[tor/master] Fix buffer over-reads in the rendcache tests
commit c94aa4573ab571af233e83f539844f3ccdd9fc2b Author: cypherpunks <cypherpunks@torproject.org> Date: Wed Nov 11 14:47:35 2015 +0100 Fix buffer over-reads in the rendcache tests The hidden service descriptor cache (rendcache) tests use digest maps which expect keys to have a length of DIGEST_LEN. Because the tests use key strings with a length lower than DIGEST_LEN, the internal copy operation reads outside the key strings which leads to buffer over-reads. The issue is resolved by using character arrays with a size of DIGEST_LEN. Patch on ade5005853c17b3ae5923c194680442e0f86db4d. --- src/test/test_rendcache.c | 49 +++++++++++++++++++++++++++------------------ 1 file changed, 29 insertions(+), 20 deletions(-) diff --git a/src/test/test_rendcache.c b/src/test/test_rendcache.c index 92adf01..958c83a 100644 --- a/src/test/test_rendcache.c +++ b/src/test/test_rendcache.c @@ -767,28 +767,31 @@ test_rend_cache_failure_intro_lookup(void *data) rend_cache_failure_t *failure; rend_cache_failure_intro_t *ip; rend_cache_failure_intro_t *entry; + const char key_ip_one[DIGEST_LEN] = "ip1"; + const char key_ip_two[DIGEST_LEN] = "ip2"; + const char key_foo[DIGEST_LEN] = "foo1"; rend_cache_init(); failure = rend_cache_failure_entry_new(); ip = rend_cache_failure_intro_entry_new(INTRO_POINT_FAILURE_TIMEOUT); - digestmap_set(failure->intro_failures, "ip1", ip); + digestmap_set(failure->intro_failures, key_ip_one, ip); strmap_set_lc(rend_cache_failure, "foo1", failure); // Test not found - ret = cache_failure_intro_lookup((const uint8_t *)"foo1", "foo2", NULL); + ret = cache_failure_intro_lookup((const uint8_t *) key_foo, "foo2", NULL); tt_int_op(ret, OP_EQ, 0); // Test found with no intro failures in it - ret = cache_failure_intro_lookup((const uint8_t *)"ip2", "foo1", NULL); + ret = cache_failure_intro_lookup((const uint8_t *) key_ip_two, "foo1", NULL); tt_int_op(ret, OP_EQ, 0); // Test found - ret = cache_failure_intro_lookup((const uint8_t *)"ip1", "foo1", NULL); + ret = cache_failure_intro_lookup((const uint8_t *) key_ip_one, "foo1", NULL); tt_int_op(ret, OP_EQ, 1); // Test found and asking for entry - cache_failure_intro_lookup((const uint8_t *)"ip1", "foo1", &entry); + cache_failure_intro_lookup((const uint8_t *) key_ip_one, "foo1", &entry); tt_assert(entry); tt_assert(entry == ip); @@ -892,6 +895,9 @@ test_rend_cache_failure_clean(void *data) rend_cache_failure_t *failure; rend_cache_failure_intro_t *ip_one, *ip_two; + const char key_one[DIGEST_LEN] = "ip1"; + const char key_two[DIGEST_LEN] = "ip2"; + (void)data; rend_cache_init(); @@ -909,7 +915,7 @@ test_rend_cache_failure_clean(void *data) // Test with one new intro point failure = rend_cache_failure_entry_new(); ip_one = rend_cache_failure_intro_entry_new(INTRO_POINT_FAILURE_TIMEOUT); - digestmap_set(failure->intro_failures, "ip1", ip_one); + digestmap_set(failure->intro_failures, key_one, ip_one); strmap_set_lc(rend_cache_failure, "foo1", failure); rend_cache_failure_clean(time(NULL)); tt_int_op(strmap_size(rend_cache_failure), OP_EQ, 1); @@ -919,7 +925,7 @@ test_rend_cache_failure_clean(void *data) failure = rend_cache_failure_entry_new(); ip_one = rend_cache_failure_intro_entry_new(INTRO_POINT_FAILURE_TIMEOUT); ip_one->created_ts = time(NULL) - 7*60; - digestmap_set(failure->intro_failures, "ip1", ip_one); + digestmap_set(failure->intro_failures, key_one, ip_one); strmap_set_lc(rend_cache_failure, "foo1", failure); rend_cache_failure_clean(time(NULL)); tt_int_op(strmap_size(rend_cache_failure), OP_EQ, 0); @@ -929,10 +935,10 @@ test_rend_cache_failure_clean(void *data) failure = rend_cache_failure_entry_new(); ip_one = rend_cache_failure_intro_entry_new(INTRO_POINT_FAILURE_TIMEOUT); ip_one->created_ts = time(NULL) - 7*60; - digestmap_set(failure->intro_failures, "ip1", ip_one); + digestmap_set(failure->intro_failures, key_one, ip_one); ip_two = rend_cache_failure_intro_entry_new(INTRO_POINT_FAILURE_TIMEOUT); ip_two->created_ts = time(NULL) - 2*60; - digestmap_set(failure->intro_failures, "ip2", ip_two); + digestmap_set(failure->intro_failures, key_two, ip_two); strmap_set_lc(rend_cache_failure, "foo1", failure); rend_cache_failure_clean(time(NULL)); tt_int_op(strmap_size(rend_cache_failure), OP_EQ, 1); @@ -1051,25 +1057,26 @@ test_rend_cache_failure_intro_add(void *data) (void)data; rend_cache_failure_t *fail_entry; rend_cache_failure_intro_t *entry; + const char identity[DIGEST_LEN] = "foo1"; rend_cache_init(); // Adds non-existing entry - cache_failure_intro_add((const uint8_t *)"foo1", "foo2", + cache_failure_intro_add((const uint8_t *) identity, "foo2", INTRO_POINT_FAILURE_TIMEOUT); fail_entry = strmap_get_lc(rend_cache_failure, "foo2"); tt_assert(fail_entry); tt_int_op(digestmap_size(fail_entry->intro_failures), OP_EQ, 1); - entry = digestmap_get(fail_entry->intro_failures, "foo1"); + entry = digestmap_get(fail_entry->intro_failures, identity); tt_assert(entry); // Adds existing entry - cache_failure_intro_add((const uint8_t *)"foo1", "foo2", + cache_failure_intro_add((const uint8_t *) identity, "foo2", INTRO_POINT_FAILURE_TIMEOUT); fail_entry = strmap_get_lc(rend_cache_failure, "foo2"); tt_assert(fail_entry); tt_int_op(digestmap_size(fail_entry->intro_failures), OP_EQ, 1); - entry = digestmap_get(fail_entry->intro_failures, "foo1"); + entry = digestmap_get(fail_entry->intro_failures, identity); tt_assert(entry); done: @@ -1082,22 +1089,23 @@ test_rend_cache_intro_failure_note(void *data) (void)data; rend_cache_failure_t *fail_entry; rend_cache_failure_intro_t *entry; + const char key[DIGEST_LEN] = "foo1"; rend_cache_init(); // Test not found rend_cache_intro_failure_note(INTRO_POINT_FAILURE_TIMEOUT, - (const uint8_t *)"foo1", "foo2"); + (const uint8_t *) key, "foo2"); fail_entry = strmap_get_lc(rend_cache_failure, "foo2"); tt_assert(fail_entry); tt_int_op(digestmap_size(fail_entry->intro_failures), OP_EQ, 1); - entry = digestmap_get(fail_entry->intro_failures, "foo1"); + entry = digestmap_get(fail_entry->intro_failures, key); tt_assert(entry); tt_int_op(entry->failure_type, OP_EQ, INTRO_POINT_FAILURE_TIMEOUT); // Test found rend_cache_intro_failure_note(INTRO_POINT_FAILURE_UNREACHABLE, - (const uint8_t *)"foo1", "foo2"); + (const uint8_t *) key, "foo2"); tt_int_op(entry->failure_type, OP_EQ, INTRO_POINT_FAILURE_UNREACHABLE); done: @@ -1121,6 +1129,7 @@ test_rend_cache_clean_v2_descs_as_dir(void *data) time_t now; rend_service_descriptor_t *desc; now = time(NULL); + const char key[DIGEST_LEN] = "abcde"; (void)data; @@ -1138,7 +1147,7 @@ test_rend_cache_clean_v2_descs_as_dir(void *data) desc->timestamp = now; desc->pk = pk_generate(0); e->parsed = desc; - digestmap_set(rend_cache_v2_dir, "abcde", e); + digestmap_set(rend_cache_v2_dir, key, e); hid_serv_responsible_for_desc_id_response = 1; rend_cache_clean_v2_descs_as_dir(now, 0); @@ -1157,7 +1166,7 @@ test_rend_cache_clean_v2_descs_as_dir(void *data) desc->timestamp = now; desc->pk = pk_generate(0); e->parsed = desc; - digestmap_set(rend_cache_v2_dir, "abcde", e); + digestmap_set(rend_cache_v2_dir, key, e); hid_serv_responsible_for_desc_id_response = 0; rend_cache_clean_v2_descs_as_dir(now, 0); @@ -1170,7 +1179,7 @@ test_rend_cache_clean_v2_descs_as_dir(void *data) desc->timestamp = now; desc->pk = pk_generate(0); e->parsed = desc; - digestmap_set(rend_cache_v2_dir, "abcde", e); + digestmap_set(rend_cache_v2_dir, key, e); hid_serv_responsible_for_desc_id_response = 1; rend_cache_clean_v2_descs_as_dir(now, 0); @@ -1183,7 +1192,7 @@ test_rend_cache_clean_v2_descs_as_dir(void *data) desc->timestamp = now; desc->pk = pk_generate(0); e->parsed = desc; - digestmap_set(rend_cache_v2_dir, "abcde", e); + digestmap_set(rend_cache_v2_dir, key, e); hid_serv_responsible_for_desc_id_response = 1; rend_cache_clean_v2_descs_as_dir(now, 20000);
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