linux-kernel - [PATCH 0/5] uprobes/x86: cleanup validate_insn_* paths, fix X86

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Message-ID: <20140419170104.GA30667@redhat.com>
Date:	Sat, 19 Apr 2014 19:01:04 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>
Cc:	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Anton Arapov <aarapov@...hat.com>,
	David Long <dave.long@...aro.org>,
	Denys Vlasenko <dvlasenk@...hat.com>,
	"Frank Ch. Eigler" <fche@...hat.com>,
	Jim Keniston <jkenisto@...ibm.com>,
	Jonathan Lebon <jlebon@...hat.com>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 0/5] uprobes/x86: cleanup validate_insn_* paths, fix
	X86_X32 case

Peter, feel free to ignore 1-4, but could you look at 5/5? It lacks the
test-case because I do not have a x32-ready testing machine.

On 04/17, Oleg Nesterov wrote:
>
> This series only fixes the problem. I'll send more changes to address
> some of TODO's mentioned in the changelogs later. In particular, we
> need to do something with "callw", see "Note: in 13/15.

So, what do you all think we should do with "callw"? Jim votes for
declining to probe callw, and I fully agree.

Any objection?

Until then, lets cleanup the validate_insn_* paths and fix another bug.
This cleanup can also simplify the next "reject callw" change.

Oleg.

 arch/x86/kernel/process_64.c |    7 +-
 arch/x86/kernel/uprobes.c    |  126 ++++++++++++++++++------------------------
 2 files changed, 58 insertions(+), 75 deletions(-)

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