linux-kernel - [PATCH 0/4] Was: pidns : PR_SET_PDEATHSIG + SIGKILL regression

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20091004021844.GA21006@redhat.com>
Date:	Sun, 4 Oct 2009 04:18:44 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
Cc:	Daniel Lezcano <dlezcano@...ibm.com>,
	Sukadev Bhattiprolu <sukadev@...ibm.com>,
	Linux Containers <containers@...ts.osdl.org>,
	roland@...hat.com, linux-kernel@...r.kernel.org
Subject: [PATCH 0/4] Was: pidns : PR_SET_PDEATHSIG + SIGKILL regression

On 10/03, Sukadev Bhattiprolu wrote:
>
>  static void reparent_thread(struct task_struct *father, struct task_struct *p,
>  				struct list_head *dead)
>  {
> -	if (p->pdeath_signal)
> -		group_send_sig_info(p->pdeath_signal, SEND_SIG_NOINFO, p);
> +	if (p->pdeath_signal) {
> +		struct siginfo info;
> +
> +		info.si_code = SI_USER;
> +		info.si_signo = p->pdeath_signal;
> +		info.si_errno = 0;
> +
> +		rcu_read_lock();
> +		info.si_pid = task_tgid_nr_ns(father, task_active_pid_ns(p));
> +		info.si_uid = __task_cred(father)->uid;
> +		rcu_read_unlock();
> +
> +		group_send_sig_info(p->pdeath_signal, &info, p);
> +	}

I think the patch is correct.

But afaics we should clarify the "from user" semantics and fix
send_signal() instead.

What do you think about this simple series? (the last 2 patches
are pure cosmetic and off-topic).

Oleg.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/