Author: emaste
Date: Wed Feb 12 15:57:38 2014
New Revision: 261799
URL: http://svnweb.freebsd.org/changeset/base/261799
Log:
Add bounds check for pteindex / pdeindex
Modified:
head/lib/libkvm/kvm_minidump_amd64.c
Modified: head/lib/libkvm/kvm_minidump_amd64.c
==============================================================================
--- head/lib/libkvm/kvm_minidump_amd64.c Wed Feb 12 13:55:30 2014
(r261798)
+++ head/lib/libkvm/kvm_minidump_amd64.c Wed Feb 12 15:57:38 2014
(r261799)
@@ -214,6 +214,8 @@ _kvm_minidump_vatop_v1(kvm_t *kd, u_long
if (va >= vm->hdr.kernbase) {
pteindex = (va - vm->hdr.kernbase) >> PAGE_SHIFT;
+ if (pteindex >= vm->hdr.pmapsize / sizeof(*vm->page_map))
+ goto invalid;
pte = vm->page_map[pteindex];
if (((u_long)pte & PG_V) == 0) {
_kvm_err(kd, kd->program, "_kvm_vatop: pte not valid");
@@ -264,6 +266,8 @@ _kvm_minidump_vatop(kvm_t *kd, u_long va
if (va >= vm->hdr.kernbase) {
pdeindex = (va - vm->hdr.kernbase) >> PDRSHIFT;
+ if (pdeindex >= vm->hdr.pmapsize / sizeof(*vm->page_map))
+ goto invalid;
pde = vm->page_map[pdeindex];
if (((u_long)pde & PG_V) == 0) {
_kvm_err(kd, kd->program, "_kvm_vatop: pde not valid");
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