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authorUlrich Drepper <drepper@redhat.com>2010-01-22 09:33:01 -0800
committerUlrich Drepper <drepper@redhat.com>2010-01-22 09:33:01 -0800
commit54dd0ab31fe2b2168ba1a6180a0c05941fb54b3c (patch)
tree9e745910f1a8cfb928c6cfdaf812a672f6399d49 /posix/regex_internal.c
parente3b7670be21d6992e3ca9ee1ad3a5d08eb3a24c9 (diff)
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regex: avoid internal re_realloc overflow
Diffstat (limited to 'posix/regex_internal.c')
-rw-r--r--posix/regex_internal.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/posix/regex_internal.c b/posix/regex_internal.c
index ff28e5fcb9..690ed8d8b7 100644
--- a/posix/regex_internal.c
+++ b/posix/regex_internal.c
@@ -133,7 +133,14 @@ re_string_realloc_buffers (re_string_t *pstr, int new_buf_len)
 #ifdef RE_ENABLE_I18N
   if (pstr->mb_cur_max > 1)
     {
-      wint_t *new_wcs = re_realloc (pstr->wcs, wint_t, new_buf_len);
+      wint_t *new_wcs;
+
+      /* Avoid overflow in realloc.  */
+      const size_t max_object_size = MAX (sizeof (wint_t), sizeof (int));
+      if (BE (SIZE_MAX / max_object_size < new_buf_len, 0))
+	return REG_ESPACE;
+
+      new_wcs = re_realloc (pstr->wcs, wint_t, new_buf_len);
       if (BE (new_wcs == NULL, 0))
 	return REG_ESPACE;
       pstr->wcs = new_wcs;