Wietse Venema via Postfix-devel: > > There is an unnecessary double check of the "addr_list" pointer for null > > (twice). It does no harm, and a good compiler will remove that test. > Generally, I don't worry about repeated tests like this. They make > Postfix code a bit easier to maintain, because there are fewer > implicit dependencies. > > > In posttls-finger there are problems with using "service" char pointer in > > logging. I initialized the variable > > to null and ensured that it does not point into already freed space. > > Yeah, that is the result of clumsy memory management and should be fixed. > > I'll try to make this more obviously correct without adding multiple > instances of "if (bah != 0) myfree(bah);" throughout the code, > because it's too easy to forget adding another instance when the > code is updated.
I simplified the code as with patch below. This 1) fixes the warning message when the destination in "dest" contains ":service" information, and 2) limits the visibility of some temporary variables. Wietse 20230517 Bugfix (defect introduced: Postfix 3.8) the posttls-finger command could access uninitialized memory when reconnecting. Reported by Thomas Korbar. File: posttls-finger/posttls-finger.c. diff '--exclude=man' '--exclude=html' '--exclude=README_FILES' '--exclude=INSTALL' '--exclude=.indent.pro' -r -ur /var/tmp/postfix-3.9-20230516/src/posttls-finger/posttls-finger.c ./src/posttls-finger/posttls-finger.c --- /var/tmp/postfix-3.9-20230516/src/posttls-finger/posttls-finger.c 2023-04-13 10:16:06.000000000 -0400 +++ ./src/posttls-finger/posttls-finger.c 2023-05-16 13:46:27.593011475 -0400 @@ -1590,12 +1590,13 @@ static void connect_remote(STATE *state, char *dest) { DNS_RR *addr; - char *buf; - char *domain; - char *service; /* When reconnecting use IP address of previous session */ if (state->addr == 0) { + char *buf; + char *domain; + char *service; + buf = parse_destination(dest, state->smtp ? "smtp" : "24", &domain, &service, &state->port); if (!state->nexthop) @@ -1622,8 +1623,8 @@ if (level == TLS_LEV_INVALID || (state->stream = connect_addr(state, addr)) == 0) { - msg_info("Failed to establish session to %s:%s via %s:%u: %s", - dest, service, HNAME(addr), addr->port, + msg_info("Failed to establish session to %s via %s:%u: %s", + dest, HNAME(addr), addr->port, vstring_str(state->why->reason)); continue; } _______________________________________________ Postfix-devel mailing list -- postfix-devel@postfix.org To unsubscribe send an email to postfix-devel-le...@postfix.org