CVE-2024-44963 | THREATINT

Description

In the Linux kernel, the following vulnerability has been resolved: btrfs: do not BUG_ON() when freeing tree block after error When freeing a tree block, at btrfs_free_tree_block(), if we fail to create a delayed reference we don't deal with the error and just do a BUG_ON(). The error most likely to happen is -ENOMEM, and we have a comment mentioning that only -ENOMEM can happen, but that is not true, because in case qgroups are enabled any error returned from btrfs_qgroup_trace_extent_post() (can be -EUCLEAN or anything returned from btrfs_search_slot() for example) can be propagated back to btrfs_free_tree_block(). So stop doing a BUG_ON() and return the error to the callers and make them abort the transaction to prevent leaking space. Syzbot was triggering this, likely due to memory allocation failure injection.

PUBLISHED Reserved 2024-08-21 | Published 2024-09-04 | Updated 2025-05-04 | Assigner Linux

Product status

Default status

unaffected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 22d907bcd283d69d5e60497fc0d51969545c583b

affected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 98251cd60b4d702a8a81de442ab621e83a3fb24f

affected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before bb3868033a4cccff7be57e9145f2117cbdc91c11

affected

Default status

affected

6.6.64 (semver)

unaffected

6.10.5 (semver)

unaffected

6.11 (original_commit_for_fix)

unaffected

References

git.kernel.org/...c/22d907bcd283d69d5e60497fc0d51969545c583b

git.kernel.org/...c/98251cd60b4d702a8a81de442ab621e83a3fb24f

git.kernel.org/...c/bb3868033a4cccff7be57e9145f2117cbdc91c11

cve.org (CVE-2024-44963)

nvd.nist.gov (CVE-2024-44963)

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