From: Markus Armbruster <armbru@redhat.com>
Date: Wed, 30 Apr 2008 07:54:52 +0000 (-0700)
Subject: printk: don't read beyond string arguments' terminating zero
X-Git-Tag: v4.13~29733
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=f735295b14ae073a8302d7b1da894bc597724557;p=mirror_ubuntu-bionic-kernel.git

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 e61346faf6a5..8fb01c32aa3b 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;