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authorIngo Schwarze <schwarze@openbsd.org>2014-04-23 21:06:41 +0000
committerIngo Schwarze <schwarze@openbsd.org>2014-04-23 21:06:41 +0000
commitc4641c1dc73700968ee90de85e04b2f32fbadc8a (patch)
tree22eb558acb2454bff882d8b4571d21d8c6fd8e54
parent2255a3e49af03406199043bf555c96acf31eb877 (diff)
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Audit malloc(3)/calloc(3)/realloc(3) usage.
* Change eight reallocs to reallocarray to be safe from overflows. * Change one malloc to reallocarray to be safe from overflows. * Change one calloc to reallocarray, no zeroing needed. * Change the order of arguments of three callocs (aesthetical).
Diffstat
-rw-r--r--LICENSE3
-rw-r--r--Makefile3
-rw-r--r--compat_reallocarray.c45
-rwxr-xr-xconfigure1
-rw-r--r--eqn.c6
-rw-r--r--mandoc_aux.c14
-rw-r--r--mandoc_aux.h3
-rw-r--r--mandocdb.c10
-rw-r--r--manpath.c6
-rw-r--r--mansearch.c8
-rw-r--r--mdoc_argv.c10
-rw-r--r--mdoc_validate.c10
-rw-r--r--term.c4
-rw-r--r--term_ps.c14
-rw-r--r--test-reallocarray.c7
15 files changed, 104 insertions, 40 deletions
diff --git a/LICENSE b/LICENSE
index d8d00fe7..35072fb2 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,4 +1,4 @@
-$Id: LICENSE,v 1.1 2014/04/22 22:03:22 schwarze Exp $
+$Id: LICENSE,v 1.2 2014/04/23 21:06:41 schwarze Exp $
With the exceptions noted below, all code and documentation
contained in the mdocml toolkit is protected by the Copyright
@@ -10,6 +10,7 @@ Copyright (c) 2009, 2010, 2011, 2012 Joerg Sonnenberger <joerg@netbsd.org>
Copyright (c) 2013 Franco Fichtner <franco@lastsummer.de>
Copyright (c) 1999, 2004 Marc Espie <espie@openbsd.org>
Copyright (c) 1998, 2010 Todd C. Miller <Todd.Miller@courtesan.com>
+Copyright (c) 2008 Otto Moerbeek <otto@drijf.net>
Copyright (c) 2003 Jason McIntyre <jmc@openbsd.org>
See the individual source files for information about who contributed
diff --git a/Makefile b/Makefile
index c9c8a844..57f3ce7f 100644
--- a/Makefile
+++ b/Makefile
@@ -64,6 +64,7 @@ TESTSRCS = test-fgetln.c \
test-getsubopt.c \
test-mmap.c \
test-ohash.c \
+ test-reallocarray.c \
test-strlcat.c \
test-strlcpy.c \
test-strnlen.c \
@@ -86,6 +87,7 @@ SRCS = LICENSE \
compat_getsubopt.c \
compat_ohash.c \
compat_ohash.h \
+ compat_reallocarray.c \
compat_strcasestr.c \
compat_strlcat.c \
compat_strlcpy.c \
@@ -213,6 +215,7 @@ LIBMANDOC_OBJS = $(LIBMAN_OBJS) \
COMPAT_OBJS = compat_fgetln.o \
compat_getsubopt.o \
compat_ohash.o \
+ compat_reallocarray.o \
compat_strcasestr.o \
compat_strlcat.o \
compat_strlcpy.o \
diff --git a/compat_reallocarray.c b/compat_reallocarray.c
new file mode 100644
index 00000000..e25d8374
--- /dev/null
+++ b/compat_reallocarray.c
@@ -0,0 +1,45 @@
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#ifdef HAVE_REALLOCARRAY
+
+int dummy;
+
+#else
+
+/* $OpenBSD: malloc.c,v 1.158 2014/04/23 15:07:27 tedu Exp $ */
+/*
+ * Copyright (c) 2008 Otto Moerbeek <otto@drijf.net>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+#include <sys/types.h>
+#include <errno.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+#define MUL_NO_OVERFLOW (1UL << (sizeof(size_t) * 4))
