mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/kdave/btrfs-progs.git
synced 2024-11-15 00:04:23 +08:00
btrfs-progs: Use more strict check to read out tree root
Fuzzed image bko-156811-bad-parent-ref-qgroup-verify.raw causes qgroup to report -ENOMEM. But the fact is, such image is heavily damaged so there is no valid root item for the extent tree. Normal extent tree key in root tree should be (EXTENT_TREE ROOT_ITEM 0), while in that fuzzed image, we got (EXTENT_TREE EXXTENT_DATA SOME_NUMBER). It's btrfs_find_last_root() that only checks the objectid, not caring about the key type leading to such problem. Fix it by doing extra check on key type. Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com> [ edit changelog ] Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
parent
528ba342ac
commit
d00a875ed2
@ -51,7 +51,8 @@ int btrfs_find_last_root(struct btrfs_root *root, u64 objectid,
|
||||
l = path->nodes[0];
|
||||
slot = path->slots[0] - 1;
|
||||
btrfs_item_key_to_cpu(l, &found_key, slot);
|
||||
if (found_key.objectid != objectid) {
|
||||
if (found_key.type != BTRFS_ROOT_ITEM_KEY ||
|
||||
found_key.objectid != objectid) {
|
||||
ret = -ENOENT;
|
||||
goto out;
|
||||
}
|
||||
|
Loading…
Reference in New Issue
Block a user