linux-kernel - Re: [PATCH v2] panic: Taint kernel if fault injection has been used

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAADnVQKDZfP51WeVOeY-6RNH=MHT2BhtW6F8PaJV5-RoJOtMkQ@mail.gmail.com>
Date:   Tue, 6 Dec 2022 20:45:17 -0800
From:   Alexei Starovoitov <alexei.starovoitov@...il.com>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     Masami Hiramatsu <mhiramat@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>, bpf <bpf@...r.kernel.org>,
        Borislav Petkov <bp@...en8.de>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Kees Cook <keescook@...omium.org>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        KP Singh <kpsingh@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Florent Revest <revest@...omium.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Christoph Hellwig <hch@...radead.org>,
        Chris Mason <clm@...a.com>
Subject: Re: [PATCH v2] panic: Taint kernel if fault injection has been used

On Tue, Dec 6, 2022 at 8:39 PM Steven Rostedt <rostedt@...dmis.org> wrote:
> >
> > [   49.281382] general protection fault, probably for non-canonical address 0x57e006e00000000: 0000 [#1] PREEMPT SMP KASAN
> > [   49.282226] CPU: 6 PID: 1688 Comm: test_progs Tainted: G    B      O       6.1.0-rc7-01508-gf0c5a2d9f234 #4343
> > [   49.283751] RIP: 0010:rethook_trampoline_handler+0xff/0x1d0
> > [   49.289900] Call Trace:
> > [   49.290083]  <TASK>
> > [   49.290248]  arch_rethook_trampoline_callback+0x6c/0xa0
> > [   49.290631]  arch_rethook_trampoline+0x2c/0x50
> > [   49.290964]  ? lock_release+0xad/0x3f0
> > [   49.291245]  ? bpf_prog_test_run_tracing+0x235/0x380
> > [   49.291609]  trace_clock_x86_tsc+0x10/0x10
> >
> > This is just running bpf selftests in parallel mode on 16-cpu VM on bpf-next.
> > Notice 'Tained' flags.
> > Please take a look.
> >
>
> "G - Proprietary module" - "O - out of tree module"
>
> Can you reproduce this without those taints?

Lol. That question is exactly the reason why my Nack stands.