linux-kernel - Re: [rtc-linux] Re: BUG: lock held when returning to user space

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, 29 Oct 2007 13:20:20 +0100
From:	Alessandro Zummo <alessandro.zummo@...ertech.it>
To:	rtc-linux@...glegroups.com
Cc:	jikos@...os.cz, Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Gabriel C <nix.or.die@...glemail.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [rtc-linux] Re: BUG: lock held when returning to user space

On Sun, 28 Oct 2007 00:47:15 +0200 (CEST)
Jiri Kosina <jikos@...os.cz> wrote:

> Yes, but the fact is that is really is invalid use of mutex -- because the 
> mutex owner could become seriously wrong after fork() or sending the 
> filedescriptor through unix socket ... this easily leads to broken 
> situation.
> 
> This seems to have been introduced in e824290e5d ... Alessandro, could you 
> convert this to test_and_set_bit()/clear_bit() semantics instead of a 
> mutex please?

 Hi Jiri,
   I was away for the weekend and just saw the whole discussion
 and your patch and I'm happy to ack it. Thank you very much
 a thanks to Gabriel for the bug report!
 

-- 

 Best regards,

 Alessandro Zummo,
  Tower Technologies - Torino, Italy

  http://www.towertech.it

-
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/