File util-linux-canonicalize-coverity-scan.patch of Package python3-libmount.17283

From 0ed52c662eea74f4c8a6d926f601a3c77fa3ff69 Mon Sep 17 00:00:00 2001
From: Karel Zak <kzak@redhat.com>
Date: Tue, 14 May 2019 15:47:02 +0200
Subject: [PATCH] lib/canonicalize: verify DM paths [coverity scan]

Now the code only checks that /sys/.../dm/name exists, but never
verify the device node in /dev (because path prefix is never NULL).

The prefix is used to redirect hardcoded paths to /sys dumps (e.g.
lsblk regression tests, etc.)

This bug has been introduced in v2.33. Fortunately, it's probably no
big issue as /dev is always in sync with /sys (thanks to udevd).

Signed-off-by: Karel Zak <kzak@redhat.com>
---
 lib/canonicalize.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/canonicalize.c b/lib/canonicalize.c
index fe10495..e8d170c 100644
--- a/lib/canonicalize.c
+++ b/lib/canonicalize.c
@@ -47,7 +47,7 @@ char *__canonicalize_dm_name(const char *prefix, const char *ptname)
 		name[sz - 1] = '\0';
 		snprintf(path, sizeof(path), _PATH_DEV_MAPPER "/%s", name);
 
-		if (prefix || access(path, F_OK) == 0)
+		if ((prefix && *prefix) || access(path, F_OK) == 0)
 			res = strdup(path);
 	}
 	fclose(f);
-- 
2.24.0