From: Frederic Weisbecker <frederic@kernel.org>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: LKML <linux-kernel@vger.kernel.org>,
Anna-Maria Behnsen <anna-maria@linutronix.de>,
John Stultz <jstultz@google.com>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@kernel.org>, Stephen Boyd <sboyd@kernel.org>,
Eric Biederman <ebiederm@xmission.com>,
Oleg Nesterov <oleg@redhat.com>
Subject: Re: [patch v4 02/27] signal: Prevent user space from setting si_sys_private
Date: Fri, 27 Sep 2024 14:37:26 +0200 [thread overview]
Message-ID: <ZvanBnJrf8e2_d1A@localhost.localdomain> (raw)
In-Reply-To: <20240927084817.014903652@linutronix.de>
Le Fri, Sep 27, 2024 at 10:48:41AM +0200, Thomas Gleixner a écrit :
> From: Thomas Gleixner <tglx@linutronix.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@linutronix.de>
> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Funny that this field is exposed to userspace.
Anyway:
Acked-by: Frederic Weisbecker <frederic@kernel.org>
next prev parent reply other threads:[~2024-09-27 12:37 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-27 8:48 [patch v4 00/27] posix-timers: Cure the SIG_IGN mess Thomas Gleixner
2024-09-27 8:48 ` [patch v4 01/27] signal: Confine POSIX_TIMERS properly Thomas Gleixner
2024-09-27 12:21 ` Frederic Weisbecker
2024-09-27 8:48 ` [patch v4 02/27] signal: Prevent user space from setting si_sys_private Thomas Gleixner
2024-09-27 12:37 ` Frederic Weisbecker [this message]
2024-09-27 13:40 ` Eric W. Biederman
2024-09-27 8:48 ` [patch v4 03/27] signal: Get rid of resched_timer logic Thomas Gleixner
2024-09-27 13:08 ` Frederic Weisbecker
2024-09-27 13:53 ` Eric W. Biederman
2024-09-27 8:48 ` [patch v4 04/27] posix-timers: Cure si_sys_private race Thomas Gleixner
2024-09-27 14:02 ` Eric W. Biederman
2024-09-27 8:48 ` [patch v4 05/27] signal: Allow POSIX timer signals to be dropped Thomas Gleixner
2024-09-27 8:48 ` [patch v4 06/27] posix-timers: Drop signal if timer has been deleted or reprogrammed Thomas Gleixner
2024-09-27 8:48 ` [patch v4 07/27] posix-timers: Rename k_itimer::it_requeue_pending Thomas Gleixner
2024-09-27 8:48 ` [patch v4 08/27] posix-timers: Add proper state tracking Thomas Gleixner
2024-09-27 8:48 ` [patch v4 09/27] posix-timers: Make signal delivery consistent Thomas Gleixner
2024-09-27 8:48 ` [patch v4 10/27] posix-timers: Make signal overrun accounting sensible Thomas Gleixner
2024-09-27 8:48 ` [patch v4 11/27] posix-cpu-timers: Use dedicated flag for CPU timer nanosleep Thomas Gleixner
2024-09-27 8:48 ` [patch v4 12/27] posix-timers: Add a refcount to struct k_itimer Thomas Gleixner
2024-09-27 8:48 ` [patch v4 13/27] signal: Split up __sigqueue_alloc() Thomas Gleixner
2024-09-27 8:48 ` [patch v4 14/27] signal: Provide posixtimer_sigqueue_init() Thomas Gleixner
2024-09-27 8:48 ` [patch v4 15/27] signal: Add sys_private_ptr to siginfo::_sifields:: _timer Thomas Gleixner
2024-09-27 8:48 ` [patch v4 16/27] posix-timers: Store PID type in the timer Thomas Gleixner
2024-09-27 8:48 ` [patch v4 17/27] signal: Refactor send_sigqueue() Thomas Gleixner
2024-09-27 8:49 ` [patch v4 18/27] posix-timers: Embed sigqueue in struct k_itimer Thomas Gleixner
2024-09-27 8:49 ` [patch v4 19/27] signal: Cleanup unused posix-timer leftovers Thomas Gleixner
2024-09-27 8:49 ` [patch v4 20/27] signal: Add task argument to flush_sigqueue_mask() Thomas Gleixner
2024-09-27 8:49 ` [patch v4 21/27] signal: Provide ignored_posix_timers list Thomas Gleixner
2024-09-27 8:49 ` [patch v4 22/27] posix-timers: Handle ignored list on delete and exit Thomas Gleixner
2024-09-27 8:49 ` [patch v4 23/27] signal: Handle ignored signals in do_sigaction(action != SIG_IGN) Thomas Gleixner
2024-09-27 8:49 ` [patch v4 24/27] signal: Queue ignored posixtimers on ignore list Thomas Gleixner
2024-09-27 8:49 ` [patch v4 25/27] posix-timers: Cleanup SIG_IGN workaround leftovers Thomas Gleixner
2024-09-27 8:49 ` [patch v4 26/27] alarmtimers: Remove the throttle mechanism from alarm_forward_now() Thomas Gleixner
2024-09-27 8:49 ` [patch v4 27/27] alarmtimers: Remove return value from alarm functions Thomas Gleixner
2024-09-27 14:39 ` [patch v4 00/27] posix-timers: Cure the SIG_IGN mess Eric W. Biederman
2024-09-27 19:24 ` Thomas Gleixner
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