linux-kernel - Re: [patch v4 02/27] signal: Prevent user space from setting si_sys

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Message-ID: <ZvanBnJrf8e2_d1A@localhost.localdomain>
Date: Fri, 27 Sep 2024 14:37:26 +0200
From: Frederic Weisbecker <frederic@...nel.org>
To: Thomas Gleixner <tglx@...utronix.de>
Cc: LKML <linux-kernel@...r.kernel.org>,
	Anna-Maria Behnsen <anna-maria@...utronix.de>,
	John Stultz <jstultz@...gle.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>, Stephen Boyd <sboyd@...nel.org>,
	Eric Biederman <ebiederm@...ssion.com>,
	Oleg Nesterov <oleg@...hat.com>
Subject: Re: [patch v4 02/27] signal: Prevent user space from setting
 si_sys_private


Le Fri, Sep 27, 2024 at 10:48:41AM +0200, Thomas Gleixner a écrit :
> From: Thomas Gleixner <tglx@...utronix.de>
> 
> The si_sys_private member of siginfo is used to handle posix-timer rearming
> from the signal delivery path. Prevent user space from setting it as that
> creates inconsistent state.
> 
> Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
> Acked-by: Peter Zijlstra (Intel) <peterz@...radead.org>

Funny that this field is exposed to userspace.

Anyway:

Acked-by: Frederic Weisbecker <frederic@...nel.org>