CVE-2024-44963 (GCVE-0-2024-44963)

Vulnerability from cvelistv5 – Published: 2024-09-04 18:36 – Updated: 2026-01-05 10:52
VLAI?
Title
btrfs: do not BUG_ON() when freeing tree block after error
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: fb235dc06fac9eaa4408ade9c8b20d45d63c89b7 , < 22d907bcd283d69d5e60497fc0d51969545c583b (git)
Affected: fb235dc06fac9eaa4408ade9c8b20d45d63c89b7 , < 98251cd60b4d702a8a81de442ab621e83a3fb24f (git)
Affected: fb235dc06fac9eaa4408ade9c8b20d45d63c89b7 , < bb3868033a4cccff7be57e9145f2117cbdc91c11 (git)
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    Linux Linux Affected: 4.11
Unaffected: 0 , < 4.11 (semver)
Unaffected: 6.6.64 , ≤ 6.6.* (semver)
Unaffected: 6.10.5 , ≤ 6.10.* (semver)
Unaffected: 6.11 , ≤ * (original_commit_for_fix)
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