linux-kernel - Re: [BUGFIX PATCH v3 0/4] arm: kprobes: Fix to prohibit probing on unsafe functions

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Date:   Sat, 12 May 2018 10:06:44 +0100
From:   Russell King - ARM Linux <linux@...linux.org.uk>
To:     Masami Hiramatsu <mhiramat@...nel.org>
Cc:     gregkh@...ux-foundation.org, Wang Nan <wangnan0@...wei.com>,
        Will Deacon <will.deacon@....com>,
        Jon Medhurst <tixy@...aro.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        David Long <dave.long@...aro.org>, stable@...r.kernel.org
Subject: Re: [BUGFIX PATCH v3 0/4] arm: kprobes: Fix to prohibit probing on
 unsafe functions

On Sat, May 12, 2018 at 09:42:21AM +0900, Masami Hiramatsu wrote:
> Hi Greg,
> 
> Could you pick this series to stable?

You've added the Cc for stable, so when they get committed to mainline,
they will be automatically picked up without further need to ask.

However, they do _first_ need to end up in mainline before they can go
anywhere near stable trees as per stable tree rules.  For more
information on stable trees and their rules, please see:

  Documentation/process/stable-kernel-rules.rst

> 
> Thank you,
> 
> On Tue, 8 May 2018 12:25:03 +0100
> Russell King - ARM Linux <linux@...linux.org.uk> wrote:
> 
> > On Fri, May 04, 2018 at 01:14:31PM +0900, Masami Hiramatsu wrote:
> > > Hi,
> > > 
> > > This is the 3rd version of bugfix series for kprobes on arm.
> > > This series fixes 4 different issues which I found.
> > > 
> > >  - Fix to use smp_processor_id() after disabling preemption.
> > >  - Prohibit probing on optimized_callback() for avoiding
> > >    recursive probe.
> > >  - Prohibit kprobes on do_undefinstr() by same reason.
> > >  - Prohibit kprobes on get_user() by same reason.
> > > 
> > > >From v2, I included another 2 bugfixes (1/4 and 2/4)
> > > which are not merged yet, and added "Cc: stable@...r.kernel.org",
> > > since there are obvious bugs.
> > 
> > Please submit them to the patch system, thanks.
> > 
> > > 
> > > Thanks,
> > > 
> > > ---
> > > 
> > > Masami Hiramatsu (4):
> > >       arm: kprobes: Fix to use get_kprobe_ctlblk after irq-disabed
> > >       arm: kprobes: Prohibit probing on optimized_callback
> > >       arm: kprobes: Prohibit kprobes on do_undefinstr
> > >       arm: kprobes: Prohibit kprobes on get_user functions
> > > 
> > > 
> > >  arch/arm/include/asm/assembler.h  |   10 ++++++++++
> > >  arch/arm/kernel/traps.c           |    5 ++++-
> > >  arch/arm/lib/getuser.S            |   10 ++++++++++
> > >  arch/arm/probes/kprobes/opt-arm.c |    4 +++-
> > >  4 files changed, 27 insertions(+), 2 deletions(-)
> > > 
> > > --
> > > Masami Hiramatsu (Linaro) <mhiramat@...nel.org>
> > 
> > -- 
> > RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
> > FTTC broadband for 0.8mile line in suburbia: sync at 8.8Mbps down 630kbps up
> > According to speedtest.net: 8.21Mbps down 510kbps up
> 
> 
> -- 
> Masami Hiramatsu <mhiramat@...nel.org>

-- 
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line in suburbia: sync at 8.8Mbps down 630kbps up
According to speedtest.net: 8.21Mbps down 510kbps up