On Wed, Feb 14, 2018 at 6:33 PM, Richard Guy Briggs <r...@redhat.com> wrote:
> On 2018-02-14 09:51, Kees Cook wrote:
>> On Wed, Feb 14, 2018 at 8:18 AM, Richard Guy Briggs <r...@redhat.com> wrote:
>> > Audit link denied events emit disjointed records when audit is disabled.
>> > No records should be emitted when audit is disabled.
>> > See: https://github.com/linux-audit/audit-kernel/issues/21
>> > Signed-off-by: Richard Guy Briggs <r...@redhat.com>
>> > ---
>> > kernel/audit.c | 3 +++
>> > 1 file changed, 3 insertions(+)
>> > diff --git a/kernel/audit.c b/kernel/audit.c
>> > index 227db99..4c3fd24 100644
>> > --- a/kernel/audit.c
>> > +++ b/kernel/audit.c
>> > @@ -2261,6 +2261,9 @@ void audit_log_link_denied(const char *operation,
>> > const struct path *link)
>> > struct audit_buffer *ab;
>> > struct audit_names *name;
>> > + if (!audit_enabled || audit_dummy_context())
>> > + return;
>> > +
>> > name = kzalloc(sizeof(*name), GFP_NOFS);
>> > if (!name)
>> > return;
>> Doesn't this means errors here would be silent if audit isn't enabled?
>> I don't that; sysadmins should see this notification regardless of the
>> audit state...
> This is a user error and not a system error, so I would think if system
> auditing is disabled, they don't care about this kind of error.
It could indicate an attack attempt...
> - RGB
> Richard Guy Briggs <r...@redhat.com>
> Sr. S/W Engineer, Kernel Security, Base Operating Systems
> Remote, Ottawa, Red Hat Canada
> IRC: rgb, SunRaycer
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