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Extend overflow detection in re_dfa_add_node.

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This commit is contained in:
Ulrich Drepper
2010-01-22 09:48:35 -08:00
parent 54dd0ab31f
commit 2236464488
2 changed files with 10 additions and 2 deletions
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7
posix/regex_internal.c
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@ -1411,8 +1411,11 @@ re_dfa_add_node (re_dfa_t *dfa, re_token_t token)
re_node_set *new_edests, *new_eclosures;
re_token_t *new_nodes;
/* Avoid overflows. */
if (BE (new_nodes_alloc < dfa->nodes_alloc, 0))
/* Avoid overflows in realloc. */
const size_t max_object_size = MAX (sizeof (re_token_t),
MAX (sizeof (re_node_set),
sizeof (int)));
if (BE (SIZE_MAX / max_object_size < new_nodes_alloc, 0))
return -1;
new_nodes = re_realloc (dfa->nodes, re_token_t, new_nodes_alloc);