Re: [PATCH v4 10/12] ptrace: Don't change __state
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- To: Oleg Nesterov <oleg@xxxxxxxxxx>
- Subject: Re: [PATCH v4 10/12] ptrace: Don't change __state
- From: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
- Date: Fri, 06 May 2022 14:42:16 -0500
- 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
- In-reply-to: <20220506150903.GB16084@redhat.com> (Oleg Nesterov's message of "Fri, 6 May 2022 17:09:04 +0200")
- References: <87a6bv6dl6.fsf_-_@email.froward.int.ebiederm.org> <20220505182645.497868-10-ebiederm@xmission.com> <20220506150903.GB16084@redhat.com>
- User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.1 (gnu/linux)
Oleg Nesterov <oleg@xxxxxxxxxx> writes:
> On 05/05, Eric W. Biederman wrote:
>>
>> --- a/include/linux/sched.h
>> +++ b/include/linux/sched.h
>> @@ -103,7 +103,7 @@ struct task_group;
>> /* Convenience macros for the sake of set_current_state: */
>> #define TASK_KILLABLE (TASK_WAKEKILL | TASK_UNINTERRUPTIBLE)
>> #define TASK_STOPPED (TASK_WAKEKILL | __TASK_STOPPED)
>> -#define TASK_TRACED (TASK_WAKEKILL | __TASK_TRACED)
>> +#define TASK_TRACED __TASK_TRACED
>
> however I personally still dislike this change. But let me read the
> code with this series applied, perhaps I will change my mind. If not,
> I will argue ;)
That is fair. I kind of grew on my after I implemented it and wrapped
my head around what was going on, as it is simple and there are no
implicit cases.
Eric
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