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>
diff --git a/kernel/printk.c b/kernel/printk.c
index e61346f..8fb01c3 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -921,7 +921,7 @@
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;