From: Vladimir Sementsov-Ogievskiy <vsement...@virtuozzo.com>

local_err is used again in mirror_exit_common() after
bdrv_set_backing_hd(), so we must zero it. Otherwise try to set
non-NULL local_err will crash.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsement...@virtuozzo.com>
Message-Id: <20200324153630.11882-3-vsement...@virtuozzo.com>
Reviewed-by: Eric Blake <ebl...@redhat.com>
Reviewed-by: John Snow <js...@redhat.com>
Signed-off-by: Max Reitz <mre...@redhat.com>
---
 block/mirror.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/block/mirror.c b/block/mirror.c
index 447051dbc6..6203e5946e 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -678,6 +678,7 @@ static int mirror_exit_common(Job *job)
             bdrv_set_backing_hd(target_bs, backing, &local_err);
             if (local_err) {
                 error_report_err(local_err);
+                local_err = NULL;
                 ret = -EPERM;
             }
         }
-- 
2.25.1


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