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bcachefs: Fix array overrun with unknown btree roots

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Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2019-06-24 18:11:35 -04:00 committed by Kent Overstreet
parent f707e3d8f4
commit 2ded276b7e
1 changed files with 9 additions and 1 deletions
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10
fs/bcachefs/recovery.c
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@ -379,7 +379,15 @@ static int journal_replay_entry_early(struct bch_fs *c,
switch (entry->type) {
case BCH_JSET_ENTRY_btree_root: {
struct btree_root *r = &c->btree_roots[entry->btree_id];
struct btree_root *r;
if (entry->btree_id >= BTREE_ID_NR) {
bch_err(c, "filesystem has unknown btree type %u",
entry->btree_id);
return -EINVAL;
}
r = &c->btree_roots[entry->btree_id];
if (entry->u64s) {
r->level = entry->level;