block: mark GFP_NOIO around sysfs ->store()

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Summary

CVECVE-2025-21817
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-02-27 20:16:04 UTC
Updated2026-07-18 16:17:12 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: block: mark GFP_NOIO around sysfs ->store() sysfs ->store is called with queue freezed, meantime we have several ->store() callbacks(update_nr_requests, wbt, scheduler) to allocate memory with GFP_KERNEL which may run into direct reclaim code path, then potential deadlock can be caused. Fix the issue by marking NOIO around sysfs ->store()

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem Types: CWE-667

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel 6.13.2 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 8985da5481562e96b95e94ed8e5cc9b6565eb82b 2566ce907e5d5db8a039647208e029ce559baa31 git Not specified
CNA Linux Linux affected c99f66e4084a62a2cc401c4704a84328aeddc9ec 7c0be4ead1f8f5f8be0803f347de0de81e3b8e1c git Not specified
CNA Linux Linux affected 1645cd7fd42c236c952e9228badcac4fea1829ea git Not specified
CNA Linux Linux affected 6.12.96 6.13 semver Not specified
CNA Linux Linux affected 6.13.2 6.13.3 semver Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/2566ce907e5d5db8a039647208e029ce559baa31 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/7c0be4ead1f8f5f8be0803f347de0de81e3b8e1c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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