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bcachefs: Fix check_snapshot() memcpy

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check_snapshot() copies the bch_snapshot to a temporary to easily handle
older versions that don't have all the fields of the current version,
but it lacked a min() to correctly handle keys newer and larger than the
current version.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2024-02-24 01:18:45 -05:00
parent 097471f9e4
commit c4333eb541
1 changed files with 1 additions and 1 deletions
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2
fs/bcachefs/snapshot.c
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@ -728,7 +728,7 @@ static int check_snapshot(struct btree_trans *trans,
return 0;
memset(&s, 0, sizeof(s));
memcpy(&s, k.v, bkey_val_bytes(k.k));
memcpy(&s, k.v, min(sizeof(s), bkey_val_bytes(k.k)));
id = le32_to_cpu(s.parent);
if (id) {