3.2.54-rc1 review patch. If anyone has any objections, please let me know.
------------------
From: Konstantin Khlebnikov <k.khlebni...@samsung.com>
commit 3abb6671a9c04479c4bd026798a05f857393b7e2 upstream.
This patch fixes corner case when (fp + 4) overflows unsigned long,
for example: fp = 0xFFFFFFFF -> fp + 4 == 3.
Signed-off-by: Konstantin Khlebnikov <k.khlebni...@samsung.com>
Signed-off-by: Russell King <rmk+ker...@arm.linux.org.uk>
Signed-off-by: Ben Hutchings <b...@decadent.org.uk>
---
arch/arm/kernel/stacktrace.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/arm/kernel/stacktrace.c
+++ b/arch/arm/kernel/stacktrace.c
@@ -31,7 +31,7 @@ int notrace unwind_frame(struct stackfra
high = ALIGN(low, THREAD_SIZE);
/* check current frame pointer is within bounds */
- if (fp < (low + 12) || fp + 4 >= high)
+ if (fp < low + 12 || fp > high - 4)
return -EINVAL;
/* restore the registers from the stack frame */
--
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