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From: Thomas Gleixner <tglx@kernel.org>
To: Oleg Nesterov <oleg@redhat.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>, Frederic Weisbecker
 <frederic@kernel.org>, Hyunwoo Kim <imv4bel@gmail.com>,
 brauner@kernel.org, peterz@infradead.org, anna-maria@linutronix.de,
 linux-kernel@vger.kernel.org
Subject: Re: [PATCH V2] signal: Prevent exec() race
In-Reply-To: <apf6XyStCiwJ7CSM@redhat.com>
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Date: Thu, 03 Sep 2026 08:09:07 +0200
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On Wed, Sep 02 2026 at 12:28, Oleg Nesterov wrote:
>> @@ -1990,6 +2004,9 @@ void posixtimer_send_sigqueue(struct k_i
>>  	if (!likely(lock_task_sighand(t, &flags)))
>>  		return;
>>
>> +	if (unlikely(tmr->it_pid_type == PIDTYPE_PID && (t->flags & PF_EXITING)))
>> +		return;
>
> this lacks unlock_sighand().

Bah.