4.20-stable review patch. If anyone has any objections, please let me know.
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[ Upstream commit 1690dd41e0cb1dade80850ed8a3eb0121b96d22f ]
In the error handling block, err holds the return value of either btrfs_del_root_ref() or btrfs_del_inode_ref() but it hasn't been checked since it's introduction with commit fe66a05a0679 (Btrfs: improve error handling for btrfs_insert_dir_item callers) in 2012.
If the error handling in the error handling fails, there's not much left to do and the abort either happened earlier in the callees or is necessary here.
So if one of btrfs_del_root_ref() or btrfs_del_inode_ref() failed, abort the transaction, but still return the original code of the failure stored in 'ret' as this will be reported to the user.
Signed-off-by: Johannes Thumshirn jthumshirn@suse.de Reviewed-by: David Sterba dsterba@suse.com Signed-off-by: David Sterba dsterba@suse.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/btrfs/inode.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 02772f8823cf..561bffcb56a0 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -6419,14 +6419,19 @@ fail_dir_item: err = btrfs_del_root_ref(trans, key.objectid, root->root_key.objectid, parent_ino, &local_index, name, name_len); - + if (err) + btrfs_abort_transaction(trans, err); } else if (add_backref) { u64 local_index; int err;
err = btrfs_del_inode_ref(trans, root, name, name_len, ino, parent_ino, &local_index); + if (err) + btrfs_abort_transaction(trans, err); } + + /* Return the original error code */ return ret; }