Hi Mark,
>> time->Wed Nov 21 11:08:55 2018 type=PROCTITLE
>> msg=audit(1542816535.125:26908):
>> proctitle=2F7573722F7362696E2F73656E646D61696C002D4643726F6E4461656D6F6E
>> 002D69002D6F6469002D6F656D002D6F69002D74002D6600726F6F74
>> type=SYSCALL msg=audit(1542816535.125:26908): arch=c000003e syscall=2
>> success=yes exit=3 a0=7f52d568d0b8 a1=80000 a2=1b6 a3=24 items=0
>> ppid=54786 pid=55276 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=51
>> sgid=51 fsgid=51 tty=(none) ses=935 comm="sendmail"
>> exe="/usr/sbin/sendmail.sendmail"
>> subj=system_u:system_r:system_mail_t:s0-s0:c0.c1023 key=(null)
>> type=AVC msg=audit(1542816535.125:26908): avc: denied { open } for
>> pid=55276 comm="sendmail"
>> path="/proc/sys/net/ipv6/conf/all/disable_ipv6" dev="proc"
ino=25607
>> scontext=system_u:system_r:system_mail_t:s0-s0:c0.c1023
>> tcontext=system_u:object_r:sysctl_net_t:s0 tclass=file
>> type=AVC msg=audit(1542816535.125:26908): avc: denied { read } for
>> pid=55276 comm="sendmail" name="disable_ipv6"
dev="proc" ino=25607
>> scontext=system_u:system_r:system_mail_t:s0-s0:c0.c1023
>> tcontext=system_u:object_r:sysctl_net_t:s0 tclass=file
I think this is caused by a leaking file descriptor to
/proc/sys/net/ipv6/conf/all/disable_ipv6 from whatever cronjob you are
running, which calls sendmail.
Best regards,
Michael