[lvm-devel] [PATCH 16/29] Test uuid for NULL

[Zdenek Kabelac]

This one again makes static analysis easier.

Though in this case when uuid is NULL len is also 0 so no bytes are
copied from the src address so no dereference happens - the function
memcpy itself is declared as the function which doesn't take
NULL as either src or dst parameter - let's be complaint.

Signed-off-by: Zdenek Kabelac <zkabelac at redhat.com>
---
 tools/dmsetup.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/tools/dmsetup.c b/tools/dmsetup.c
index 241fa74..1a56d24 100644
--- a/tools/dmsetup.c
+++ b/tools/dmsetup.c
@@ -343,7 +343,9 @@ static char *_extract_uuid_prefix(const char *uuid, const int separator)
 		return NULL;
 	}
 
-	memcpy(uuid_prefix, uuid, len);
+	if (uuid)
+		memcpy(uuid_prefix, uuid, len);
+
 	uuid_prefix[len] = '\0';
 
 	return uuid_prefix;
-- 
1.7.3.2