fix segfault of pvscan --cache

0015-_vg_read_raw_area-fix-segfault-caused-by-using-null-.patch

@@ -0,0 +1,35 @@
+From ce58e9d5b37c3e408f2b41c8095980490a87f2a4 Mon Sep 17 00:00:00 2001
+From: Wu Guanghao <wuguanghao3@huawei.com>
+Date: Mon, 15 Aug 2022 09:39:02 -0500
+Subject: [PATCH] _vg_read_raw_area: fix segfault caused by using null pointer
+
+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>
+---
+ lib/format_text/format-text.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/lib/format_text/format-text.c b/lib/format_text/format-text.c
+index 07aaa0b28..c1ccdb031 100644
+--- a/lib/format_text/format-text.c
++++ b/lib/format_text/format-text.c
+@@ -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,
+-- 
+2.34.1
+

lvm2.spec

@@ -43,7 +43,7 @@
 
 Name:      lvm2
 Version:   2.03.14
-Release:   5
+Release:   6
 Epoch:     8
 Summary:   Tools for logical volume management
 License:   GPLv2+ and LGPLv2.1 and BSD
@@ -63,6 +63,7 @@ Patch11:   0011-bugfix-lvm2-fix-the-reuse-of-va_list.patch
 Patch12:   0012-13-dm-disk.rules-check-DM_NAME-before-create-symlink.patch
 Patch13:   0013-dev_name-determine-whether-the-dev-aliases-linked-li.patch
 Patch14:   0014-lvm-code-reduce-cyclomatic-complexity.patch
+Patch15:   0015-_vg_read_raw_area-fix-segfault-caused-by-using-null-.patch
 
 BuildRequires: gcc
 BuildRequires: gcc-c++
@@ -489,6 +490,9 @@ fi
 
 
 %changelog
+* Sun Sep 04 2022 wuguanghao <wuguanghao3@huawei.com> - 8:2.03.14-6
+- lvm: fix segfault of pvscan --cache
+
 * Wed Apr 27 2022 wuguanghao <wuguanghao3@huawei.com> - 8:2.03.14-5
 - lvm: fix error of epoch version