linux-kernel - [PATCH 32/72] Blackfin: do not try displaying the end of the stack

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Message-Id: <1252958896-25150-33-git-send-email-vapier@gentoo.org>
Date:	Mon, 14 Sep 2009 16:07:36 -0400
From:	Mike Frysinger <vapier@...too.org>
To:	linux-kernel@...r.kernel.org
Cc:	uclinux-dist-devel@...ckfin.uclinux.org,
	Sonic Zhang <sonic.zhang@...log.com>
Subject: [PATCH 32/72] Blackfin: do not try displaying the end of the stack

From: Sonic Zhang <sonic.zhang@...log.com>

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@...log.com>
Signed-off-by: Mike Frysinger <vapier@...too.org>
---
 arch/blackfin/kernel/traps.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

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)
-- 
1.6.4.2

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