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_vg_read_raw_area: fix segfault caused by using null pointer

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When we tested lvm2, the kernel injected various random faults.

(gdb) bt
...
(gdb) p vg
$1 = (struct volume_group *) 0x0
(gdb) p use_previous_vg
$2 = (unsigned int *) 0x0

Signed-off-by: Wu Guanghao <wuguanghao3@huawei.com>
This commit is contained in:
Wu Guanghao 2022-08-15 09:39:02 -05:00 committed by David Teigland
parent 6b2e4ec5dc
commit ce58e9d5b3
1 changed files with 1 additions and 1 deletions
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2
lib/format_text/format-text.c
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@ -428,7 +428,7 @@ static struct volume_group *_vg_read_raw_area(struct cmd_context *cmd,
rlocn->checksum,
&when, &desc);
if (!vg && !*use_previous_vg) {
if (!vg && (!use_previous_vg || !*use_previous_vg)) {
log_warn("WARNING: Failed to read metadata text at %llu off %llu size %llu VG %s on %s",
(unsigned long long)(area->start + rlocn->offset),
(unsigned long long)rlocn->offset,