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| author | Kent Overstreet <kent.overstreet@linux.dev> | 2024-02-24 01:18:45 -0500 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2024-02-24 20:47:47 -0500 |
| commit | c4333eb541b92d91be57f757dccf6d4368516746 (patch) | |
| tree | d18a2d02477c15b7ab2b036782e8233b29226cbf | |
| parent | 097471f9e458dbbe41e25394c1fb1ccd751f0bee (diff) | |
bcachefs: Fix check_snapshot() memcpy
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>
| -rw-r--r-- | fs/bcachefs/snapshot.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/bcachefs/snapshot.c b/fs/bcachefs/snapshot.c index 45f67e8b29eb..ac6ba04d5521 100644 --- a/fs/bcachefs/snapshot.c +++ b/fs/bcachefs/snapshot.c @@ -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) { |