From: Sonic Zhang <sonic.zhang@analog.com>
Date: Thu, 16 Jul 2009 10:36:35 +0000 (+0000)
Subject: Blackfin: do not try displaying the end of the stack
X-Git-Tag: v2.6.32-rc1~662^2~43
X-Git-Url: http://ftp.safe.ca/?p=safe%2Fjmp%2Flinux-2.6;a=commitdiff_plain;h=407505dc01ac2b4f2944cd3c6a0c02473ffb869e

Blackfin: do not try displaying the end of the stack

The end of the stack may not be valid (and that could be OK), so do not
attempt to parse it.  If we do, we might use a bad pointer in kernel space
which makes things panic().

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
---

diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c
index 519acca..18c6cd4 100644
--- a/arch/blackfin/kernel/traps.c
+++ b/arch/blackfin/kernel/traps.c
@@ -911,7 +911,7 @@ void show_stack(struct task_struct *task, unsigned long *stack)
 		frame_no = 0;
 
 		for (addr = (unsigned int *)((unsigned int)stack & ~0xF), i = 0;
-		     addr <= endstack; addr++, i++) {
+		     addr < endstack; addr++, i++) {
 
 			ret_addr = 0;
 			if (!j && i % 8 == 0)