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Add bounds check for pteindex / pdeindex

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This commit is contained in:
Ed Maste 2014-02-12 15:57:38 +00:00
parent 9968f056d6
commit 4842a3220d
1 changed files with 4 additions and 0 deletions
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4
lib/libkvm/kvm_minidump_amd64.c
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@ -214,6 +214,8 @@ _kvm_minidump_vatop_v1(kvm_t *kd, u_long va, off_t *pa)
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, off_t *pa)
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");