From c811dcf305a019c0baa5e218aee09be4a6a091c3 Mon Sep 17 00:00:00 2001
From: espie <espie@openbsd.org>
Date: Sun, 18 May 2014 09:29:54 +0000
Subject: [PATCH] use reallocarray and friends. okay miod@

---
 usr.sbin/config/config.h   |  5 +++--
 usr.sbin/config/hash.c     |  8 +++-----
 usr.sbin/config/main.c     |  4 ++--
 usr.sbin/config/mkioconf.c |  6 +++---
 usr.sbin/config/pack.c     | 16 ++++++++--------
 usr.sbin/config/sem.c      |  5 +++--
 usr.sbin/config/util.c     | 21 +++++++++++++++++----
 7 files changed, 39 insertions(+), 26 deletions(-)

diff --git a/usr.sbin/config/config.h b/usr.sbin/config/config.h
index 49d2b373141..f078f586afd 100644
--- a/usr.sbin/config/config.h
+++ b/usr.sbin/config/config.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: config.h,v 1.26 2013/10/29 15:37:56 espie Exp $	*/
+/*	$OpenBSD: config.h,v 1.27 2014/05/18 09:29:54 espie Exp $	*/
 /*	$NetBSD: config.h,v 1.30 1997/02/02 21:12:30 thorpej Exp $	*/
 
 /*
@@ -369,7 +369,8 @@ void	initsem(void);
 
 /* util.c */
 void	*emalloc(size_t);
-void	*erealloc(void *, size_t);
+void	*ereallocarray(void *, size_t, size_t);
+void	*ecalloc(size_t, size_t);
 char	*sourcepath(const char *);
 void	error(const char *, ...);			/* immediate errs */
 void	xerror(const char *, int, const char *, ...);	/* delayed errs */
diff --git a/usr.sbin/config/hash.c b/usr.sbin/config/hash.c
index 5111175af21..e9fda768a6b 100644
--- a/usr.sbin/config/hash.c
+++ b/usr.sbin/config/hash.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: hash.c,v 1.15 2011/10/02 22:20:49 edd Exp $	*/
+/*	$OpenBSD: hash.c,v 1.16 2014/05/18 09:29:54 espie Exp $	*/
 /*	$NetBSD: hash.c,v 1.4 1996/11/07 22:59:43 gwr Exp $	*/
 
 /*
@@ -128,7 +128,7 @@ ht_init(struct hashtab *ht, size_t sz)
 	struct hashent **h;
 	u_int n;
 
-	h = emalloc(sz * sizeof *h);
+	h = ereallocarray(NULL, sz, sizeof *h);
 	ht->ht_tab = h;
 	ht->ht_size = sz;
 	ht->ht_mask = sz - 1;
@@ -148,9 +148,7 @@ ht_expand(struct hashtab *ht)
 	u_int n, i;
 
 	n = ht->ht_size * 2;
-	h = emalloc(n * sizeof *h);
-	for (i = 0; i < n; i++)
-		h[i] = NULL;
+	h = ecalloc(n, sizeof *h);
 	oldh = ht->ht_tab;
 	n--;
 	for (i = ht->ht_size; i != 0; i--) {
diff --git a/usr.sbin/config/main.c b/usr.sbin/config/main.c
index d07cb8abcc7..0644a230cd4 100644
--- a/usr.sbin/config/main.c
+++ b/usr.sbin/config/main.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: main.c,v 1.46 2013/11/23 17:38:15 deraadt Exp $	*/
+/*	$OpenBSD: main.c,v 1.47 2014/05/18 09:29:54 espie Exp $	*/
 /*	$NetBSD: main.c,v 1.22 1997/02/02 21:12:33 thorpej Exp $	*/
 
 /*
@@ -735,7 +735,7 @@ optiondelta(void)
 
 	for (nnewopts = 0, nv = options; nv != NULL; nv = nv->nv_next)
 		nnewopts++;
-	newopts = (struct opt *)emalloc(nnewopts * sizeof(struct opt));
+	newopts = ereallocarray(NULL, nnewopts, sizeof(struct opt));
 	if (newopts == NULL)
 		ret = 0;
 	for (i = 0, nv = options; nv != NULL; nv = nv->nv_next, i++) {
diff --git a/usr.sbin/config/mkioconf.c b/usr.sbin/config/mkioconf.c
index a5b8a7964e6..ddc9ec586ea 100644
--- a/usr.sbin/config/mkioconf.c
+++ b/usr.sbin/config/mkioconf.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: mkioconf.c,v 1.31 2011/10/02 22:20:50 edd Exp $	*/
+/*	$OpenBSD: mkioconf.c,v 1.32 2014/05/18 09:29:54 espie Exp $	*/
 /*	$NetBSD: mkioconf.c,v 1.41 1996/11/11 14:18:49 mycroft Exp $	*/
 
 /*
@@ -201,7 +201,7 @@ addlocname(const char *name)
 
 	if (locnames == NULL || nlocnames+1 > maxlocnames) {
 		maxlocnames *= 4;
-		locnames = (char **)erealloc(locnames, maxlocnames * sizeof(char *));
+		locnames = ereallocarray(locnames, maxlocnames, sizeof(char *));
 	}
 	for (i = 0; i < nlocnames; i++)
 		if (strcmp(name, locnames[i]) == 0)
@@ -219,7 +219,7 @@ addlocnami(short index)
 {
 	if (locnami == NULL || nlocnami+1 > maxlocnami) {
 		maxlocnami *= 4;
-		locnami = (short *)erealloc(locnami, maxlocnami * sizeof(short));
+		locnami = ereallocarray(locnami, maxlocnami, sizeof(short));
 	}
 	locnami[nlocnami++] = index;
 }
diff --git a/usr.sbin/config/pack.c b/usr.sbin/config/pack.c
index cd1937d3cae..93a74e6e64d 100644
--- a/usr.sbin/config/pack.c
+++ b/usr.sbin/config/pack.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: pack.c,v 1.16 2011/10/02 22:20:50 edd Exp $	*/
+/*	$OpenBSD: pack.c,v 1.17 2014/05/18 09:29:54 espie Exp $	*/
 /*	$NetBSD: pack.c,v 1.5 1996/08/31 21:15:11 mycroft Exp $	*/
 
