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Add additional checks of the kernel stack addresses in order to

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ensure we don't overrun the end of the call chain.

MFC after:	1 week
This commit is contained in:
Marius Strobl 2009-12-08 20:18:54 +00:00
parent 933ef0ba72
commit 259100de20
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=200272
2 changed files with 22 additions and 6 deletions
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14
sys/sparc64/sparc64/stack_machdep.c
View File

@ -36,15 +36,20 @@ __FBSDID("$FreeBSD$");
#include <machine/stack.h>
#include <machine/vmparam.h>
static void stack_capture(struct stack *st, struct frame *fp);
static void stack_capture(struct stack *st, struct frame *frame);
static void
stack_capture(struct stack *st, struct frame *fp)
stack_capture(struct stack *st, struct frame *frame)
{
struct frame *fp;
vm_offset_t callpc;
stack_zero(st);
while (1) {
fp = frame;
for (;;) {
if (!INKERNEL((vm_offset_t)fp) ||
!ALIGNED_POINTER(fp, uint64_t))
break;
callpc = fp->fr_pc;
if (!INKERNEL(callpc))
break;
@ -56,6 +61,9 @@ stack_capture(struct stack *st, struct frame *fp)
break;
if (stack_put(st, callpc) == -1)
break;
if (v9next_frame(fp) <= fp ||
v9next_frame(fp) >= frame + KSTACK_PAGES * PAGE_SIZE)
break;
fp = v9next_frame(fp);
}
}

14
sys/sun4v/sun4v/stack_machdep.c
View File

@ -36,20 +36,28 @@ __FBSDID("$FreeBSD$");
#include <machine/stack.h>
#include <machine/vmparam.h>
static void stack_capture(struct stack *st, struct frame *fp);
static void stack_capture(struct stack *st, struct frame *frame);
static void
stack_capture(struct stack *st, struct frame *fp)
stack_capture(struct stack *st, struct frame *frame)
{
struct frame *fp;
vm_offset_t callpc;
stack_zero(st);
while (1) {
fp = frame;
for (;;) {
if (!INKERNEL((vm_offset_t)fp) ||
!ALIGNED_POINTER(fp, uint64_t))
break;
callpc = fp->fr_pc;
if (!INKERNEL(callpc))
break;
if (stack_put(st, callpc) == -1)
break;
if (v9next_frame(fp) <= fp ||
v9next_frame(fp) >= frame + KSTACK_PAGES * PAGE_SIZE)
break;
fp = v9next_frame(fp);
}
}