From: Christoph Hellwig <hch@infradead.org>
To: Theodore Ts'o <tytso@mit.edu>,
Fengguang Wu <fengguang.wu@intel.com>,
Marti Raudsepp <marti@juffo.org>,
Kernel hackers <linux-kernel@vger.kernel.org>,
ext4 hackers <linux-ext4@vger.kernel.org>,
maze@google.com
Subject: Re: NULL pointer dereference in ext4_ext_remove_space on 3.5.1
Date: Fri, 17 Aug 2012 13:48:41 -0400 [thread overview]
Message-ID: <20120817174841.GA4519@infradead.org> (raw)
In-Reply-To: <20120817131558.GA11439@thunk.org>
On Fri, Aug 17, 2012 at 09:15:58AM -0400, Theodore Ts'o wrote:
> Thanks Fengguang:
>
> For the record, I was able to find my own easy repro, last night using
> only a 220 meg partition:
>
> # mke2fs -t ext4 -b 1024 -J size=1 /dev/vdc
> # mount -t ext2 /dev/vdc /vdc
> # mkdir /vdc/a
> # cd /vdc/a
> # seq 1 210000 | xargs -n 1 fallocate -l 1m
> # seq 1 2 210000 | xargs /bin/rm
> # mkdir /vdc/b
> # cd /vdc/b
> # seq 1 103 | xargs -n 1 fallocate -l 1g
> # cd /
> # umount /vdc
> # mount -t ext4 -o commit=10000 /dev/vdc /vdc
> # rm -rf /vdc/b
Can you submit this for xfstests?
next prev parent reply other threads:[~2012-08-17 17:48 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-15 18:33 NULL pointer dereference in ext4_ext_remove_space on 3.5.1 Marti Raudsepp
2012-08-16 2:46 ` Theodore Ts'o
2012-08-16 11:10 ` Fengguang Wu
2012-08-16 15:25 ` Theodore Ts'o
2012-08-16 20:21 ` Maciej Żenczykowski
2012-08-16 21:19 ` Theodore Ts'o
2012-08-16 21:40 ` Maciej Żenczykowski
2012-08-16 22:26 ` Theodore Ts'o
2012-08-16 22:44 ` Maciej Żenczykowski
2012-08-17 6:01 ` Fengguang Wu
2012-08-17 13:15 ` Theodore Ts'o
2012-08-17 13:22 ` Fengguang Wu
2012-08-17 13:50 ` [PATCH] ext4: fix kernel BUG on large-scale rm -rf commands Theodore Ts'o
2012-08-17 17:48 ` Christoph Hellwig [this message]
2012-08-17 20:34 ` NULL pointer dereference in ext4_ext_remove_space on 3.5.1 Theodore Ts'o
2012-08-17 21:05 ` Christoph Hellwig
2012-08-17 22:55 ` Dave Chinner
2012-08-17 23:11 ` Theodore Ts'o
2012-08-17 6:09 ` ext4 write performance regression in 3.6-rc1 Fengguang Wu
2012-08-17 13:40 ` Theodore Ts'o
2012-08-17 14:13 ` Fengguang Wu
2012-08-17 14:25 ` ext4 write performance regression in 3.6-rc1 on RAID0/5 Fengguang Wu
[not found] ` <20120817151318.GA2341@localhost>
2012-08-17 15:37 ` Theodore Ts'o
2012-08-17 20:44 ` NeilBrown
2012-08-21 9:42 ` Fengguang Wu
2012-08-21 12:07 ` Fengguang Wu
[not found] ` <20120822035702.GF2570@yliu-dev.sh.intel.com>
2012-08-22 4:07 ` Shaohua Li
2012-08-22 6:00 ` NeilBrown
2012-08-22 6:31 ` Yuanhan Liu
2012-08-22 7:14 ` Andreas Dilger
2012-08-22 20:47 ` Dan Williams
2012-08-22 21:59 ` NeilBrown
2012-09-17 12:21 ` NULL pointer dereference in ext4_ext_remove_space on 3.5.1 Dmitry Monakhov
2012-09-17 13:52 ` Theodore Ts'o
2012-09-17 14:48 ` Dmitry Monakhov
2012-08-16 9:00 ` Fengguang Wu
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