linux-kernel - Re: inotify_add_watch() returning ENOSPC in 2.6.24 [watch descriptor leak?]

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:	Wed, 6 Feb 2008 22:04:10 -0500
From:	Amy Griffis <amy.griffis@...com>
To:	Clem Taylor <clem.taylor@...il.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: inotify_add_watch() returning ENOSPC in 2.6.24 [watch
	descriptor leak?]

Clem Taylor wrote:  [Wed Feb 06 2008, 02:40:58PM EST]
> > Good bug report, thanks.  That code was significantly altered in June 2006
> > and perhaps something broke.
> 
> I also tested on a 2.6.20 x86 desktop machine. It took ~8k iterations
> to fail, which matched max_user_watches. Once the program fails, it
> will fail right away if it is re-run.
> 
> > It's a bit hard to find people who work on inotify, I'm afraid.  If you had
> > the time to come up with a script or program which demonstrates the bug,
> > that would be super-helpful?
> 
> Attached is a simple example that shows off the problem. On a system
> with a problem, it will only run for about
> fs.inotify.max_user_watches iterations. If everything is working, it
> should run forever.

I'll take a look at this. Thanks for providing a reproducer.

Amy
--
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/