35 lines
1.2 KiB
Diff
35 lines
1.2 KiB
Diff
From 682d23829adf0a872d5a3ca6eb4b31c424f558fc Mon Sep 17 00:00:00 2001
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From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
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Date: Tue, 24 Mar 2020 18:36:26 +0300
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Subject: [PATCH 09/14] block/mirror: fix use after free of local_err
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local_err is used again in mirror_exit_common() after
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bdrv_set_backing_hd(), so we must zero it. Otherwise try to set
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non-NULL local_err will crash.
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Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
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Message-Id: <20200324153630.11882-3-vsementsov@virtuozzo.com>
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Reviewed-by: Eric Blake <eblake@redhat.com>
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Reviewed-by: John Snow <jsnow@redhat.com>
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Signed-off-by: Max Reitz <mreitz@redhat.com>
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Signed-off-by: Peng Liang <liangpeng10@huawei.com>
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---
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block/mirror.c | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/block/mirror.c b/block/mirror.c
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index 681b305de650..ef6c958ff9b3 100644
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--- a/block/mirror.c
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+++ b/block/mirror.c
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@@ -674,6 +674,7 @@ static int mirror_exit_common(Job *job)
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bdrv_set_backing_hd(target_bs, backing, &local_err);
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if (local_err) {
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error_report_err(local_err);
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+ local_err = NULL;
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ret = -EPERM;
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}
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}
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--
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2.26.2
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