linux-kernel - Re: btrfs io errors on 3.4rc1

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Message-ID: <20120403171632.GA25334@redhat.com>
Date:	Tue, 3 Apr 2012 13:16:33 -0400
From:	Dave Jones <davej@...hat.com>
To:	David Sterba <dsterba@...e.cz>,
	Chris Mason <chris.mason@...cle.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	linux-btrfs@...r.kernel.org, jeffm@...e.com
Subject: Re: btrfs io errors on 3.4rc1

On Tue, Apr 03, 2012 at 01:07:50PM -0400, Dave Jones wrote:

 >  > wait, what...
 >  > 
 >  >  535         memset(trans, 0, sizeof(*trans));
 >  >  536         kmem_cache_free(btrfs_trans_handle_cachep, trans);
 >  >  537 
 >  >  538         if (throttle)
 >  >  539                 btrfs_run_delayed_iputs(root);
 >  >  540 
 >  >  541         if (trans->aborted ||
 >  >  542             root->fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) {
 >  >  543                 return -EIO;
 >  >  544         }
 >  > 
 >  > that looks like a pretty clear use-after-free.
 > 
 > Ok, trying this..

Yep that fixes it.  Chris I'll mail it to you again with a proper sign-off.

thanks for the help chasing this down David.

	Dave
 
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