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Handle empty/zero length encoded intro points more gracefully.

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In theory these should never the triggered as the only caller now
validates the parameters before this routine gets called.
This commit is contained in:
Yawning Angel 2015-04-02 12:42:06 +00:00 committed by Nick Mathewson
parent 7b5f558da4
commit dc3cb00080
1 changed files with 9 additions and 5 deletions
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14
src/or/routerparse.c
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@ -4928,7 +4928,7 @@ rend_parse_introduction_points(rend_service_descriptor_t *parsed,
size_t intro_points_encoded_size)
{
const char *current_ipo, *end_of_intro_points;
smartlist_t *tokens;
smartlist_t *tokens = NULL;
directory_token_t *tok;
rend_intro_point_t *intro;
extend_info_t *info;
@ -4937,8 +4937,10 @@ rend_parse_introduction_points(rend_service_descriptor_t *parsed,
tor_assert(parsed);
/** Function may only be invoked once. */
tor_assert(!parsed->intro_nodes);
tor_assert(intro_points_encoded);
tor_assert(intro_points_encoded_size > 0);
if (!intro_points_encoded || intro_points_encoded_size == 0) {
log_warn(LD_REND, "Empty or zero size introduction point list");
goto err;
}
/* Consider one intro point after the other. */
current_ipo = intro_points_encoded;
end_of_intro_points = intro_points_encoded + intro_points_encoded_size;
@ -5042,8 +5044,10 @@ rend_parse_introduction_points(rend_service_descriptor_t *parsed,
done:
/* Free tokens and clear token list. */
SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_clear(t));
smartlist_free(tokens);
if (tokens) {
SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_clear(t));
smartlist_free(tokens);
}
if (area)
memarea_drop_all(area);