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On a verbose kernel boot show why executables are denied due to their start

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adresses. This will hardly ever occure in real-life.
This commit is contained in:
reinoud 2011-08-25 19:14:07 +00:00
parent 199cc6c15a
commit f6a2add8fe
1 changed files with 14 additions and 3 deletions
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17
sys/kern/kern_exec.c
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@ -1,4 +1,4 @@
/* $NetBSD: kern_exec.c,v 1.317 2011/08/08 12:08:53 manu Exp $ */
/* $NetBSD: kern_exec.c,v 1.318 2011/08/25 19:14:07 reinoud Exp $ */
/*-
* Copyright (c) 2008 The NetBSD Foundation, Inc.
@ -59,7 +59,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: kern_exec.c,v 1.317 2011/08/08 12:08:53 manu Exp $");
__KERNEL_RCSID(0, "$NetBSD: kern_exec.c,v 1.318 2011/08/25 19:14:07 reinoud Exp $");
#include "opt_ktrace.h"
#include "opt_modular.h"
@ -370,8 +370,17 @@ check_exec(struct lwp *l, struct exec_package *epp, struct pathbuf *pb)
newerror = (*execsw[i]->es_makecmds)(l, epp);
if (!newerror) {
/* Seems ok: check that entry point is sane */
/* Seems ok: check that entry point is not too high */
if (epp->ep_entry > VM_MAXUSER_ADDRESS) {
aprint_verbose("check_exec: rejecting due to "
"too high entry address\n");
error = ENOEXEC;
break;
}
/* Seems ok: check that entry point is not too low */
if (epp->ep_entry < VM_MIN_ADDRESS) {
aprint_verbose("check_exec: rejecting due to "
"too low entry address\n");
error = ENOEXEC;
break;
}
@ -380,6 +389,8 @@ check_exec(struct lwp *l, struct exec_package *epp, struct pathbuf *pb)
if ((epp->ep_tsize > MAXTSIZ) ||
(epp->ep_dsize > (u_quad_t)l->l_proc->p_rlimit
[RLIMIT_DATA].rlim_cur)) {
aprint_debug("check_exec: rejecting due to "
"limits\n");
error = ENOMEM;
break;
}