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bcachefs: Fix null ptr deref in bch2_snapshot_tree_oldest_subvol()

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Reported-by: syzbot+baee8591f336cab0958b@syzkaller.appspotmail.com
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2025-04-17 22:38:14 -04:00
parent 4c0d2c67ac
commit aa6a591f0f
1 changed files with 1 additions and 1 deletions
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2
fs/bcachefs/snapshot.c
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@ -396,7 +396,7 @@ u32 bch2_snapshot_tree_oldest_subvol(struct bch_fs *c, u32 snapshot_root)
u32 subvol = 0, s;
rcu_read_lock();
while (id) {
while (id && bch2_snapshot_exists(c, id)) {
s = snapshot_t(c, id)->subvol;
if (s && (!subvol || s < subvol))