device-mapper-multipath/0118-libmultipath-check-return-value-of-udev_device_get_d.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Martin Wilck <mwilck@suse.com>
Date: Tue, 2 Feb 2021 15:18:33 +0100
Subject: [PATCH] libmultipath: check return value of udev_device_get_devnum()

udev_device_get_devnum() may fail, in which case it returns
makedev(0, 0).

Reviewed-by: Benjamin Marzinski <bmarzins@redhat.com>
Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
---
 libmultipath/discovery.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libmultipath/discovery.c b/libmultipath/discovery.c
index 921025d4..15cf6413 100644
--- a/libmultipath/discovery.c
+++ b/libmultipath/discovery.c
@@ -1659,6 +1659,9 @@ common_sysfs_pathinfo (struct path * pp)
 		return PATHINFO_FAILED;
 	}
 	devt = udev_device_get_devnum(pp->udev);
+	if (major(devt) == 0 && minor(devt) == 0)
+		return PATHINFO_FAILED;
+
 	snprintf(pp->dev_t, BLK_DEV_SIZE, "%d:%d", major(devt), minor(devt));
 
 	condlog(4, "%s: dev_t = %s", pp->dev, pp->dev_t);
-- 
2.17.2