From e6758b20940d64a2c34cd5938b8b735d6b1800e9 Mon Sep 17 00:00:00 2001 From: Neil Horman Date: Fri, 2 Feb 2024 08:10:32 -0500 Subject: [PATCH] Fix potential divide by zero error Coverity caught the following issues: 1591477 1591475 1591473 1591470 all of which are simmilar, in that they catch potential divide by zero in double values. It can't actually happen since the the threads which increment these counters don't exit until they reach non-zero values, but its easy to add the checks, so lets do that to ensure that we don't change something in the future that causes it. Reviewed-by: Tomas Mraz Reviewed-by: Paul Dale (Merged from https://github.com/openssl/openssl/pull/23462) --- test/threadstest.c | 20 ++++++++++++++++++-- 1 file changed, 18 insertions(+), 2 deletions(-) diff --git a/test/threadstest.c b/test/threadstest.c index 36101b72bfdd0..5b6565a45f74f 100644 --- a/test/threadstest.c +++ b/test/threadstest.c @@ -263,6 +263,11 @@ static int _torture_rw(void) TEST_info("performed %d reads and %d writes over 2 read and 2 write threads in %e seconds", rwreader1_iterations + rwreader2_iterations, rwwriter1_iterations + rwwriter2_iterations, tottime); + if ((rwreader1_iterations + rwreader2_iterations == 0) + || (rwwriter1_iterations + rwwriter2_iterations == 0)) { + TEST_info("Threads did not iterate\n"); + goto out; + } avr = tottime / (rwreader1_iterations + rwreader2_iterations); avw = (tottime / (rwwriter1_iterations + rwwriter2_iterations)); TEST_info("Average read time %e/read", avr); @@ -411,6 +416,7 @@ static int _torture_rcu(void) struct timeval dtime; double tottime; double avr, avw; + int rc = 0; atomiclock = CRYPTO_THREAD_lock_new(); if (!TEST_ptr(atomiclock)) @@ -443,7 +449,7 @@ static int _torture_rcu(void) || !TEST_true(wait_for_thread(writer2)) || !TEST_true(wait_for_thread(reader1)) || !TEST_true(wait_for_thread(reader2))) - return 0; + goto out; t2 = ossl_time_now(); dtime = ossl_time_to_timeval(ossl_time_subtract(t2, t1)); @@ -452,17 +458,27 @@ static int _torture_rcu(void) TEST_info("performed %d reads and %d writes over 2 read and 2 write threads in %e seconds", reader1_iterations + reader2_iterations, writer1_iterations + writer2_iterations, tottime); + if ((reader1_iterations + reader2_iterations == 0) + || (writer1_iterations + writer2_iterations == 0)) { + TEST_info("Threads did not iterate\n"); + goto out; + } avr = tottime / (reader1_iterations + reader2_iterations); avw = tottime / (writer1_iterations + writer2_iterations); TEST_info("Average read time %e/read", avr); TEST_info("Average write time %e/write", avw); + if (!TEST_int_eq(rcu_torture_result, 1)) + goto out; + + rc = 1; +out: ossl_rcu_lock_free(rcu_lock); CRYPTO_THREAD_lock_free(atomiclock); if (!TEST_int_eq(rcu_torture_result, 1)) return 0; - return 1; + return rc; } static int torture_rcu_low(void)