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pvmove: check return value of top_level_lv_name()

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The return value of top_level_lv_name() may be NULL, so we should
check return value of top_level_lv_name before calling
strcmp(lv->name, top_level_lv_name(vg, lv_name)).

Signed-off-by: Wu Guanghao <wuguanghao3@huawei.com>
Signed-off-by: Zhiqiang Liu <liuzhiqiang26@huawei.com>
This commit is contained in:
Wu Guanghao 2020-09-11 17:40:09 +08:00 committed by Zdenek Kabelac
parent c38c4d9d36
commit d71199920f
1 changed files with 8 additions and 2 deletions
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10
tools/pvmove.c
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@ -326,6 +326,7 @@ static struct logical_volume *_set_up_pvmove_lv(struct cmd_context *cmd,
int lv_skipped = 0;
int needs_exclusive = *exclusive;
const struct logical_volume *holder;
const char *new_lv_name;
/* FIXME Cope with non-contiguous => splitting existing segments */
if (!(lv_mirr = lv_create_empty("pvmove%d", NULL,
@ -363,8 +364,13 @@ static struct logical_volume *_set_up_pvmove_lv(struct cmd_context *cmd,
if (lv == lv_mirr)
continue;
if (lv_name && strcmp(lv->name, top_level_lv_name(vg, lv_name)))
continue;
if (lv_name) {
if (!(new_lv_name = top_level_lv_name(vg, lv_name)))
return_NULL;
if (strcmp(lv->name, new_lv_name))
continue;
}
if (!lv_is_on_pvs(lv, source_pvl))
continue;