Btrfs: do error checking in btrfs_del_csums
Got a report of a box panicing because we got a NULL eb in read_extent_buffer.
His fs was borked and btrfs_search_path returned EIO, but we don't check for
errors so the box paniced. Yes I know this will just make something higher up
the stack panic, but that's a problem for future Josef. Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c
index d0bc726..4f19a3e 100644
--- a/fs/btrfs/file-item.c
+++ b/fs/btrfs/file-item.c
@@ -550,7 +550,10 @@
if (path->slots[0] == 0)
goto out;
path->slots[0]--;
+ } else if (ret < 0) {
+ goto out;
}
+
leaf = path->nodes[0];
btrfs_item_key_to_cpu(leaf, &key, path->slots[0]);