CVE-2024-44963 - "Btrfs Memory Leak BUG Abuse Vulnerability"

CVE ID : CVE-2024-44963
Published : Sept. 4, 2024, 7:15 p.m. | 24 minutes ago
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.
Severity: 0.0 | NA
Visit the link for more details, such as CVSS details, affected products, timeline, and more...