Aren/NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Hook to clamp the random value for mmap for machies that don't have enough

Browse Source 
VA bits.
This commit is contained in:
christos 2016-05-17 00:38:50 +00:00
parent bb32bde822
commit f2f81db6f6
1 changed files with 5 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
sys/kern/kern_pax.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: kern_pax.c,v 1.45 2016/05/14 17:04:09 christos Exp $ */
/* $NetBSD: kern_pax.c,v 1.46 2016/05/17 00:38:50 christos Exp $ */
/*
* Copyright (c) 2015 The NetBSD Foundation, Inc.
@ -57,7 +57,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: kern_pax.c,v 1.45 2016/05/14 17:04:09 christos Exp $");
__KERNEL_RCSID(0, "$NetBSD: kern_pax.c,v 1.46 2016/05/17 00:38:50 christos Exp $");
#include "opt_pax.h"
@ -481,6 +481,9 @@ pax_aslr_init_vm(struct lwp *l, struct vmspace *vm, struct exec_package *ep)
#ifdef PAX_ASLR_DEBUG
if (pax_aslr_flags & PAX_ASLR_FIXED)
rand = pax_aslr_rand;
#endif
#ifdef PAX_ASLR_RAND_MMAP_MAX
rand &= PAX_ASLR_RAND_MMAP_MAX - 1;
#endif
vm->vm_aslr_delta_mmap = PAX_ASLR_DELTA(rand,
PAX_ASLR_DELTA_MMAP_LSB, len);