commit d4f05dcd0e0fe654d64950d70d6d54ff7a6a280e Author: Nick Mathewson nickm@torproject.org Date: Wed Aug 31 14:30:34 2016 -0400

Detect and suppress bug message from zlib compression bomb test --- src/test/log_test_helpers.h | 7 +++++++ src/test/test_util.c | 9 ++++++++- 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/src/test/log_test_helpers.h b/src/test/log_test_helpers.h index 039c7ae..f33ee67 100644 --- a/src/test/log_test_helpers.h +++ b/src/test/log_test_helpers.h @@ -35,6 +35,13 @@ int mock_saved_log_has_entry(void); tt_assert_msg(mock_saved_log_has_message_containing(str), \ "expected log to contain " # str);

+#define expect_single_log_msg_containing(str) \ + do { \ + tt_assert_msg(mock_saved_log_has_message_containing(str), \ + "expected log to contain " # str); \ + tt_int_op(smartlist_len(mock_saved_logs()), OP_EQ, 1); \ + } while (0); + #define expect_no_log_msg(str) \ tt_assert_msg(!mock_saved_log_has_message(str), \ "expected log to not contain " # str); diff --git a/src/test/test_util.c b/src/test/test_util.c index 061398c..2ff9d77 100644 --- a/src/test/test_util.c +++ b/src/test/test_util.c @@ -2216,10 +2216,17 @@ test_util_gzip_compression_bomb(void *arg) size_t result_len = 0; tor_zlib_state_t *state = NULL;

+ /* Make sure we can't produce a compression bomb */ + const int prev_level = setup_full_capture_of_logs(LOG_WARN); tt_int_op(-1, OP_EQ, tor_gzip_compress(&result, &result_len, one_mb, one_million, ZLIB_METHOD)); + expect_single_log_msg_containing( + "We compressed something and got an insanely high " + "compression factor; other Tors would think this " + "was a zlib bomb."); + teardown_capture_of_logs(prev_level);

/* Here's a compression bomb that we made manually. */ const char compression_bomb[1039] = @@ -5464,7 +5471,7 @@ struct testcase_t util_tests[] = { UTIL_LEGACY(strmisc), UTIL_LEGACY(pow2), UTIL_LEGACY(gzip), - UTIL_LEGACY(gzip_compression_bomb), + UTIL_TEST(gzip_compression_bomb, TT_FORK), UTIL_LEGACY(datadir), UTIL_LEGACY(memarea), UTIL_LEGACY(control_formats),