linux-kernel - Re: siginfo pid not populated from ptrace?

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Message-ID: <20181127232126.GA23658@cisco>
Date:   Tue, 27 Nov 2018 16:21:26 -0700
From:   Tycho Andersen <tycho@...ho.ws>
To:     "Eric W. Biederman" <ebiederm@...ssion.com>
Cc:     Kees Cook <keescook@...omium.org>, Oleg Nesterov <oleg@...hat.com>,
        linux-kernel@...r.kernel.org
Subject: Re: siginfo pid not populated from ptrace?

On Mon, Nov 12, 2018 at 12:24:43PM -0700, Tycho Andersen wrote:
> On Mon, Nov 12, 2018 at 11:55:38AM -0700, Tycho Andersen wrote:
> > I haven't manage to reproduce it on stock v4.20-rc2, unfortunately.
> 
> Ok, now I have,
> 
> seccomp_bpf.c:2736:global.syscall_restart:Expected getpid() (1493) == info._sifields._kill.si_pid (0)
> global.syscall_restart: Test failed at step #22

Seems like this is still happening on v4.20-rc4,

[ RUN      ] global.syscall_restart
seccomp_bpf.c:2736:global.syscall_restart:Expected getpid() (1901) == info._sifields._kill.si_pid (0)
global.syscall_restart: Test failed at step #22

Tycho