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migration/ram: fix use after free of local_err

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local_err is used again in migration_bitmap_sync_precopy() after
precopy_notify(), 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: <20200324153630.11882-6-vsementsov@virtuozzo.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2020-03-24 18:36:29 +03:00 committed by Dr. David Alan Gilbert
parent 27d07fcfa7
commit b4a1733c5e
1 changed files with 1 additions and 0 deletions
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migration/ram.c
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@ -980,6 +980,7 @@ static void migration_bitmap_sync_precopy(RAMState *rs)
*/ */
if (precopy_notify(PRECOPY_NOTIFY_BEFORE_BITMAP_SYNC, &local_err)) { if (precopy_notify(PRECOPY_NOTIFY_BEFORE_BITMAP_SYNC, &local_err)) {
error_report_err(local_err); error_report_err(local_err);
local_err = NULL;
} }
migration_bitmap_sync(rs); migration_bitmap_sync(rs);