[lvm-devel] master - lvconvert: check if LV has cow type
Zdenek Kabelac
zkabelac at sourceware.org
Sat Sep 12 11:24:45 UTC 2020
Gitweb: https://sourceware.org/git/?p=lvm2.git;a=commitdiff;h=a9cb96f146377ff59a34a40792a9d8537ec89755
Commit: a9cb96f146377ff59a34a40792a9d8537ec89755
Parent: 463a61e62e32aa81391f40468d48d19948cd5062
Author: Zdenek Kabelac <zkabelac at redhat.com>
AuthorDate: Sat Sep 12 12:08:15 2020 +0200
Committer: Zdenek Kabelac <zkabelac at redhat.com>
CommitterDate: Sat Sep 12 12:55:20 2020 +0200
lvconvert: check if LV has cow type
Cow may not be a COW type, the return value of origin_from_cow(cow) may be NULL.
Reported-by: Wu Guanghao <wuguanghao3 at huawei.com>
Reported-by: Zhiqiang Liu <liuzhiqiang26 at huawei.com>
---
tools/lvconvert.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/tools/lvconvert.c b/tools/lvconvert.c
index d420eb52f..780a81567 100644
--- a/tools/lvconvert.c
+++ b/tools/lvconvert.c
@@ -1825,6 +1825,11 @@ static int _lvconvert_splitsnapshot(struct cmd_context *cmd, struct logical_volu
struct volume_group *vg = cow->vg;
const char *cow_name = display_lvname(cow);
+ if (!lv_is_cow(cow)) {
+ log_error(INTERNAL_ERROR "Volume %s is not a COW.", cow_name);
+ return 0;
+ }
+
if (lv_is_virtual_origin(origin_from_cow(cow))) {
log_error("Unable to split off snapshot %s with virtual origin.", cow_name);
return 0;
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