linux-kernel - Re: [PATCH] timerfd/eventfd context lock doesn't protect against poll

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: <Pine.LNX.4.64.0705172258400.5705@alien.or.mcafeemobile.com>
Date:	Thu, 17 May 2007 23:20:05 -0700 (PDT)
From:	Davide Libenzi <davidel@...ilserver.org>
To:	Davi Arnaut <davi@...ent.com.br>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] timerfd/eventfd context lock doesn't protect against
 poll_wait

On Fri, 18 May 2007, Davi Arnaut wrote:

> Hi,
> 
> poll_wait() callback may modify the waitqueue without holding the
> context private lock.

Thx Davi, patch is correct. Nice catch. But at this point instead of 
ending up getting two locks, we may look into using Andrew suggestion of 
reusing the waitqueue lock. Is it universally considered a "legal" 
operation?


- Davide


-
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/