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Message-Id: <20131218210522.971706803@linuxfoundation.org> Date: Wed, 18 Dec 2013 13:08:14 -0800 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Konstantin Khlebnikov <k.khlebnikov@...sung.com>, Russell King <rmk+kernel@....linux.org.uk> Subject: [PATCH 3.4 06/31] ARM: 7913/1: fix framepointer check in unwind_frame 3.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Konstantin Khlebnikov <k.khlebnikov@...sung.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.khlebnikov@...sung.com> Signed-off-by: Russell King <rmk+kernel@....linux.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- 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 */ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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