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| author | Yawning Angel <yawning@schwanenlied.me> | 2015-04-02 12:42:06 +0000 |
|---|---|---|
| committer | Nick Mathewson <nickm@torproject.org> | 2015-04-06 09:21:43 -0400 |
| commit | dc3cb0008085d173800724304573dc4ed341c793 (patch) | |
| tree | e61cdcdec2b6f9c0d69c64a7905897f092bf412b | |
| parent | 7b5f558da4542ecce992a8bdb65851fd4a1713bc (diff) | |
| download | tor-dc3cb0008085d173800724304573dc4ed341c793.tar.gz tor-dc3cb0008085d173800724304573dc4ed341c793.zip | |
Handle empty/zero length encoded intro points more gracefully.
In theory these should never the triggered as the only caller now
validates the parameters before this routine gets called.
| -rw-r--r-- | src/or/routerparse.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/src/or/routerparse.c b/src/or/routerparse.c index 01f65f262b..176c16f904 100644 --- a/src/or/routerparse.c +++ b/src/or/routerparse.c @@ -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); |