CVE-2025-21832 (GCVE-0-2025-21832)

Vulnerability from cvelistv5 – Published: 2025-03-06 16:22 – Updated: 2025-11-03 21:00
VLAI?
Title
block: don't revert iter for -EIOCBQUEUED
Summary
In the Linux kernel, the following vulnerability has been resolved: block: don't revert iter for -EIOCBQUEUED blkdev_read_iter() has a few odd checks, like gating the position and count adjustment on whether or not the result is bigger-than-or-equal to zero (where bigger than makes more sense), and not checking the return value of blkdev_direct_IO() before doing an iov_iter_revert(). The latter can lead to attempting to revert with a negative value, which when passed to iov_iter_revert() as an unsigned value will lead to throwing a WARN_ON() because unroll is bigger than MAX_RW_COUNT. Be sane and don't revert for -EIOCBQUEUED, like what is done in other spots.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 3e1f941dd9f33776b3df4e30f741fe445ff773f3 , < 6c26619effb1b4cb7d20b4e666ab8f71f6a53ccb (git)
Affected: 3e1f941dd9f33776b3df4e30f741fe445ff773f3 , < 84671b0630ccb46ae9f1f99a45c7d63ffcd6a474 (git)
Affected: 3e1f941dd9f33776b3df4e30f741fe445ff773f3 , < 68f16d3034a06661245ecd22f0d586a8b4e7c473 (git)
Affected: 3e1f941dd9f33776b3df4e30f741fe445ff773f3 , < a58f136bad29f9ae721a29d98c042fddbee22f77 (git)
Affected: 3e1f941dd9f33776b3df4e30f741fe445ff773f3 , < b13ee668e8280ca5b07f8ce2846b9957a8a10853 (git)
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    Linux Linux Affected: 5.17
Unaffected: 0 , < 5.17 (semver)
Unaffected: 6.1.129 , ≤ 6.1.* (semver)
Unaffected: 6.6.78 , ≤ 6.6.* (semver)
Unaffected: 6.12.14 , ≤ 6.12.* (semver)
Unaffected: 6.13.3 , ≤ 6.13.* (semver)
Unaffected: 6.14 , ≤ * (original_commit_for_fix)
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