commit af26cd61015a2c127dbcf7e3db91da91adb415f9 Author: George Kadianakis desnacked@riseup.net Date: Sat Jun 29 19:46:43 2019 +0300

Always check the retval of circpad_machine_current_state(). --- changes/bug31024 | 4 ++++ src/core/or/circuitpadding.c | 6 ++++++ 2 files changed, 10 insertions(+)

diff --git a/changes/bug31024 b/changes/bug31024 new file mode 100644 index 000000000..888fb2a26 --- /dev/null +++ b/changes/bug31024 @@ -0,0 +1,4 @@ + o Minor bugfixes (circuitpadding): + - Add two NULL checks in unreachable places to silence Coverity (CID 144729 + and 1447291) and better future proof ourselves. Fixes bug 31024; bugfix + on 0.4.1.1-alpha. \ No newline at end of file diff --git a/src/core/or/circuitpadding.c b/src/core/or/circuitpadding.c index 626787da7..c4670bbc2 100644 --- a/src/core/or/circuitpadding.c +++ b/src/core/or/circuitpadding.c @@ -450,6 +450,9 @@ circpad_is_token_removal_supported(circpad_machine_runtime_t *mi) /* Machines that do want token removal are less sensitive to performance. * Let's spend some time to check that our state is consistent and sane */ const circpad_state_t *state = circpad_machine_current_state(mi); + if (BUG(!state)) { + return 1; + } tor_assert_nonfatal(state->token_removal != CIRCPAD_TOKEN_REMOVAL_NONE); tor_assert_nonfatal(state->histogram_len == mi->histogram_len); tor_assert_nonfatal(mi->histogram_len != 0); @@ -1667,6 +1670,9 @@ circpad_estimate_circ_rtt_on_received(circuit_t *circ, } } else { const circpad_state_t *state = circpad_machine_current_state(mi); + if (BUG(!state)) { + return; + }

/* Since monotime is unpredictably expensive, only update this field * if rtt estimates are needed. Otherwise, stop the rtt update. */