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Vulnerability Change Records for CVE-2024-44963

Change History

New CVE Received by NIST 9/04/2024 3:15:30 PM

Action Type Old Value New Value
Added 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.
Added Reference

								
							
							
						
kernel.org https://git.kernel.org/stable/c/98251cd60b4d702a8a81de442ab621e83a3fb24f [No types assigned]
Added Reference

								
							
							
						
kernel.org https://git.kernel.org/stable/c/bb3868033a4cccff7be57e9145f2117cbdc91c11 [No types assigned]