Re: dspam problem

[Martti Kuparinen <martti.kuparinen%iki.fi@localhost>]

I have now a core file so what to do next?

I added some printfs and this crashes the daemon on the Nth call of 
_hash_drv_seek (N is random, small number) because hash_rec_max becomes zero and 
at the same time "header" changes to something else than it was previously.


  fpos = sizeof(struct _hash_drv_header) +
    ((hashcode % header->hash_rec_max) * sizeof(struct _hash_drv_spam_record));

Here're some additional trace:

10088: [04/30/2009 14:48:36] hash_drv.c 1090
10088: [04/30/2009 14:48:36] XXX header=0xbae27000
10088: [04/30/2009 14:48:36] XXX header->hash_rec_max=98317
10088: [04/30/2009 14:48:36] hash_drv.c 1097
10088: [04/30/2009 14:48:36] hash_drv.c 1099
10088: [04/30/2009 14:48:36] hash_drv.c 1090
10088: [04/30/2009 14:48:36] XXX header=0xbae27000
10088: [04/30/2009 14:48:36] XXX header->hash_rec_max=98317
10088: [04/30/2009 14:48:36] hash_drv.c 1097
10088: [04/30/2009 14:48:36] hash_drv.c 1099
10088: [04/30/2009 14:48:36] hash_drv.c 1090
10088: [04/30/2009 14:48:36] XXX header=0xbae27000
10088: [04/30/2009 14:48:36] XXX header->hash_rec_max=98317
10088: [04/30/2009 14:48:36] hash_drv.c 1097
10088: [04/30/2009 14:48:36] hash_drv.c 1099
10088: [04/30/2009 14:48:36] hash_drv.c 1090
10088: [04/30/2009 14:48:36] XXX header=0xbae27000
10088: [04/30/2009 14:48:36] XXX header->hash_rec_max=98317
10088: [04/30/2009 14:48:36] hash_drv.c 1097
10088: [04/30/2009 14:48:36] hash_drv.c 1099
10088: [04/30/2009 14:48:36] hash_drv.c 1090
10088: [04/30/2009 14:48:36] XXX header=0xbae27000
10088: [04/30/2009 14:48:36] XXX header->hash_rec_max=98317
10088: [04/30/2009 14:48:36] hash_drv.c 1097
10088: [04/30/2009 14:48:36] hash_drv.c 1099
10088: [04/30/2009 14:48:36] hash_drv.c 1090
10088: [04/30/2009 14:48:36] XXX header=0xbafa70f8
10088: [04/30/2009 14:48:36] XXX header->hash_rec_max=0



Maybe I need to try some other storage backend since I have no idea what this 
hash code does...




ROOT p141:/usr/pkgsrc/mail/dspam/work/dspam-3.8.0/src> uname -srm
NetBSD 5.0 i386

ROOT p141:/usr/pkgsrc/mail/dspam/work/dspam-3.8.0/src> ./dspam --daemon
515: [04/30/2009 14:33:02] Daemon process starting
Floating point exception (core dumped)
ROOT p141:/usr/pkgsrc/mail/dspam/work/dspam-3.8.0/src> gdb dspam dspam.core
GNU gdb 6.5
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This GDB was configured as "i386--netbsdelf"...
Reading symbols from /usr/lib/libm.so.0...done.
Loaded symbols for /usr/lib/libm.so.0
Reading symbols from /usr/lib/libpthread.so.0...done.
Loaded symbols for /usr/lib/libpthread.so.0
Reading symbols from /usr/lib/libc.so.12...done.
Loaded symbols for /usr/lib/libc.so.12
Reading symbols from /usr/libexec/ld.elf_so...done.
Loaded symbols for /usr/libexec/ld.elf_so
Core was generated by `dspam'.
Program terminated with signal 8, Arithmetic exception.
#0  0x08062c23 in __umoddi3 ()
(gdb) bt
#0  0x08062c23 in __umoddi3 ()
#1  0x0806093e in _hash_drv_seek (map=0xbb511000, offset=1573112,
    hashcode=15509873681730724522, flags=0) at hash_drv.c:1090
#2  0x08060a3d in _hash_drv_get_spamrecord (map=0xbb511000, wrec=0xbb3fdd88)
    at hash_drv.c:1182
#3  0x08060abc in _ds_get_spamrecord (CTX=0xbb51e200,
    token=15509873680409690113, stat=0xbb3fddc4) at hash_drv.c:691
#4  0x08061481 in _ds_getall_spamrecords (CTX=0xbb51e200, diction=0xbb52c5e0)
    at hash_drv.c:612
#5  0x08059759 in _ds_operate (CTX=0xbb51e200,
    headers=0xbb557000 "Received: from xxxxx.org (xxxxx.org 
[xxx.xxx.xxx.xxx])", body=0xbb508000 "On") at libdspam.c:879
#6  0x0805a326 in dspam_process (CTX=0xbb51e200,
    message=0xbb529000 "Received: from xxxxx.org (xxxxx.org 
[xxx.xxx.xxx.xxx])\n\tby xxx.xxxxx.org (Postfix) with ESMTP id 8E5918226A\n\tfor 
<yyy%xxx.xxxxx.org@localhost>; Thu, 30 Apr 2009 14:21:32 +0300 (EEST)\nReceived: by k"...)
    at libdspam.c:578
#7  0x0804fbb1 in process_message (ATX=0xbb527000, message=0xbb522af0,
    username=0xbb52c2c0 "yyy%xxx.xxxxx.org@localhost", result_string=0xbb3ff5b4)
    at dspam.c:514
#8  0x08050b00 in process_users (ATX=0xbb527000, message=0xbb522ad0)
    at dspam.c:1793
#9  0x0805378b in process_connection (ptr=0xbb50f0a0) at daemon.c:721
#10 0xbb7cc9df in pthread_create () from /usr/lib/libpthread.so.0
#11 0xbb718420 in swapcontext () from /usr/lib/libc.so.12