This is a note to let you know that I've just added the patch titled
btrfs: abort transaction when sibling keys check fails for leaves
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
btrfs-abort-transaction-when-sibling-keys-check-fail.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 6ac92e5aa724b434414657914c518b77e8ebe89a
Author: Filipe Manana <fdmanana@xxxxxxxx>
Date: Wed Apr 26 11:51:35 2023 +0100
btrfs: abort transaction when sibling keys check fails for leaves
[ Upstream commit 9ae5afd02a03d4e22a17a9609b19400b77c36273 ]
If the sibling keys check fails before we move keys from one sibling
leaf to another, we are not aborting the transaction - we leave that to
some higher level caller of btrfs_search_slot() (or anything else that
uses it to insert items into a b+tree).
This means that the transaction abort will provide a stack trace that
omits the b+tree modification call chain. So change this to immediately
abort the transaction and therefore get a more useful stack trace that
shows us the call chain in the bt+tree modification code.
It's also important to immediately abort the transaction just in case
some higher level caller is not doing it, as this indicates a very
serious corruption and we should stop the possibility of doing further
damage.
Reviewed-by: Qu Wenruo <wqu@xxxxxxxx>
Signed-off-by: Filipe Manana <fdmanana@xxxxxxxx>
Reviewed-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index a31986ca9224e..1a19354382b2b 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -2907,6 +2907,7 @@ static int push_leaf_right(struct btrfs_trans_handle *trans, struct btrfs_root
if (check_sibling_keys(left, right)) {
ret = -EUCLEAN;
+ btrfs_abort_transaction(trans, ret);
btrfs_tree_unlock(right);
free_extent_buffer(right);
return ret;
@@ -3150,6 +3151,7 @@ static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root
if (check_sibling_keys(left, right)) {
ret = -EUCLEAN;
+ btrfs_abort_transaction(trans, ret);
goto out;
}
return __push_leaf_left(path, min_data_size,