+
+void *
+reallocarray(void *optr, size_t nmemb, size_t size)
+{
+ if ((nmemb >= MUL_NO_OVERFLOW || size >= MUL_NO_OVERFLOW) &&
+ nmemb > 0 && SIZE_MAX / nmemb < size) {
+ errno = ENOMEM;
+ return NULL;
+ }
+ return realloc(optr, size * nmemb);
+}
+
+#endif /*!HAVE_REALLOCARRAY*/
diff --git a/configure b/configure
index 5a24bb58..1e4788c9 100755
--- a/configure
+++ b/configure
@@ -34,6 +34,7 @@ runtest fgetln FGETLN
runtest getsubopt GETSUBOPT
runtest mmap MMAP
runtest ohash OHASH
+runtest reallocarray REALLOCARRAY
runtest strcasestr STRCASESTR
runtest strlcat STRLCAT
runtest strlcpy STRLCPY
diff --git a/eqn.c b/eqn.c
index 12b00e51..57cbfca1 100644
--- a/eqn.c
+++ b/eqn.c
@@ -1,4 +1,4 @@
-/* $Id: eqn.c,v 1.41 2014/04/20 19:40:13 schwarze Exp $ */
+/* $Id: eqn.c,v 1.42 2014/04/23 21:06:41 schwarze Exp $ */
/*
* Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv>
*
@@ -864,8 +864,8 @@ eqn_do_define(struct eqn_node *ep)
if (i == (int)ep->defsz) {
ep->defsz++;
- ep->defs = mandoc_realloc(ep->defs,
- ep->defsz * sizeof(struct eqn_def));
+ ep->defs = mandoc_reallocarray(ep->defs,
+ ep->defsz, sizeof(struct eqn_def));
ep->defs[i].key = ep->defs[i].val = NULL;
}
diff --git a/mandoc_aux.c b/mandoc_aux.c
index 25666a27..a4cb3c19 100644
--- a/mandoc_aux.c
+++ b/mandoc_aux.c
@@ -1,4 +1,4 @@
-/* $Id: mandoc_aux.c,v 1.1 2014/03/23 11:59:17 schwarze Exp $ */
+/* $Id: mandoc_aux.c,v 1.2 2014/04/23 21:06:41 schwarze Exp $ */
/*
* Copyright (c) 2009, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
* Copyright (c) 2014 Ingo Schwarze <schwarze@openbsd.org>
@@ -80,6 +80,18 @@ mandoc_realloc(void *ptr, size_t size)
return(ptr);
}
+void *
+mandoc_reallocarray(void *ptr, size_t num, size_t size)
+{
+
+ ptr = reallocarray(ptr, num, size);
+ if (NULL == ptr) {
+ perror(NULL);
+ exit((int)MANDOCLEVEL_SYSERR);
+ }
+ return(ptr);
+}
+
char *
mandoc_strdup(const char *ptr)
{
diff --git a/mandoc_aux.h b/mandoc_aux.h
index 7cdbde2e..04f4baff 100644
--- a/mandoc_aux.h
+++ b/mandoc_aux.h
@@ -1,4 +1,4 @@
-/* $Id: mandoc_aux.h,v 1.1 2014/03/23 11:59:17 schwarze Exp $ */
+/* $Id: mandoc_aux.h,v 1.2 2014/04/23 21:06:41 schwarze Exp $ */
/*
* Copyright (c) 2009, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
* Copyright (c) 2014 Ingo Schwarze <schwarze@openbsd.org>
@@ -24,6 +24,7 @@ int mandoc_asprintf(char **, const char *, ...);
void *mandoc_calloc(size_t, size_t);
void *mandoc_malloc(size_t);
void *mandoc_realloc(void *, size_t);
+void *mandoc_reallocarray(void *, size_t, size_t);
char *mandoc_strdup(const char *);
char *mandoc_strndup(const char *, size_t);
diff --git a/mandocdb.c b/mandocdb.c
index ddd9f165..4e4c37c6 100644
--- a/mandocdb.c
+++ b/mandocdb.c
@@ -1,4 +1,4 @@
-/* $Id: mandocdb.c,v 1.143 2014/04/23 19:09:16 schwarze Exp $ */
+/* $Id: mandocdb.c,v 1.144 2014/04/23 21:06:41 schwarze Exp $ */
/*
* Copyright (c) 2011, 2012 Kristaps Dzonsons <kristaps@bsd.lv>
* Copyright (c) 2011, 2012, 2013, 2014 Ingo Schwarze <schwarze@openbsd.org>
@@ -471,8 +471,8 @@ main(int argc, char *argv[])
* manpath_parse() wants to do it.
