linux-ext4 - Re: [PATCH] ext4: Fix missing iput for root inode in case of all failed mount paths.

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Message-ID: <20110228014548.GO2924@thunk.org>
Date:	Sun, 27 Feb 2011 20:45:48 -0500
From:	Ted Ts'o <tytso@....edu>
To:	Manish Katiyar <mkatiyar@...il.com>
Cc:	Andreas Dilger <adilger@...ger.ca>,
	ext4 <linux-ext4@...r.kernel.org>
Subject: Re: [PATCH] ext4: Fix missing iput for root inode in case of all
 failed mount paths.

On Sat, Feb 26, 2011 at 01:35:05PM -0800, Manish Katiyar wrote:
> 
> Is there anything else that I need to do to get this merged in your tree ?
> 

I've added the patch with the following explanation:

ext4: fix missing iput of root inode for some mount error paths

This assures that the root inode is not leaked, and that sb->s_root is
NULL, which will prevent generic_shutdown_super() from doing extra
work, including call sync_filesystem, which ultimately results in
ext4_sync_fs() getting called with an uninitialized struct super,
which is the cause of the crash noted in Kernel Bugzilla #26752.

https://bugzilla.kernel.org/show_bug.cgi?id=26752

Signed-off-by: Manish Katiyar <mkatiyar@...il.com>
Signed-off-by: "Theodore Ts'o" <tytso@....edu>

Sorry for the delay, but this patch was held up pending my tracingg
through the code and understanding why this really fixed BZ #26752.
In the future, adding a bit more detail in the commit log will help me
process the patch faster, since I won't have to reproduce your
analysis.

Also, just quoting a BZ number without going into more detail risks my
putting it the patch on my "to analyze --- when I have access to
network" queue if I happen to come across it while on an airplane.  :-)

					- Ted
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