Btrfs: hold trans_mutex when using btrfs_record_root_in_trans

btrfs_record_root_in_trans needs the trans_mutex held to make sure two
callers don't race to setup the root in a given transaction.  This adds
it to all the places that were missing it.

Signed-off-by: Yan Zheng <zheng.yan@oracle.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index cd86bffbdc9f..0a5d796c9f7e 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -5658,7 +5658,9 @@ static noinline int relocate_one_extent(struct btrfs_root *extent_root,
                         prev_block = block_start;
                 }
 
+                mutex_lock(&extent_root->fs_info->trans_mutex);
                 btrfs_record_root_in_trans(found_root);
+                mutex_unlock(&extent_root->fs_info->trans_mutex);
                 if (ref_path->owner_objectid >= BTRFS_FIRST_FREE_OBJECTID) {
                         /*
                          * try to update data extent references while