*/
if (argc > 0) {
- dirs.paths = mandoc_calloc(argc,
- sizeof(char *));
+ dirs.paths = mandoc_reallocarray(NULL,
+ argc, sizeof(char *));
dirs.sz = (size_t)argc;
for (i = 0; i < argc; i++)
dirs.paths[i] = mandoc_strdup(argv[i]);
@@ -1784,7 +1784,7 @@ putkeys(const struct mpage *mpage,
s->mask |= v;
return;
} else if (NULL == s) {
- s = mandoc_calloc(sizeof(struct str) + sz + 1, 1);
+ s = mandoc_calloc(1, sizeof(struct str) + sz + 1);
memcpy(s->key, cp, sz);
ohash_insert(htab, slot, s);
}
@@ -2314,7 +2314,7 @@ static void *
hash_halloc(size_t sz, void *arg)
{
- return(mandoc_calloc(sz, 1));
+ return(mandoc_calloc(1, sz));
}
static void *
diff --git a/manpath.c b/manpath.c
index 01635cd8..61b2c7e0 100644
--- a/manpath.c
+++ b/manpath.c
@@ -1,4 +1,4 @@
-/* $Id: manpath.c,v 1.14 2014/04/20 16:46:05 schwarze Exp $ */
+/* $Id: manpath.c,v 1.15 2014/04/23 21:06:41 schwarze Exp $ */
/*
* Copyright (c) 2011 Ingo Schwarze <schwarze@openbsd.org>
* Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv>
@@ -169,8 +169,8 @@ manpath_add(struct manpaths *dirs, const char *dir)
if (0 == strcmp(dirs->paths[i], dir))
return;
- dirs->paths = mandoc_realloc(dirs->paths,
- (dirs->sz + 1) * sizeof(char *));
+ dirs->paths = mandoc_reallocarray(dirs->paths,
+ dirs->sz + 1, sizeof(char *));
dirs->paths[dirs->sz++] = mandoc_strdup(cp);
}
diff --git a/mansearch.c b/mansearch.c
index eec5ff13..f9892218 100644
--- a/mansearch.c
+++ b/mansearch.c
@@ -1,4 +1,4 @@
-/* $Id: mansearch.c,v 1.35 2014/04/23 16:34:50 schwarze Exp $ */
+/* $Id: mansearch.c,v 1.36 2014/04/23 21:06:41 schwarze Exp $ */
/*
* Copyright (c) 2012 Kristaps Dzonsons <kristaps@bsd.lv>
* Copyright (c) 2013, 2014 Ingo Schwarze <schwarze@openbsd.org>
@@ -328,8 +328,8 @@ mansearch(const struct mansearch *search,
mp = ohash_next(&htab, &idx)) {
if (cur + 1 > maxres) {
maxres += 1024;
- *res = mandoc_realloc(*res,
- maxres * sizeof(struct manpage));
+ *res = mandoc_reallocarray(*res,
+ maxres, sizeof(struct manpage));
}
mpage = *res + cur;
mpage->form = mp->form;
@@ -793,7 +793,7 @@ static void *
hash_halloc(size_t sz, void *arg)
{
- return(mandoc_calloc(sz, 1));
+ return(mandoc_calloc(1, sz));
}
static void *
diff --git a/mdoc_argv.c b/mdoc_argv.c
index f75b5406..e411d51a 100644
--- a/mdoc_argv.c
+++ b/mdoc_argv.c
@@ -1,4 +1,4 @@
-/* $Id: mdoc_argv.c,v 1.92 2014/04/20 16:46:05 schwarze Exp $ */
+/* $Id: mdoc_argv.c,v 1.93 2014/04/23 21:06:41 schwarze Exp $ */
/*
* Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
* Copyright (c) 2012 Ingo Schwarze <schwarze@openbsd.org>
@@ -359,8 +359,8 @@ mdoc_argv(struct mdoc *mdoc, int line, enum mdoct tok,
arg = *v = mandoc_calloc(1, sizeof(struct mdoc_arg));
arg->argc++;
- arg->argv = mandoc_realloc(arg->argv,
- arg->argc * sizeof(struct mdoc_argv));
+ arg->argv = mandoc_reallocarray(arg->argv,
+ arg->argc, sizeof(struct mdoc_argv));
memcpy(&arg->argv[(int)arg->argc - 1], &tmp,
sizeof(struct mdoc_argv));
@@ -667,8 +667,8 @@ argv_multi(struct mdoc *mdoc, int line,
break;
if (0 == v->sz % MULTI_STEP)
- v->value = mandoc_realloc(v->value,
- (v->sz + MULTI_STEP) * sizeof(char *));
+ v->value = mandoc_reallocarray(v->value,
+ v->sz + MULTI_STEP, sizeof(char *));
