D35867.diff
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	diff --git a/sys/kern/imgact_elf.c b/sys/kern/imgact_elf.c
	--- a/sys/kern/imgact_elf.c
	+++ b/sys/kern/imgact_elf.c
	@@ -1221,9 +1221,16 @@
	goto ret;
	break;
	case PT_GNU_STACK:
	- if (__elfN(nxstack))
	+ if (__elfN(nxstack)) {
	imgp->stack_prot =
	__elfN(trans_prot)(phdr[i].p_flags);
	+ if ((imgp->stack_prot & VM_PROT_RW) !=
	+ VM_PROT_RW) {
	+ uprintf("Invalid PT_GNU_STACK\n");
	+ error = ENOEXEC;
	+ goto ret;
	+ }
	+ }
	imgp->stack_sz = phdr[i].p_memsz;
	break;
	case PT_PHDR: /* Program header table info */