CVE-2024-44963

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.

Reserved 2024-08-21 | Published 2024-09-04 | Updated 2024-11-05 | Assigner Linux

Product status

Default status
unaffected

1da177e4c3f4 before 98251cd60b4d
affected

1da177e4c3f4 before bb3868033a4c
affected

Default status
affected

6.10.5
unaffected

6.11
unaffected

References

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

git.kernel.org/stable/c/bb3868033a4cccff7be57e9145f2117cbdc91c11

cve.org (CVE-2024-44963)

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

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