dm-event: release buffer on dm_event_get_version

Signed-off-by: wangzhiqiang <wangzhiqiang95@huawei.com>

0016-dm-event-release-buffer-on-dm_event_get_version.patch

@@ -0,0 +1,45 @@
+From a203499ba32aabec0e8a9002517e1608e4e83b2c Mon Sep 17 00:00:00 2001
+From: Zdenek Kabelac <zkabelac@redhat.com>
+Date: Mon, 25 Sep 2023 11:47:40 +0200
+Subject: [PATCH] dm-event: release buffer on dm_event_get_version
+
+Avoid memory leak in this function.
+---
+ daemons/dmeventd/libdevmapper-event.c | 11 ++++++++---
+ 1 file changed, 8 insertions(+), 3 deletions(-)
+
+diff --git a/daemons/dmeventd/libdevmapper-event.c b/daemons/dmeventd/libdevmapper-event.c
+index 9e4dd2469..0aabc03e6 100644
+--- a/daemons/dmeventd/libdevmapper-event.c
++++ b/daemons/dmeventd/libdevmapper-event.c
+@@ -844,6 +844,7 @@ int dm_event_get_registered_device(struct dm_event_handler *dmevh, int next)
+ int dm_event_get_version(struct dm_event_fifos *fifos, int *version) {
+ 	char *p;
+ 	struct dm_event_daemon_message msg = { 0 };
++	int ret = 0;
+ 
+ 	if (daemon_talk(fifos, &msg, DM_EVENT_CMD_HELLO, NULL, NULL, 0, 0))
+ 		return 0;
+@@ -851,13 +852,17 @@ int dm_event_get_version(struct dm_event_fifos *fifos, int *version) {
+ 	*version = 0;
+ 
+ 	if (!p || !(p = strchr(p, ' '))) /* Message ID */
+-		return 0;
++		goto out;
+ 	if (!(p = strchr(p + 1, ' '))) /* HELLO */
+-		return 0;
++		goto out;
+ 	if ((p = strchr(p + 1, ' '))) /* HELLO, once more */
+ 		*version = atoi(p);
+ 
+-	return 1;
++	ret = 1;
++out:
++	free(msg.data);
++
++	return ret;
+ }
+ 
+ void dm_event_log_set(int debug_log_level, int use_syslog)
+-- 
+2.39.3

lvm2.spec

@@ -43,7 +43,7 @@
 
 Name:      lvm2
 Version:   2.03.22
-Release:   1
+Release:   2
 Epoch:     8
 Summary:   Tools for logical volume management
 License:   GPLv2+ and LGPLv2.1 and BSD
@@ -64,6 +64,7 @@ Patch12:   0012-lvm-code-reduce-cyclomatic-complexity.patch
 Patch13:   0013-udev-repeat.patch
 Patch14:   0014-use-sync-io-read-bcache-by-defaults.patch
 Patch15:   0015-vgchange-acquire-an-exclusive-VG-lock-for-refresh.patch
+Patch16:   0016-dm-event-release-buffer-on-dm_event_get_version.patch
 
 BuildRequires: gcc
 BuildRequires: gcc-c++
@@ -490,6 +491,9 @@ fi
 
 
 %changelog
+* Tue Dec 19 2023 wangzhiqiang <wangzhiqiang95@huawei.com> - 8:2.03.22-2
+- dm-event: release buffer on dm_event_get_version
+
 * Fri Nov 03 2023 liweigang <weigangli99@gmail.com> - 8:2.03.22-1
 - update to version 2.03.22