[PATCH -tip] x86/boot: Reserve enough space for any cpu level string

[PATCH -tip] x86/boot: Reserve enough space for any cpu level string

[Cyrill Gorcunov]

Currently when we're validating cpu on boot stage we assume that cpu level
won't ever be greater than two digits. In particular the check_cpu() helper
ensures to be so. Still the cpu_name() helper is a way too far from
check_cpu() routine internals so I think better to be on a safe side
and prevent any possible overrun errors when printing cpu name.
For this sake just increase the buffer up to be able to keep any level.

CC: Ingo Molnar <mingo@kernel.org>
CC: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
---
 arch/x86/boot/cpu.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux-tip.git/arch/x86/boot/cpu.c
===================================================================
--- linux-tip.git.orig/arch/x86/boot/cpu.c
+++ linux-tip.git/arch/x86/boot/cpu.c
@@ -20,7 +20,7 @@
 
 static char *cpu_name(int level)
 {
-	static char buf[6];
+	static char buf[16];
 
 	if (level == 64) {
 		return "x86-64";