Re: [PATCH 06/16] ptrace: Remove unnecessary locking in ptrace_(get|set)siginfo
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- To: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
- Subject: Re: [PATCH 06/16] ptrace: Remove unnecessary locking in ptrace_(get|set)siginfo
- From: Oleg Nesterov <oleg@xxxxxxxxxx>
- Date: Tue, 24 May 2022 15:25:01 +0200
- Cc: linux-kernel@xxxxxxxxxxxxxxx, rjw@xxxxxxxxxxxxx, mingo@xxxxxxxxxx, vincent.guittot@xxxxxxxxxx, dietmar.eggemann@xxxxxxx, rostedt@xxxxxxxxxxx, mgorman@xxxxxxx, bigeasy@xxxxxxxxxxxxx, Will Deacon <will@xxxxxxxxxx>, tj@xxxxxxxxxx, linux-pm@xxxxxxxxxxxxxxx, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Richard Weinberger <richard@xxxxxx>, Anton Ivanov <anton.ivanov@xxxxxxxxxxxxxxxxxx>, Johannes Berg <johannes@xxxxxxxxxxxxxxxx>, linux-um@xxxxxxxxxxxxxxxxxxx, Chris Zankel <chris@xxxxxxxxxx>, Max Filippov <jcmvbkbc@xxxxxxxxx>, linux-xtensa@xxxxxxxxxxxxxxxx, Kees Cook <keescook@xxxxxxxxxxxx>, Jann Horn <jannh@xxxxxxxxxx>, linux-ia64@xxxxxxxxxxxxxxx, Robert OCallahan <roc@xxxxxxxxx>, Kyle Huey <khuey@xxxxxxxxx>, Richard Henderson <rth@xxxxxxxxxxxxxxx>, Ivan Kokshaysky <ink@xxxxxxxxxxxxxxxxxxxx>, Matt Turner <mattst88@xxxxxxxxx>, Jason Wessel <jason.wessel@xxxxxxxxxxxxx>, Daniel Thompson <daniel.thompson@xxxxxxxxxx>, Douglas Anderson <dianders@xxxxxxxxxxxx>, Douglas Miller <dougmill@xxxxxxxxxxxxxxxxxx>, Michael Ellerman <mpe@xxxxxxxxxxxxxx>, Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>, Paul Mackerras <paulus@xxxxxxxxx>
- In-reply-to: <20220518225355.784371-6-ebiederm@xmission.com>
- References: <871qwq5ucx.fsf_-_@email.froward.int.ebiederm.org> <20220518225355.784371-6-ebiederm@xmission.com>
- User-agent: Mutt/1.5.24 (2015-08-30)
On 05/18, Eric W. Biederman wrote:
>
> Since commit 9899d11f6544 ("ptrace: ensure arch_ptrace/ptrace_request
> can never race with SIGKILL") it has been unnecessary for
> ptrace_getsiginfo and ptrace_setsiginfo to use lock_task_sighand.
ACK
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