 /*
@@ -144,12 +144,12 @@ pack(void)
 	}
 
 	/* Allocate and pack loc[]. */
-	locators.vec = emalloc(locspace * sizeof(*locators.vec));
+	locators.vec = ereallocarray(NULL, locspace, sizeof(*locators.vec));
 	locators.used = 0;
 	packlocs();
 
 	/* Allocate and pack pv[]. */
-	parents.vec = emalloc(pvecspace * sizeof(*parents.vec));
+	parents.vec = ereallocarray(NULL, pvecspace, sizeof(*parents.vec));
 	parents.used = 0;
 	packpvec();
 }
@@ -167,7 +167,7 @@ packdevi(void)
 	struct deva *d;
 	int j, m, n;
 
-	packed = emalloc((ndevi + 1) * sizeof *packed);
+	packed = ereallocarray(NULL, ndevi + 1, sizeof *packed);
 	n = 0;
 	for (d = alldevas; d != NULL; d = d->d_next) {
 		/*
@@ -247,7 +247,7 @@ addparents(struct devi *src, struct devi *dst)
 		return;
 	if (src->i_atdev != NULL) {
 		n = nparents(NULL, src->i_atdev, src->i_atunit);
-		p = emalloc(n * sizeof *p);
+		p = ereallocarray(NULL, n, sizeof *p);
 		if (n == 0)
 			return;
 		(void)nparents(p, src->i_atdev, src->i_atunit);
@@ -257,7 +257,7 @@ addparents(struct devi *src, struct devi *dst)
 			n += nparents(NULL, nv->nv_ptr, src->i_atunit);
 		if (n == 0)
 			return;
-		p = emalloc(n * sizeof *p);
+		p = ereallocarray(NULL, n, sizeof *p);
 		n = 0;
 		for (nv = src->i_atattr->a_refs; nv != NULL; nv = nv->nv_next)
 			n += nparents(p + n, nv->nv_ptr, src->i_atunit);
@@ -283,7 +283,7 @@ addparents(struct devi *src, struct devi *dst)
 		free(p);
 		return;
 	}
-	dst->i_parents = q = erealloc(dst->i_parents, (new + 1) * sizeof(*q));
+	dst->i_parents = q = ereallocarray(dst->i_parents, new + 1, sizeof(*q));
 	dst->i_pvlen = new;
 	q[new] = NULL;
 	q += old;
@@ -343,7 +343,7 @@ packpvec(void)
 	int l, v, o;
 	short *vec;
 
-	vec = emalloc(longest_pvec * sizeof(*vec));
+	vec = ereallocarray(NULL, longest_pvec, sizeof(*vec));
 	qsort(packed, npacked, sizeof *packed, pvlencmp);
 	for (p = packed; (i = *p) != NULL; p++) {
 		l = i->i_pvlen;
diff --git a/usr.sbin/config/sem.c b/usr.sbin/config/sem.c
index a78198812fc..328d5f73f1a 100644
--- a/usr.sbin/config/sem.c
+++ b/usr.sbin/config/sem.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: sem.c,v 1.33 2013/11/23 17:38:15 deraadt Exp $	*/
+/*	$OpenBSD: sem.c,v 1.34 2014/05/18 09:29:54 espie Exp $	*/
 /*	$NetBSD: sem.c,v 1.10 1996/11/11 23:40:11 gwr Exp $	*/
 
 /*
@@ -1099,7 +1099,8 @@ fixloc(const char *name, struct attr *attr, struct nvlist *got)
 	if (attr->a_loclen == 0)	/* e.g., "at root" */
 		lp = nullvec;
 	else
-		lp = emalloc((attr->a_loclen + 1) * sizeof(const char *));
+		lp = ereallocarray(NULL, attr->a_loclen + 1, 
+		    sizeof(const char *));
 	for (n = got; n != NULL; n = n->nv_next)
 		n->nv_int = -1;
 	nmissing = 0;
diff --git a/usr.sbin/config/util.c b/usr.sbin/config/util.c
index 56633058944..9bd15a81b12 100644
--- a/usr.sbin/config/util.c
+++ b/usr.sbin/config/util.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: util.c,v 1.13 2011/10/02 22:20:50 edd Exp $	*/
+/*	$OpenBSD: util.c,v 1.14 2014/05/18 09:29:54 espie Exp $	*/
 /*	$NetBSD: util.c,v 1.5 1996/08/31 20:58:29 mycroft Exp $	*/
 
 /*
@@ -69,13 +69,26 @@ emalloc(size_t size)
 }
 
 /*
- * Realloc, with abort on error.
+ * Reallocarray, with abort on error.
  */
 void *
-erealloc(void *p, size_t size)
+ereallocarray(void *p, size_t sz1, size_t sz2)
 {
 
-	if ((p = realloc(p, size)) == NULL)
+	if ((p = reallocarray(p, sz1, sz2)) == NULL)
+		nomem();
+	return (p);
+}
+
+/*
+ * Calloc, with abort on error.
+ */
+void *
+ecalloc(size_t sz1, size_t sz2)
+{
+	void *p;
+
+	if ((p = calloc(sz1, sz2)) == NULL)
 		nomem();
 	return (p);
 }
-- 
2.20.1