From: Yongqiang Yang <xiaoqiangnk@gmail.com>
To: Jan Kara <jack@suse.cz>
Cc: Allison Henderson <achender@linux.vnet.ibm.com>,
Ext4 Developers List <linux-ext4@vger.kernel.org>
Subject: Re: [PATCH 1/1] Null Pointer when make_indexed_dir returns -ENOSPC
Date: Mon, 9 May 2011 19:20:39 +0800 [thread overview]
Message-ID: <BANLkTinT3KXY9RiX_Rv1GAGHi=m6roC37w@mail.gmail.com> (raw)
In-Reply-To: <BANLkTi=hSeN4mb8x9vu4DfBb-us_ocaqXw@mail.gmail.com>
On Mon, May 9, 2011 at 7:18 PM, Yongqiang Yang <xiaoqiangnk@gmail.com> wrote:
> On Mon, May 9, 2011 at 7:03 PM, Jan Kara <jack@suse.cz> wrote:
>> On Sat 07-05-11 16:54:27, Allison Henderson wrote:
>>> Fix for a null pointer bug found while running punch hole tests
>>>
>>> Signed-off-by: Allison Henderson <achender@us.ibm.com>
>>> ---
>>> :100644 100644 3c7a06e... 3302a6c... M fs/ext4/namei.c
>>> fs/ext4/namei.c | 3 ++-
>>> 1 files changed, 2 insertions(+), 1 deletions(-)
>>>
>>> diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
>>> index 3c7a06e..3302a6c 100644
>>> --- a/fs/ext4/namei.c
>>> +++ b/fs/ext4/namei.c
>>> @@ -1422,7 +1422,8 @@ static int make_indexed_dir(handle_t *handle, struct dentry *dentry,
>>> */
>>> ext4_mark_inode_dirty(handle, dir);
>>> ext4_handle_dirty_metadata(handle, dir, frame->bh);
>>> - ext4_handle_dirty_metadata(handle, dir, bh);
>>> + if (bh)
>>> + ext4_handle_dirty_metadata(handle, dir, bh);
>> I'm puzzled - bh here is bh2 from the beginning of the function and we
>> check it for being NULL after we ext4_append() it. So how can this happen?
> do_split() encounters a journal error and set bh to NULL before returning.
Sorry, it does not make sense.
>
>>
>> Honza
>>> dx_release(frames);
>>> return retval;
>>> }
>>> --
>>> 1.7.1
>>>
>> --
>> Jan Kara <jack@suse.cz>
>> SUSE Labs, CR
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at http://vger.kernel.org/majordomo-info.html
>>
>
>
>
> --
> Best Wishes
> Yongqiang Yang
>
--
Best Wishes
Yongqiang Yang
--
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next prev parent reply other threads:[~2011-05-09 11:20 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-07 23:54 [PATCH 1/1] Null Pointer when make_indexed_dir returns -ENOSPC Allison Henderson
2011-05-09 0:38 ` Ted Ts'o
2011-05-09 11:03 ` Jan Kara
2011-05-09 11:18 ` Yongqiang Yang
2011-05-09 11:20 ` Yongqiang Yang [this message]
2011-05-09 11:21 ` Yongqiang Yang
2011-05-09 11:30 ` Jan Kara
2011-05-09 11:33 ` Yongqiang Yang
2011-05-09 11:36 ` Jan Kara
2011-05-09 13:55 ` Ted Ts'o
2011-05-09 14:05 ` Jan Kara
2011-05-09 14:22 ` Ted Ts'o
2011-05-09 14:27 ` [PATCH -v2] ext4: don't dereference null pointer when make_indexed_dir() fails Theodore Ts'o
2011-05-09 14:56 ` Eric Sandeen
2011-05-09 14:42 ` [PATCH 1/1] Null Pointer when make_indexed_dir returns -ENOSPC Jan Kara
2011-05-09 20:39 ` Allison Henderson
2011-05-10 13:34 ` Jan Kara
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