Segmentation fault using libnss-maria with spamassassin about libnss-maria

[istana]

Hmm, it seems conn may be NULL, but it shouldn't be as there is a check. Is mariadb connector c compiled thread safe? Check this: https://mariadb.com/kb/en/mysql_thread_safe/

[ondrejj]

It's default installation of mariadb from CentOS 8. I think it have to be.
Test:

[root@localhost ~]# cat test.c
#include <stdio.h>
#include <mysql/mysql.h>

int main() {
  printf("%d\n", mysql_thread_safe());
}
[root@localhost ~]# gcc test.c -l mysqlclient
[root@localhost ~]# ./a.out 
1
[root@localhost ~]#

[istana]

Could you try to compile it with VERBOSE=1 flag? It might show something useful in syslog

[ondrejj]

Trying, but why do you think, someone will make more verbose logs, when process segfaults?

Jan 15 13:17:21 mail check[3181416]: spamd: connection from 127.0.0.1 [127.0.0.1]:57846 to port 783, fd 6
Jan 15 13:17:22 mail kernel: spamd child[3181416]: segfault at 20 ip 00007f06576f07d0 sp 00007ffcff05cbc8 error 4 in libmariadb.so.3[7f06576cd000+4a000]
Jan 15 13:17:22 mail kernel: Code: 05 48 83 c4 18 c3 e8 0f 39 ff ff 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 48 8b 87 f0 04 00 00 48 85 c0 74 20 <48> 8b 00 48 85 c0 74 18 48 8b 00 48 85 c0 74 10 48 8b 80 80 00 00

I see nothing special here. Where should be any verbose logs?

[istana]

The segfault is unfortunate, but VERBOSE compile flag will activate very verbose logging to syslog and there should be many additional messages.

[istana]

Hi, I think I fixed these segfaults. Could you test again?