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migration/colo: fix use after free of local_err

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

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20200324153630.11882-5-vsementsov@virtuozzo.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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Vladimir Sementsov-Ogievskiy 2020-03-24 18:36:28 +03:00 committed by Dr. David Alan Gilbert
parent d96c4d5f19
commit 27d07fcfa7
1 changed files with 1 additions and 0 deletions
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migration/colo.c
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@ -93,6 +93,7 @@ static void secondary_vm_do_failover(void)
replication_stop_all(true, &local_err); replication_stop_all(true, &local_err);
if (local_err) { if (local_err) {
error_report_err(local_err); error_report_err(local_err);
local_err = NULL;
} }
/* Notify all filters of all NIC to do checkpoint */ /* Notify all filters of all NIC to do checkpoint */