iomap: release the folio batch on iomap callback failures

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-90384
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-17 17:17:37 UTC
Updated2026-09-17 17:17:37 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: iomap: release the folio batch on iomap callback failures A sashiko review of an unrelated patch points out that the folio batch mechanism used for iomap zero range fails to release the batch in a couple error scenarios. If either calls to ->iomap_end() or ->iomap_begin() fail, the direct return paths bypass the batch cleanup. The ->iomap_end() case is not a practical issue at the moment because there is no user of the mechanism that returns an error from this path. The ->iomap_begin() case is theoretically possible because XFS can invoke the fill helper and error out at various points thereafter. This subtly complicates things because XFS does not transfer iomap_flags to the iomap data structure in the error path. To deal with both of these issues, first make sure to invoke the cleanup helper in the error path for either fs callback. Second, update the helper to clear the flag unconditionally and release the batch so long as it is populated. This more clearly delineates the purpose of the flag to control the I/O path and not necessarily the status of the fbatch, so add a comment around this as well.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 395ed1ef0012e1bb1e4050e84ba0173b3623112a 34470cc3a8e66751030d7b777dd18d9f2acb48e8 git Not specified
CNA Linux Linux affected 395ed1ef0012e1bb1e4050e84ba0173b3623112a 31e3d833d522746a93d135e8b465d16f8ad33453 git Not specified
CNA Linux Linux affected 6.19 Not specified
CNA Linux Linux unaffected 6.19 semver Not specified
CNA Linux Linux unaffected 7.2.6 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/31e3d833d522746a93d135e8b465d16f8ad33453 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/34470cc3a8e66751030d7b777dd18d9f2acb48e8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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