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Bug 40827: Add additional logs and checks for 0-leg conflux case

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This commit is contained in:
Mike Perry 2023-07-31 15:30:09 +00:00
parent 5487476fd9
commit e3ad41e7e5
2 changed files with 37 additions and 4 deletions
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23
src/core/or/conflux.c
View File

@ -536,7 +536,7 @@ conflux_note_cell_sent(conflux_t *cfx, circuit_t *circ, uint8_t relay_command)
/** Find the leg with lowest non-zero curr_rtt_usec, and
* pick it for our current leg. */
static inline void
static inline bool
conflux_pick_first_leg(conflux_t *cfx)
{
conflux_leg_t *min_leg = NULL;
@ -555,8 +555,20 @@ conflux_pick_first_leg(conflux_t *cfx)
} CONFLUX_FOR_EACH_LEG_END(leg);
if (!min_leg) {
// Get the 0th leg; if it does not exist, assert
tor_assert(smartlist_len(cfx->legs) > 0);
// Get the 0th leg; if it does not exist, log the set.
// Bug 40827 managed to hit this, so let's dump the sets
// in case it happens again.
if (BUG(smartlist_len(cfx->legs) <= 0)) {
// Since we have no legs, we have no idea if this is really a client
// or server set. Try to find any that match:
log_warn(LD_BUG, "Matching client sets:");
conflux_log_set(cfx, true);
log_warn(LD_BUG, "Matching server sets:");
conflux_log_set(cfx, false);
log_warn(LD_BUG, "End conflux set dump");
return false;
}
min_leg = smartlist_get(cfx->legs, 0);
tor_assert(min_leg);
if (BUG(min_leg->linked_sent_usec == 0)) {
@ -572,6 +584,8 @@ conflux_pick_first_leg(conflux_t *cfx)
cfx->cells_until_switch = 0;
cfx->curr_leg = min_leg;
return true;
}
/**
@ -589,7 +603,8 @@ conflux_decide_next_circ(conflux_t *cfx)
/* If we don't have a current leg yet, pick one.
* (This is the only non-const operation in this function). */
if (!cfx->curr_leg) {
conflux_pick_first_leg(cfx);
if (!conflux_pick_first_leg(cfx))
return NULL;
}
/* First, check if we can switch. */

18
src/core/or/relay.c
View File

@ -2352,6 +2352,24 @@ connection_edge_package_raw_inbuf(edge_connection_t *conn, int package_partial,
return -1;
}
// Bug 40827: With conflux, we suspect marked circuits were getting here.
// We think we fixed it, but let's add a check and log sets if it still
// happens.
if (BUG(circ->marked_for_close)) {
log_warn(LD_BUG,
"called on circ that's already marked for close at %s:%d.",
circ->marked_for_close_file, circ->marked_for_close);
if (CIRCUIT_IS_CONFLUX(circ)) {
if (circ->conflux) {
conflux_log_set(circ->conflux, CIRCUIT_IS_ORIGIN(circ));
} else {
log_warn(LD_BUG, " - circ is unlinked conflux");
}
}
conn->end_reason = END_STREAM_REASON_INTERNAL;
return -1;
}
if (circuit_consider_stop_edge_reading(circ, cpath_layer))
return 0;