Btrfs-progs: fix Segmentation fault of btrfs-convert

Recently we merge a memory leak fix, which fails xfstests/btrfs/012,
the cause is that it only frees @fs_devices but leaves it on the global
fs_uuid list, which cause a 'Segmentation fault' over running command
btrfs-convert.  This fixes the problem.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.cz>

1 files changed, 8 insertions, 2 deletions

diff --git a/volumes.c b/volumes.c
index f623a444..388c94e1 100644
--- a/volumes.c
+++ b/volumes.c
@@ -184,12 +184,18 @@ again:
 	seed_devices = fs_devices->seed;
 	fs_devices->seed = NULL;
 	if (seed_devices) {
+		struct btrfs_fs_devices *orig;
+
+		orig = fs_devices;
 		fs_devices = seed_devices;
+		list_del(&orig->list);
+		free(orig);
 		goto again;
+	} else {
+		list_del(&fs_devices->list);
+		free(fs_devices);
 	}
 
-	list_del(&fs_devices->list);
-	free(fs_devices);
 	return 0;
 }