Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected fb235dc06fac9eaa4408ade9c8b20d45d63c89b7 before 22d907bcd283d69d5e60497fc0d51969545c583b; affected fb235dc06fac9eaa4408ade9c8b20d45d63c89b7 before 98251cd60b4d702a8a81de442ab621e83a3fb24f; affected fb235dc06fac9eaa4408ade9c8b20d45d63c89b7 before bb3868033a4cccff7be57e9145f2117cbdc91c11 |
| Linux / Linux | affected 4.11; unaffected 0 before 4.11; unaffected 6.6.64 through 6.6.*; unaffected 6.10.5 through 6.10.*; unaffected 6.11 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/22d907bcd283d69d5e60497fc0d51969545c583b
- https://git.kernel.org/stable/c/98251cd60b4d702a8a81de442ab621e83a3fb24f
- https://git.kernel.org/stable/c/bb3868033a4cccff7be57e9145f2117cbdc91c11
ADP enrichment
No English description supplied.
No references supplied.