Author: andrew
Date: Mon Aug 24 17:28:19 2015
New Revision: 287113
URL: https://svnweb.freebsd.org/changeset/base/287113
Log:
Check the frame pointer is within the kernel before accessing it.
Modified:
head/sys/arm64/arm64/unwind.c
Modified: head/sys/arm64/arm64/unwind.c
==============================================================================
--- head/sys/arm64/arm64/unwind.c Mon Aug 24 16:32:57 2015
(r287112)
+++ head/sys/arm64/arm64/unwind.c Mon Aug 24 17:28:19 2015
(r287113)
@@ -32,6 +32,7 @@ __FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <machine/stack.h>
+#include <machine/vmparam.h>
int
unwind_frame(struct unwind_state *frame)
@@ -39,7 +40,7 @@ unwind_frame(struct unwind_state *frame)
uint64_t fp;
fp = frame->fp;
- if (fp == 0)
+ if (!INKERNEL(fp))
return (-1);
frame->sp = fp + 0x10;
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