printk: don't read beyond string arguments' terminating zero

Fix update_console_cmdline() not to to read beyond the terminating zero of its
name argument.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/kernel/printk.c b/kernel/printk.c
index e61346faf6a..8fb01c32aa3 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -921,7 +921,7 @@ int update_console_cmdline(char *name, int idx, char *name_new, int idx_new, cha
                 if (strcmp(console_cmdline[i].name, name) == 0 &&
                           console_cmdline[i].index == idx) {
                                 c = &console_cmdline[i];
-                                memcpy(c->name, name_new, sizeof(c->name));
+                                strlcpy(c->name, name_new, sizeof(c->name));
                                 c->name[sizeof(c->name) - 1] = 0;
                                 c->options = options;
                                 c->index = idx_new;