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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
fb235dc06fac9eaa4408ade9c8b20d45d63c89b7 to < bfcef12f80b3a9bd6b09c7305679164e3307328aaffectedfb235dc06fac9eaa4408ade9c8b20d45d63c89b7 to < 22d907bcd283d69d5e60497fc0d51969545c583baffectedfb235dc06fac9eaa4408ade9c8b20d45d63c89b7 to < 98251cd60b4d702a8a81de442ab621e83a3fb24faffectedfb235dc06fac9eaa4408ade9c8b20d45d63c89b7 to < bb3868033a4cccff7be57e9145f2117cbdc91c11affected
Linux Linux
Default version status: affected
4.11affected0 to < 4.11unaffected6.1.191 to ≤ 6.1.*unaffected6.6.64 to ≤ 6.6.*unaffected6.10.5 to ≤ 6.10.*unaffected6.11 to ≤ *unaffected