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bcachefs: Fix journal_iter list corruption

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Fix exiting an iterator that wasn't initialized.

Reported-by: syzbot+2f7c2225ed8a5cb24af1@syzkaller.appspotmail.com
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2024-11-28 15:10:24 -05:00
parent f11ca2ab18
commit 0184dfa3b8
1 changed files with 5 additions and 5 deletions
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10
fs/bcachefs/btree_update_interior.c
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@ -58,6 +58,10 @@ int bch2_btree_node_check_topology(struct btree_trans *trans, struct btree *b)
!bpos_eq(bkey_i_to_btree_ptr_v2(&b->key)->v.min_key,
b->data->min_key));
bch2_bkey_buf_init(&prev);
bkey_init(&prev.k->k);
bch2_btree_and_journal_iter_init_node_iter(trans, &iter, b);
if (b == btree_node_root(c, b)) {
if (!bpos_eq(b->data->min_key, POS_MIN)) {
printbuf_reset(&buf);
@ -77,11 +81,7 @@ int bch2_btree_node_check_topology(struct btree_trans *trans, struct btree *b)
}
if (!b->c.level)
return 0;
bch2_bkey_buf_init(&prev);
bkey_init(&prev.k->k);
bch2_btree_and_journal_iter_init_node_iter(trans, &iter, b);
goto out;
while ((k = bch2_btree_and_journal_iter_peek(&iter)).k) {
if (k.k->type != KEY_TYPE_btree_ptr_v2)