diff options
| author | Piotr Zalewski <pZ010001011111@proton.me> | 2024-09-29 14:26:45 +0000 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2024-10-09 16:42:53 -0400 |
| commit | 0151d10a480da22d0c137f859645fdc79e10b551 (patch) | |
| tree | a57bc930b25a5153430b54e60a39b032d766abee /fs/bcachefs/btree_node_scan.c | |
| parent | 19773ec997201a45b3a1b5f1171897cba0f30bab (diff) | |
bcachefs: add check for btree id against max in try read node
Add check for read node's btree_id against BTREE_ID_NR_MAX in
try_read_btree_node to prevent triggering EBUG_ON condition in
bch2_btree_id_root[1].
[1] https://syzkaller.appspot.com/bug?extid=cf7b2215b5d70600ec00
Reported-by: syzbot+cf7b2215b5d70600ec00@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=cf7b2215b5d70600ec00
Fixes: 4409b8081d16 ("bcachefs: Repair pass for scanning for btree nodes")
Signed-off-by: Piotr Zalewski <pZ010001011111@proton.me>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'fs/bcachefs/btree_node_scan.c')
| -rw-r--r-- | fs/bcachefs/btree_node_scan.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/bcachefs/btree_node_scan.c b/fs/bcachefs/btree_node_scan.c index 1e694fedc5da..a7aedb134e9f 100644 --- a/fs/bcachefs/btree_node_scan.c +++ b/fs/bcachefs/btree_node_scan.c @@ -171,6 +171,9 @@ static void try_read_btree_node(struct find_btree_nodes *f, struct bch_dev *ca, if (BTREE_NODE_LEVEL(bn) >= BTREE_MAX_DEPTH) return; + if (BTREE_NODE_ID(bn) >= BTREE_ID_NR_MAX) + return; + rcu_read_lock(); struct found_btree_node n = { .btree_id = BTREE_NODE_ID(bn), |