linux-kernel - [PATCH] audit: add arch field to seccomp event log

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Message-Id: <4bc8c03bda84e004c331546e228b334811b03254.1392409147.git.rgb@redhat.com>
Date:	Fri, 14 Feb 2014 15:23:09 -0500
From:	Richard Guy Briggs <rgb@...hat.com>
To:	linux-audit@...hat.com, linux-kernel@...r.kernel.org
Cc:	Richard Guy Briggs <rgb@...hat.com>,
	Eric Paris <eparis@...hat.com>, Steve Grubb <sgrubb@...hat.com>
Subject: [PATCH] audit: add arch field to seccomp event log

The AUDIT_SECCOMP record looks something like this:

type=SECCOMP msg=audit(1373478171.953:32775): auid=4325 uid=4325 gid=4325 ses=1 subj=unconfined_u:unconfined_r:unconfined_t:s0 pid=12381 comm="test" sig=31 syscall=231 compat=0 ip=0x39ea8bca89 code=0x0

In order to determine what syscall 231 maps to, we need to have the arch= field right before it.

To see the event, compile this test.c program:

=====
int main(void)
{
        return seccomp_load(seccomp_init(SCMP_ACT_KILL));
}
=====

gcc -g test.c -o test -lseccomp

After running the program, find the record by:  ausearch --start recent -m SECCOMP -i
---
 kernel/auditsc.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 6874c1f..c464d44 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -2412,6 +2412,7 @@ void __audit_seccomp(unsigned long syscall, long signr, int code)
 		return;
 	audit_log_task(ab);
 	audit_log_format(ab, " sig=%ld", signr);
+	audit_log_format(ab, " arch=%x", current->audit_context->arch);
 	audit_log_format(ab, " syscall=%ld", syscall);
 	audit_log_format(ab, " compat=%d", is_compat_task());
 	audit_log_format(ab, " ip=0x%lx", KSTK_EIP(current));
-- 
1.7.1

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