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 519accaf4afcb808f4de73d15204f8020e0688cb..18c6cd4150f82df3636508f10d0f73e23382e597 100644 (file)
--- 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)