[PATCH v3 1/2] integrity: Add errno field in audit message

[Mimi Zohar]

On Thu, 2020-06-18 at 14:10 -0700, Lakshmi Ramasubramanian wrote:
> Error code is not included in the audit messages logged by
> the integrity subsystem.
> 
> Define a new function integrity_audit_message() that takes error code
> in the "errno" parameter. Add "errno" field in the audit messages logged
> by the integrity subsystem and set the value passed in the "errno"
> parameter.
> 
> [    6.303048] audit: type=1804 audit(1592506281.627:2): pid=1 uid=0 auid=4294967295 ses=4294967295 subj=kernel op=measuring_key cause=ENOMEM comm="swapper/0" name=".builtin_trusted_keys" res=0 errno=-12
> 
> [    7.987647] audit: type=1802 audit(1592506283.312:9): pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 op=policy_update cause=completed comm="systemd" res=1 errno=0
> 
> [    8.019432] audit: type=1804 audit(1592506283.344:10): pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 op=measuring_kexec_cmdline cause=hashing_error comm="systemd" name="kexec-cmdline" res=0 errno=-22
> 
> Signed-off-by: Lakshmi Ramasubramanian <nramas at linux.microsoft.com>
> Suggested-by: Steve Grubb <sgrubb at redhat.com>
> Suggested-by: Mimi Zohar <zohar at linux.ibm.com>

Thanks, Lakshmi.  Steve, Paul, because of the code changes, your tags
were dropped.

Mimi