netdev - Re: [PATCH v11 08/12] signal, x86: add SIGSYS info and make it synchronous.

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]

Date:	Mon, 27 Feb 2012 09:34:19 -0800
From:	Roland McGrath <mcgrathr@...gle.com>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	Will Drewry <wad@...omium.org>, linux-kernel@...r.kernel.org,
	linux-arch@...r.kernel.org, linux-doc@...r.kernel.org,
	kernel-hardening@...ts.openwall.com, netdev@...r.kernel.org,
	x86@...nel.org, arnd@...db.de, davem@...emloft.net, hpa@...or.com,
	mingo@...hat.com, peterz@...radead.org, rdunlap@...otime.net,
	tglx@...utronix.de, luto@....edu, eparis@...hat.com,
	serge.hallyn@...onical.com, djm@...drot.org, scarybeasts@...il.com,
	indan@....nu, pmoore@...hat.com, akpm@...ux-foundation.org,
	corbet@....net, eric.dumazet@...il.com, markus@...omium.org,
	coreyb@...ux.vnet.ibm.com, keescook@...omium.org
Subject: Re: [PATCH v11 08/12] signal, x86: add SIGSYS info and make it synchronous.

On Mon, Feb 27, 2012 at 9:22 AM, Oleg Nesterov <oleg@...hat.com> wrote:
> SYNCHRONOUS_MASK just tells dequeue_signal() "pick them first".
> This is needed to make sure that the handler for, say SIGSEGV,
> can use ucontext->ip as a faulting addr.

It's desireable to have these signals handled first just so that the thread
state that provoked the signal is not obscured by an unrelated asynchronous
signal having its handler setup done beforehand.
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html