CVE-2025-22072 (GCVE-0-2025-22072)

Vulnerability from cvelistv5 – Published: 2025-04-16 14:12 – Updated: 2025-11-03 19:41
VLAI?
Title
spufs: fix gang directory lifetimes
Summary
In the Linux kernel, the following vulnerability has been resolved: spufs: fix gang directory lifetimes prior to "[POWERPC] spufs: Fix gang destroy leaks" we used to have a problem with gang lifetimes - creation of a gang returns opened gang directory, which normally gets removed when that gets closed, but if somebody has created a context belonging to that gang and kept it alive until the gang got closed, removal failed and we ended up with a leak. Unfortunately, it had been fixed the wrong way. Dentry of gang directory was no longer pinned, and rmdir on close was gone. One problem was that failure of open kept calling simple_rmdir() as cleanup, which meant an unbalanced dput(). Another bug was in the success case - gang creation incremented link count on root directory, but that was no longer undone when gang got destroyed. Fix consists of * reverting the commit in question * adding a counter to gang, protected by ->i_rwsem of gang directory inode. * having it set to 1 at creation time, dropped in both spufs_dir_close() and spufs_gang_close() and bumped in spufs_create_context(), provided that it's not 0. * using simple_recursive_removal() to take the gang directory out when counter reaches zero.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 877907d37da9694a34adc9dc3e2ce09400148cb5 , < 880e7b3da2e765c1f90c94c0539be039e96c7062 (git)
Affected: 877907d37da9694a34adc9dc3e2ce09400148cb5 , < 324f280806aab28ef757aecc18df419676c10ef8 (git)
Affected: 877907d37da9694a34adc9dc3e2ce09400148cb5 , < 029d8c711f5e5fe8cf63e8a4a1a140a06e224e45 (git)
Affected: 877907d37da9694a34adc9dc3e2ce09400148cb5 , < 903733782f3ae28a2f7fe4dfb47c7fe3e079a528 (git)
Affected: 877907d37da9694a34adc9dc3e2ce09400148cb5 , < fc646a6c6d14b5d581f162a7e32999f789e3a3ac (git)
Affected: 877907d37da9694a34adc9dc3e2ce09400148cb5 , < c134deabf4784e155d360744d4a6a835b9de4dd4 (git)
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    Linux Linux Affected: 2.6.22
Unaffected: 0 , < 2.6.22 (semver)
Unaffected: 6.1.134 , ≤ 6.1.* (semver)
Unaffected: 6.6.87 , ≤ 6.6.* (semver)
Unaffected: 6.12.23 , ≤ 6.12.* (semver)
Unaffected: 6.13.11 , ≤ 6.13.* (semver)
Unaffected: 6.14.2 , ≤ 6.14.* (semver)
Unaffected: 6.15 , ≤ * (original_commit_for_fix)
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