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Re: Bug#751417: linux-image-3.2.0-4-5kc-malta: no SIGKILL after prctl(PR

To: Ben Hutchings <ben@decadent.org.uk>
Subject: Re: Bug#751417: linux-image-3.2.0-4-5kc-malta: no SIGKILL after prctl(PR_SET_SECCOMP, 1, ...) on MIPS
From: Greg KH <greg@kroah.com>
Date: Thu, 12 Jun 2014 14:05:31 -0700
Cc: stable <stable@vger.kernel.org>, linux-mips@linux-mips.org, Ralf Baechle <ralf@linux-mips.org>, 751417@bugs.debian.org, team@security.debian.org, Plamen Alexandrov <plamen@aomeda.com>, Markos Chandras <markos.chandras@imgtec.com>
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References: <20140612161903.32229.20589.reportbug@debian-mips.""> <1402601767.31756.38.camel@deadeye.wl.decadent.org.uk> <1402604501.31756.50.camel@deadeye.wl.decadent.org.uk> <20140612210323.GA30046@kroah.com>
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On Thu, Jun 12, 2014 at 02:03:23PM -0700, Greg KH wrote:
> On Thu, Jun 12, 2014 at 09:21:41PM +0100, Ben Hutchings wrote:
> > On Thu, 2014-06-12 at 20:36 +0100, Ben Hutchings wrote:
> > > Control: tag -1 security upstream patch moreinfo
> > > Control: severity -1 grave
> > > Control: found -1 3.14.5-1
> > 
> > Aurelien Jarno pointed out this appears to be fixed upstream in 3.15:
> > 
> > commit 137f7df8cead00688524c82360930845396b8a21
> > Author: Markos Chandras <markos.chandras@imgtec.com>
> > Date:   Wed Jan 22 14:40:00 2014 +0000
> > 
> >     MIPS: asm: thread_info: Add _TIF_SECCOMP flag
> > 
> > It looks like this can be cherry-picked cleanly onto stable branches for
> > 3.13 and 3.14.  For 3.11 and 3.12, it will need trivial adjustment.
> > 
> > For branches older than 3.11, this needs to be cherry-picked first:
> > 
> > commit e7f3b48af7be9f8007a224663a5b91340626fed5
> > Author: Ralf Baechle <ralf@linux-mips.org>
> > Date:   Wed May 29 01:02:18 2013 +0200
> > 
> >     MIPS: Cleanup flags in syscall flags handlers.
> 
> It also needs parts of 1d7bf993e0731b4ac790667c196b2a2d787f95c3 (MIPS:
> ftrace: Add support for syscall tracepoints.) to apply properly to stuff
> older than 3.11.  But, I'm not so sure that is good to apply as that is
> a whole new feature.
> 
> So I think I'll just do this "by hand" to get it to work properly...

Wait, no, SECCOMP for MIPS isn't even in 3.10 or older kernels, so why
is this a 3.2 issue?  Did you add it there to your kernel for some
reason?

thanks,

greg k-h

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