kobject: Replace strncpy with memcpy

commit 77d2a24b6107bd9b3bf2403a65c1428a9da83dd0 upstream.

gcc 8.1.0 complains:

lib/kobject.c:128:3: warning:
	'strncpy' output truncated before terminating nul copying as many
	bytes from a string as its length [-Wstringop-truncation]
lib/kobject.c: In function 'kobject_get_path':
lib/kobject.c:125:13: note: length computed here

Using strncpy() is indeed less than perfect since the length of data to
be copied has already been determined with strlen(). Replace strncpy()
with memcpy() to address the warning and optimize the code a little.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/lib/kobject.c b/lib/kobject.c
index 895edb63fba4a3e62b239f16072c8299ff9d8de1..35d490b02cddd174277f13a2976c945594dcf553 100644 (file)
--- a/lib/kobject.c
+++ b/lib/kobject.c
@@ -127,7 +127,7 @@ static void fill_kobj_path(struct kobject *kobj, char *path, int length)
                int cur = strlen(kobject_name(parent));
                /* back up enough to print this name with '/' */
                length -= cur;
-               strncpy(path + length, kobject_name(parent), cur);
+               memcpy(path + length, kobject_name(parent), cur);
                *(path + --length) = '/';
        }