[Bug 2959] New: spamc -d causes seg fault when host cannot resolve

[bu...@bugzilla.spamassassin.org]

http://bugzilla.spamassassin.org/show_bug.cgi?id=2959

           Summary: spamc -d causes seg fault when host cannot resolve
           Product: Spamassassin
           Version: 2.61
          Platform: All
        OS/Version: Linux
            Status: NEW
          Severity: trivial
          Priority: P1
         Component: spamc/spamd
        AssignedTo: spamassassin-dev@incubator.apache.org
        ReportedBy: dallase@nmgi.com


i've only tested this on 2.61 on redhat 7.3, havent had time to install 2.63 
yet... but from searching bugs, i dont see this fixed in 2.62 and 2.63....  
with or without the -H flag, it has the same results...

[root@localhost]# echo "" | /usr/bin/spamc -dtest1 -H
Segmentation fault

if you add test1 to /etc/hosts and run it again, it works fine.

this could cause big problems for people that use dns round robin setups for 
load balancing spamd's if their dns goes down.  actually, if their dns goes 
down, they probably have even bigger problems... nonetheless, they could be 
running the spamd's without network tests which dont need dns to function.

from the looks of it, it tries to make a connect() even though dns couldnt 
return a valid ip for the host.

socket(PF_UNIX, SOCK_DGRAM, 0)          = 3
fcntl64(3, F_SETFD, FD_CLOEXEC)         = 0
connect(3, {sin_family=AF_UNIX, path="/dev/log"}, 16) = 0
send(3, "<19>Jan 23 16:17:06 spamc[24903]"..., 72, 0) = 72
rt_sigaction(SIGPIPE, {SIG_IGN}, NULL, 8) = 0

probably needs a little error checking.



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