Description
In the Linux kernel, the following vulnerability has been resolved: btrfs: do not BUG_ON() on ENOMEM when dropping extent items for a range If we get -ENOMEM while dropping file extent items in a given range, at btrfs_drop_extents(), due to failure to allocate memory when attempting to increment the reference count for an extent or drop the reference count, we handle it with a BUG_ON(). This is excessive, instead we can simply abort the transaction and return the error to the caller. In fact most callers of btrfs_drop_extents(), directly or indirectly, already abort the transaction if btrfs_drop_extents() returns any error. Also, we already have error paths at btrfs_drop_extents() that may return -ENOMEM and in those cases we abort the transaction, like for example anything that changes the b+tree may return -ENOMEM due to a failure to allocate a new extent buffer when COWing an existing extent buffer, such as a call to btrfs_duplicate_item() for example. So replace the BUG_ON() calls with proper logic to abort the transaction and return the error.
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
39279cc3d2704cfbf9c35dcb5bdd392159ae4625 to < 50f993da945074b2a069da099a0331b23a0c89a0affected39279cc3d2704cfbf9c35dcb5bdd392159ae4625 to < 7fbcb635c8fc927d139f3302babcf1b42c09265caffected39279cc3d2704cfbf9c35dcb5bdd392159ae4625 to < 1baf3370e2dc5e6bd1368348736189457dab2a27affected39279cc3d2704cfbf9c35dcb5bdd392159ae4625 to < 162d053e15fe985f754ef495a96eb3db970c43edaffected
Linux Linux
Default version status: affected
2.6.29affected0 to < 2.6.29unaffected5.15.86 to ≤ 5.15.*unaffected6.0.16 to ≤ 6.0.*unaffected6.1.2 to ≤ 6.1.*unaffected6.2 to ≤ *unaffected