commit e878bb1293d2cd0082550b320c3ccf245d0a69d4
author Kevin Wolf <kwolf@redhat.com> Mon May 03 13:05:54 2021 +0200
committer Kevin Wolf <kwolf@redhat.com> Tue May 18 11:08:13 2021 +0200
tree 63b198f443afdcb7da527d1508836f50f5ee8a31
parent 38b440964736a5fca2c95606ce3efaa35381fa9d

block: Fix Transaction leak in bdrv_root_attach_child()

The error path needs to call tran_finalize(), too.

Fixes: CID 1452773
Fixes: 548a74c0dbc858edd1a7ee3045b5f2fe710bd8b1
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20210503110555.24001-2-kwolf@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

block.c

diff --git a/block.c b/block.c
index 75a82af..6dbe9af 100644
--- a/block.c
+++ b/block.c
@@ -2916,13 +2916,14 @@
                                    child_role, perm, shared_perm, opaque,
                                    &child, tran, errp);
     if (ret < 0) {
-        bdrv_unref(child_bs);
-        return NULL;
+        assert(child == NULL);
+        goto out;
     }
 
     ret = bdrv_refresh_perms(child_bs, errp);
-    tran_finalize(tran, ret);
 
+out:
+    tran_finalize(tran, ret);
     bdrv_unref(child_bs);
     return child;
 }