This is a note to let you know that I've just added the patch titled
btrfs: replace BUG_ON() with error handling at update_ref_for_cow()
to the 6.1-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-replace-bug_on-with-error-handling-at-update_r.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 77019734ec825b126a810c13ea6f35933b73e9a6
Author: Filipe Manana <fdmanana@xxxxxxxx>
Date: Tue Jun 18 15:55:16 2024 +0100
btrfs: replace BUG_ON() with error handling at update_ref_for_cow()
[ Upstream commit b56329a782314fde5b61058e2a25097af7ccb675 ]
Instead of a BUG_ON() just return an error, log an error message and
abort the transaction in case we find an extent buffer belonging to the
relocation tree that doesn't have the full backref flag set. This is
unexpected and should never happen (save for bugs or a potential bad
memory).
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 e08688844f1e..66d1f34c3fc6 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -324,8 +324,16 @@ static noinline int update_ref_for_cow(struct btrfs_trans_handle *trans,
}
owner = btrfs_header_owner(buf);
- BUG_ON(owner == BTRFS_TREE_RELOC_OBJECTID &&
- !(flags & BTRFS_BLOCK_FLAG_FULL_BACKREF));
+ if (unlikely(owner == BTRFS_TREE_RELOC_OBJECTID &&
+ !(flags & BTRFS_BLOCK_FLAG_FULL_BACKREF))) {
+ btrfs_crit(fs_info,
+"found tree block at bytenr %llu level %d root %llu refs %llu flags %llx without full backref flag set",
+ buf->start, btrfs_header_level(buf),
+ btrfs_root_id(root), refs, flags);
+ ret = -EUCLEAN;
+ btrfs_abort_transaction(trans, ret);
+ return ret;
+ }
if (refs > 1) {
if ((owner == root->root_key.objectid ||
