[PATCH ghak64 V3] audit: add saddr_fam filter field

[Paul Moore]

On Thu, May 9, 2019 at 8:02 PM Richard Guy Briggs <rgb at redhat.com> wrote:
>
> 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
>
> Signed-off-by: Richard Guy Briggs <rgb at redhat.com>
> ---
> Changelog:
> v2:
> - rebase on ghak73 v2
> - check for valid range of saddr_fam value
> v3:
> - eliminate AF_UNSPEC check
>
>  include/uapi/linux/audit.h | 1 +
>  kernel/auditfilter.c       | 5 +++++
>  kernel/auditsc.c           | 5 +++++
>  3 files changed, 11 insertions(+)

Merged into audit/next.

-- 
paul moore
www.paul-moore.com