbfec72057b9473d509fa8b68c git Not specified
CNA Linux Linux affected 94ed938aba557aa798acf496f09afb289b619fcd 0a1fbbd780f04d1b6cf48dd327c866ba937de1c4 git Not specified
CNA Linux Linux affected 94ed938aba557aa798acf496f09afb289b619fcd 6de3a371a8b9fd095198b1aa68c22cc10a4c6961 git Not specified
CNA Linux Linux affected 94ed938aba557aa798acf496f09afb289b619fcd f8da41de0bff9eb1d774a7253da0c9f637c4470a git Not specified
CNA Linux Linux affected 4.4 Not specified
CNA Linux Linux unaffected 4.4 semver Not specified
CNA Linux Linux unaffected 6.1.168 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.134 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.81 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.10 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/f8da41de0bff9eb1d774a7253da0c9f637c4470a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3a9fd45afadec1fbfec72057b9473d509fa8b68c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0a1fbbd780f04d1b6cf48dd327c866ba937de1c4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6de3a371a8b9fd095198b1aa68c22cc10a4c6961 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3edd1f6c7c520536b62b2904807033597554dbac 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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