The two helper functions commit_cowonly_roots() and create_pending_snapshot() failed to check the return value from btrfs_cow_block(), which could at least in theory fail with -ENOSPC from btrfs_alloc_free_block(). This commit adds the missing checks.
Signed-off-by: Jan Schmidt <[email protected]> --- fs/btrfs/transaction.c | 6 ++++-- 1 files changed, 4 insertions(+), 2 deletions(-) diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index 04b77e3..cd220f2 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -718,7 +718,8 @@ static noinline int commit_cowonly_roots(struct btrfs_trans_handle *trans, BUG_ON(ret); eb = btrfs_lock_root_node(fs_info->tree_root); - btrfs_cow_block(trans, fs_info->tree_root, eb, NULL, 0, &eb); + ret = btrfs_cow_block(trans, fs_info->tree_root, eb, NULL, 0, &eb); + BUG_ON(ret); btrfs_tree_unlock(eb); free_extent_buffer(eb); @@ -949,7 +950,8 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans, btrfs_set_root_flags(new_root_item, root_flags); old = btrfs_lock_root_node(root); - btrfs_cow_block(trans, root, old, NULL, 0, &old); + ret = btrfs_cow_block(trans, root, old, NULL, 0, &old); + BUG_ON(ret); btrfs_set_lock_blocking(old); btrfs_copy_root(trans, root, old, &tmp, objectid); -- 1.7.3.4 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
