4.9-stable review patch. If anyone has any objections, please let me know.
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From: Guenter Roeck linux@roeck-us.net
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
--- lib/kobject.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/lib/kobject.c +++ b/lib/kobject.c @@ -127,7 +127,7 @@ static void fill_kobj_path(struct kobjec 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) = '/'; }