CVE-2024-44963 (GCVE-0-2024-44963)
Vulnerability from cvelistv5
Published
2024-09-04 18:36
Modified
2026-01-05 10:52
Severity ?
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: fb235dc06fac9eaa4408ade9c8b20d45d63c89b7
Version: fb235dc06fac9eaa4408ade9c8b20d45d63c89b7
Version: fb235dc06fac9eaa4408ade9c8b20d45d63c89b7
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