Description
In the Linux kernel, the following vulnerability has been resolved: btrfs: fix the possible bioc_list memory leak during error There are two possible ways to leak bioc memory on btrfs_ordered_extent::bioc_list: - An error occurred for btrfs_insert_one_raid_extent() Then the function btrfs_insert_raid_extent() immediately return without freeing any bioc in the bioc_list. - An ordered extent hit an IO error In that case the ordered extent will have BTRFS_ORDERED_IOERR set, and skip the call on btrfs_insert_raid_extent() completely. Fix the problem by: - Introduce a new helper, btrfs_cleanup_ordered_bioc_list() Which will remove all bioc from the bioc_list, and release the bioc. - Call the above helper for btrfs_insert_raid_extent() So that the cleanup helper is always called no matter what. - Call the above helper for btrfs_finish_one_ordered() This is called just before the final release on the ordered extent. This was reported by Sashiko when reviewing another patch.
Affected products
linux: linux kernel
References5
- git.kernel.org/stable/c/1b4d4e890c2c85d0f6365b5a08c48b4bbf85deb0 Patch
- git.kernel.org/stable/c/83f0c973cffb184d019390ffdb5d31de5c85bc61 Patch
- git.kernel.org/stable/c/afbe73778338e6d1ac8c4486fbdf33f0cc1f2624 Patch
- git.kernel.org/stable/c/bb4da45766d16503821f167054db76b735d89e94 Patch
- git.kernel.org/stable/c/d043c43d2b4ebcd75ee7f907948ef2847306d6b2 Patch
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 2 · as of 9 November 2026
- CWE
- CWE-401
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