linux-kernel - Re: processes hung after sys_renameat, and 'missing' processes

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 for Android: free password hash cracker in your pocket

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

Date:	Wed, 6 Jun 2012 21:31:12 -0400
From:	Dave Jones <davej@...hat.com>
To:	Al Viro <viro@...IV.linux.org.uk>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Miklos Szeredi <mszeredi@...e.cz>, Jan Kara <jack@...e.cz>,
	Peter Zijlstra <peterz@...radead.org>
Subject: Re: processes hung after sys_renameat, and 'missing' processes

On Thu, Jun 07, 2012 at 02:29:00AM +0100, Al Viro wrote:
 > On Wed, Jun 06, 2012 at 09:19:15PM -0400, Dave Jones wrote:
 > > On Wed, Jun 06, 2012 at 05:42:35PM -0700, Linus Torvalds wrote:
 > > 
 > >  > So Al meant you to test mutex_is_locked(dentry->d_inode->i_mutex) of
 > >  > the parents.
 > > 
 > > ok, I ended up with..
 > > 
 > >         WARN_ON_ONCE(!mutex_is_locked(&target->d_parent->d_inode->i_mutex));
 > > 
 > >         if (dentry->d_parent != NULL)
 > 			       != dentry)
 > 
 > ->d_parent *never* should be NULL; when dentry is disconnected from the
 > tree (or hadn't been connected to it yet), it points to that dentry itself.

ah, thanks. My VFS ignorance showing there.

	Dave
--
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/