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Merge branch 'maint-0.3.5'

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This commit is contained in:
Nick Mathewson 2018-12-01 11:26:55 -05:00
commit 51d94cea33
3 changed files with 20 additions and 7 deletions
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6
changes/ticket19566 Normal file
View File

@ -0,0 +1,6 @@
o Code simplification and refactoring (shared random, dirauth):
- Change many tor_assert() to use BUG() instead. The idea is to not crash
a dirauth but rather scream loudly with a stacktrace and let it continue
run. The shared random subsystem is very resilient and if anything wrong
happens with it, at worst a non coherent value will be put in the vote
and discarded by the other authorities. Closes ticket 19566.

3
src/feature/dirauth/shared_random.c
View File

@ -949,7 +949,8 @@ sr_compute_srv(void)
/* Computing a shared random value in the commit phase is very wrong. This
* should only happen at the very end of the reveal phase when a new
* protocol run is about to start. */
tor_assert(sr_state_get_phase() == SR_PHASE_REVEAL);
if (BUG(sr_state_get_phase() != SR_PHASE_REVEAL))
return;
state_commits = sr_state_get_commits();
commits = smartlist_new();

18
src/feature/dirauth/shared_random_state.c
View File

@ -595,8 +595,10 @@ disk_state_update(void)
{
config_line_t **next, *line;
tor_assert(sr_disk_state);
tor_assert(sr_state);
if (BUG(!sr_disk_state))
return;
if (BUG(!sr_state))
return;
/* Reset current disk state. */
disk_state_reset();
@ -760,7 +762,8 @@ disk_state_save_to_disk(void)
STATIC void
reset_state_for_new_protocol_run(time_t valid_after)
{
tor_assert(sr_state);
if (BUG(!sr_state))
return;
/* Keep counters in track */
sr_state->n_reveal_rounds = 0;
@ -1092,7 +1095,8 @@ sr_state_update(time_t valid_after)
{
sr_phase_t next_phase;
tor_assert(sr_state);
if (BUG(!sr_state))
return;
/* Don't call this function twice in the same voting period. */
if (valid_after <= sr_state->valid_after) {
@ -1131,7 +1135,8 @@ sr_state_update(time_t valid_after)
/* Count the current round */
if (sr_state->phase == SR_PHASE_COMMIT) {
/* invariant check: we've not entered reveal phase yet */
tor_assert(sr_state->n_reveal_rounds == 0);
if (BUG(sr_state->n_reveal_rounds != 0))
return;
sr_state->n_commit_rounds++;
} else {
sr_state->n_reveal_rounds++;
@ -1321,7 +1326,8 @@ sr_state_init(int save_to_disk, int read_from_disk)
void
set_sr_phase(sr_phase_t phase)
{
tor_assert(sr_state);
if (BUG(!sr_state))
return;
sr_state->phase = phase;
}