v->value[(int)v->sz] = mandoc_strdup(p);
}
diff --git a/mdoc_validate.c b/mdoc_validate.c
index 8c394328..7cd856c6 100644
--- a/mdoc_validate.c
+++ b/mdoc_validate.c
@@ -1,4 +1,4 @@
-/* $Id: mdoc_validate.c,v 1.213 2014/04/23 16:08:33 schwarze Exp $ */
+/* $Id: mdoc_validate.c,v 1.214 2014/04/23 21:06:41 schwarze Exp $ */
/*
* Copyright (c) 2008-2012 Kristaps Dzonsons <kristaps@bsd.lv>
* Copyright (c) 2010-2014 Ingo Schwarze <schwarze@openbsd.org>
@@ -1460,8 +1460,8 @@ post_bl_block_tag(POST_ARGS)
assert(n->args);
i = (int)(n->args->argc)++;
- n->args->argv = mandoc_realloc(n->args->argv,
- n->args->argc * sizeof(struct mdoc_argv));
+ n->args->argv = mandoc_reallocarray(n->args->argv,
+ n->args->argc, sizeof(struct mdoc_argv));
n->args->argv[i].arg = MDOC_Width;
n->args->argv[i].line = n->line;
@@ -1521,8 +1521,8 @@ post_bl_head(POST_ARGS)
*/
np->args->argv[j].sz = (size_t)mdoc->last->nchild;
- np->args->argv[j].value = mandoc_malloc(
- (size_t)mdoc->last->nchild * sizeof(char *));
+ np->args->argv[j].value = mandoc_reallocarray(NULL,
+ (size_t)mdoc->last->nchild, sizeof(char *));
mdoc->last->norm->Bl.ncols = np->args->argv[j].sz;
mdoc->last->norm->Bl.cols = (void *)np->args->argv[j].value;
diff --git a/term.c b/term.c
index b0320ea6..c6a40150 100644
--- a/term.c
+++ b/term.c
@@ -1,4 +1,4 @@
-/* $Id: term.c,v 1.222 2014/04/20 16:46:05 schwarze Exp $ */
+/* $Id: term.c,v 1.223 2014/04/23 21:06:41 schwarze Exp $ */
/*
* Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
* Copyright (c) 2010-2014 Ingo Schwarze <schwarze@openbsd.org>
@@ -522,7 +522,7 @@ adjbuf(struct termp *p, size_t sz)
while (sz >= p->maxcols)
p->maxcols <<= 2;
- p->buf = mandoc_realloc(p->buf, sizeof(int) * p->maxcols);
+ p->buf = mandoc_reallocarray(p->buf, p->maxcols, sizeof(int));
}
static void
diff --git a/term_ps.c b/term_ps.c
index f4fd7501..f274c150 100644
--- a/term_ps.c
+++ b/term_ps.c
@@ -1,4 +1,4 @@
-/* $Id: term_ps.c,v 1.59 2014/04/20 16:46:05 schwarze Exp $ */
+/* $Id: term_ps.c,v 1.60 2014/04/23 21:06:41 schwarze Exp $ */
/*
* Copyright (c) 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
* Copyright (c) 2014 Ingo Schwarze <schwarze@openbsd.org>
@@ -628,12 +628,8 @@ pdf_obj(struct termp *p, size_t obj)
if ((obj - 1) >= p->ps->pdfobjsz) {
p->ps->pdfobjsz = obj + 128;
- p->ps->pdfobjs = realloc(p->ps->pdfobjs,
- p->ps->pdfobjsz * sizeof(size_t));
- if (NULL == p->ps->pdfobjs) {
- perror(NULL);
- exit((int)MANDOCLEVEL_SYSERR);
- }
+ p->ps->pdfobjs = mandoc_reallocarray(p->ps->pdfobjs,
+ p->ps->pdfobjsz, sizeof(size_t));
}
p->ps->pdfobjs[(int)obj - 1] = p->ps->pdfbytes;
@@ -1169,7 +1165,5 @@ ps_growbuf(struct termp *p, size_t sz)
sz = PS_BUFSLOP;
p->ps->psmargsz += sz;
-
- p->ps->psmarg = mandoc_realloc
- (p->ps->psmarg, p->ps->psmargsz);
+ p->ps->psmarg = mandoc_realloc(p->ps->psmarg, p->ps->psmargsz);
}
diff --git a/test-reallocarray.c b/test-reallocarray.c
new file mode 100644
index 00000000..9a514e8e
--- /dev/null
+++ b/test-reallocarray.c
@@ -0,0 +1,7 @@
+#include <stdlib.h>
+
+int
+main(void)
+{
+ return( ! reallocarray(NULL, 2, 2));
+}
generated by cgit v1.2.3-56-ge451 (git 2.39.0) at 2024-06-16 07:55:52 +0000