audit: add saddr_fam filter field

Provide a method to filter out sockaddr and bind calls by network address family. Existing SOCKADDR records are listed for any network activity. Implement the AUDIT_SADDR_FAM field selector to be able to classify or limit records to specific network address families, such as AF_INET or AF_INET6. An example of a network record that is unlikely to be useful and flood the logs: type=SOCKADDR msg=audit(07/27/2017 12:18:27.019:845) : saddr={ fam=local path=/var/run/nscd/socket } type=SYSCALL msg=audit(07/27/2017 12:18:27.019:845) : arch=x86_64 syscall=connect success=no exit=ENOENT(No such file or directory) a0=0x3 a1=0x7fff229c4980 a2=0x6e a3=0x6 items=1 ppid=3301 pid=6145 auid=sgrubb uid=sgrubb gid=sgrubb euid=sgrubb suid=sgrubb fsuid=sgrubb egid=sgrubb sgid=sgrubb fsgid=sgrubb tty=pts3 ses=4 comm=bash exe=/usr/bin/bash subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key=network-test Please see the audit-testsuite PR at https://github.com/linux-audit/audit-testsuite/pull/87 Please see the github issue https://github.com/linux-audit/audit-kernel/issues/64 Please see the github issue for the accompanying userspace support https://github.com/linux-audit/audit-userspace/issues/93

RGRichard Guy Briggs committed 7 years ago