From: Paul Moore <paul@paul-moore.com>
To: Nazarov Sergey <s-nazarov@yandex.ru>
Cc: "linux-security-module@vger.kernel.org"
<linux-security-module@vger.kernel.org>,
"selinux@vger.kernel.org" <selinux@vger.kernel.org>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
Casey Schaufler <casey@schaufler-ca.com>
Subject: Re: Kernel memory corruption in CIPSO labeled TCP packets processing.
Date: Tue, 22 Jan 2019 12:48:04 -0500 [thread overview]
Message-ID: <CAHC9VhRhEvcU804qMfZik7qwohuCDfcbvJMHRT+DxMPvvMDEGQ@mail.gmail.com> (raw)
In-Reply-To: <4824091548178512@sas1-ea1d14049a51.qloud-c.yandex.net>
On Tue, Jan 22, 2019 at 12:35 PM Nazarov Sergey <s-nazarov@yandex.ru> wrote:
> 22.01.2019, 19:49, "Paul Moore" <paul@paul-moore.com>:
> >
> > Granted I'm looking at this rather quickly, so I may be missing
> > something, but why the changes to ip_options_compile()? Couldn't you
> > simply set opt->data manually (set the ptr) in cipso_v4_error() before
> > calling ip_options_compile() and arrive at the same result without
> > having to modify ip_options_compile()? I suppose there is the rtable
> > value to worry about, but ip_options_echo() should take care of that,
> > yes? No?
>
> ip_options_compile calls icmp_send, if someting wrong. So, we'll go back
> to trying to fix. ip_options_compile changes needed to avoid this.
Yes, exactly. If you don't pass the skb it shouldn't attempt to call
icmp_send() in case of error.
--
paul moore
www.paul-moore.com
next prev parent reply other threads:[~2019-01-22 17:48 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <16659801547571984@sas1-890ba5c2334a.qloud-c.yandex.net>
2019-01-15 17:55 ` Kernel memory corruption in CIPSO labeled TCP packets processing Casey Schaufler
2019-01-15 19:52 ` Paul Moore
2019-01-18 14:53 ` Paul Moore
2019-01-18 16:34 ` Nazarov Sergey
2019-01-18 17:17 ` Paul Moore
2019-01-21 17:11 ` Nazarov Sergey
2019-01-22 16:49 ` Paul Moore
2019-01-22 17:35 ` Nazarov Sergey
2019-01-22 17:48 ` Paul Moore [this message]
2019-01-24 14:46 ` Nazarov Sergey
2019-01-25 16:45 ` Paul Moore
2019-01-28 13:10 ` Nazarov Sergey
2019-01-28 22:18 ` Paul Moore
2019-01-29 7:23 ` Nazarov Sergey
2019-01-29 22:42 ` Paul Moore
2019-01-30 13:11 ` Nazarov Sergey
2019-01-31 2:10 ` Paul Moore
2019-01-31 13:20 ` Nazarov Sergey
2019-02-11 20:37 ` Paul Moore
2019-02-11 21:21 ` Nazarov Sergey
2019-02-11 23:43 ` Paul Moore
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