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bcachefs: Fix overflow in journal_replay_entry_early 

If filesystem on disk was used by a version with a larger BCH_DATA_NR
thas the currently running version, we don't want this to cause a buffer
overrun.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
This commit is contained in:
Kent Overstreet 2021-06-10 23:51:09 -04:00 committed by Kent Overstreet
parent 7ed158f294
commit 90d22a660a
1 changed files with 1 additions and 1 deletions
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2
fs/bcachefs/recovery.c
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@ -725,7 +725,7 @@ static int journal_replay_entry_early(struct bch_fs *c,
ca->usage_base->buckets_ec = le64_to_cpu(u->buckets_ec);
ca->usage_base->buckets_unavailable = le64_to_cpu(u->buckets_unavailable);
for (i = 0; i < nr_types; i++) {
for (i = 0; i < min_t(unsigned, nr_types, BCH_DATA_NR); i++) {
ca->usage_base->d[i].buckets = le64_to_cpu(u->d[i].buckets);
ca->usage_base->d[i].sectors = le64_to_cpu(u->d[i].sectors);
ca->usage_base->d[i].fragmented = le64_to_cpu(u->d[i].fragmented);