diff options
| author | Qu Wenruo <wqu@suse.com> | 2023-08-01 14:02:28 +0300 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2023-08-21 15:54:48 +0300 |
| commit | 7f72f50547b7af4ddf985b07fc56600a4deba281 (patch) | |
| tree | c340205bef47c2fe3ca9e594e1034a19abb06b88 | |
| parent | 76c5126e76696e61ced5d6e34441f857733741bf (diff) | |
| download | linux-7f72f50547b7af4ddf985b07fc56600a4deba281.tar.xz | |
btrfs: output extra debug info if we failed to find an inline backref
[BUG]
Syzbot reported several warning triggered inside
lookup_inline_extent_backref().
[CAUSE]
As usual, the reproducer doesn't reliably trigger locally here, but at
least we know the WARN_ON() is triggered when an inline backref can not
be found, and it can only be triggered when @insert is true. (I.e.
inserting a new inline backref, which means the backref should already
exist)
[ENHANCEMENT]
After the WARN_ON(), dump all the parameters and the extent tree
leaf to help debug.
Link: https://syzkaller.appspot.com/bug?extid=d6f9ff86c1d804ba2bc6
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
| -rw-r--r-- | fs/btrfs/extent-tree.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index e0508114f0bd..105f528382e7 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -848,6 +848,11 @@ again: err = -ENOENT; goto out; } else if (WARN_ON(ret)) { + btrfs_print_leaf(path->nodes[0]); + btrfs_err(fs_info, +"extent item not found for insert, bytenr %llu num_bytes %llu parent %llu root_objectid %llu owner %llu offset %llu", + bytenr, num_bytes, parent, root_objectid, owner, + offset); err = -EIO; goto out; } |