diff options
author | Kent Overstreet <kent.overstreet@linux.dev> | 2023-03-13 07:09:33 -0400 |
---|---|---|
committer | Kent Overstreet <kent.overstreet@linux.dev> | 2023-03-14 20:27:43 -0400 |
commit | d6f677d5d2dbc779dc443f010089828272c401a2 (patch) | |
tree | 382dc176db7006793c8977135784c2ebd1ed8ac7 | |
parent | 5f166b45106e065f8edddf683e780d53acb9f466 (diff) |
bcachefs: Mark new snapshots earlier in create path
This fixes a null ptr deref when creating new snapshots:
bch2_create_trans() will lookup the subvolume and find the _new_
snapshot in the BCH_CREATE_SUBVOL path that's being created in that
transaction.
We have to call bch2_mark_snapshot() earlier so that it's properly
initialized, instead of leaving it for transaction commit.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
-rw-r--r-- | fs/bcachefs/subvolume.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/fs/bcachefs/subvolume.c b/fs/bcachefs/subvolume.c index d76239654a89..bcc67c0f5dfc 100644 --- a/fs/bcachefs/subvolume.c +++ b/fs/bcachefs/subvolume.c @@ -513,7 +513,9 @@ int bch2_snapshot_node_create(struct btree_trans *trans, u32 parent, n->v.pad = 0; SET_BCH_SNAPSHOT_SUBVOL(&n->v, true); - ret = bch2_trans_update(trans, &iter, &n->k_i, 0); + ret = bch2_trans_update(trans, &iter, &n->k_i, 0) ?: + bch2_mark_snapshot(trans, BTREE_ID_snapshots, 0, + bkey_s_c_null, bkey_i_to_s_c(&n->k_i), 0); if (ret) goto err; @@ -540,7 +542,7 @@ int bch2_snapshot_node_create(struct btree_trans *trans, u32 parent, n->v.children[1] = cpu_to_le32(new_snapids[1]); n->v.subvol = 0; SET_BCH_SNAPSHOT_SUBVOL(&n->v, false); - ret = bch2_trans_update(trans, &iter, &n->k_i, 0); + ret = bch2_trans_update(trans, &iter, &n->k_i, 0); if (ret) goto err; } |