From: Christoph Hellwig <hch@lst.de>
To: Peilin Ye <yepeilin.cs@gmail.com>
Cc: Jens Axboe <axboe@kernel.dk>, Hillf Danton <hdanton@sina.com>,
Christoph Hellwig <hch@lst.de>,
Johannes Thumshirn <johannes.thumshirn@wdc.com>,
Jan Kara <jack@suse.cz>, Ming Lei <ming.lei@redhat.com>,
Konstantin Khlebnikov <koct9i@gmail.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-block@vger.kernel.org,
linux-kernel-mentees@lists.linuxfoundation.org,
syzkaller-bugs@googlegroups.com, linux-kernel@vger.kernel.org
Subject: Re: [Linux-kernel-mentees] [PATCH] block: Fix use-after-free in bdev_del_partition()
Date: Thu, 3 Sep 2020 08:59:50 +0200 [thread overview]
Message-ID: <20200903065950.GA19012@lst.de> (raw)
In-Reply-To: <20200903065534.623691-1-yepeilin.cs@gmail.com>
On Thu, Sep 03, 2020 at 02:55:34AM -0400, Peilin Ye wrote:
> In bdev_del_partition(), `part` is being looked up outside the critical
> section. This is causing bdev_del_partition() to delete the same partition
> more than once. Fix it by reverting commit cddae808aeb7.
We've already fix the problem properly:
https://git.kernel.dk/cgit/linux-block/commit/?h=block-5.9&id=08fc1ab6d748ab1a690fd483f41e2938984ce353
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@lst.de>
To: Peilin Ye <yepeilin.cs@gmail.com>
Cc: Jens Axboe <axboe@kernel.dk>, Hillf Danton <hdanton@sina.com>,
Jan Kara <jack@suse.cz>,
Johannes Thumshirn <johannes.thumshirn@wdc.com>,
syzkaller-bugs@googlegroups.com, linux-kernel@vger.kernel.org,
Ming Lei <ming.lei@redhat.com>,
linux-block@vger.kernel.org,
linux-kernel-mentees@lists.linuxfoundation.org,
Christoph Hellwig <hch@lst.de>,
Konstantin Khlebnikov <koct9i@gmail.com>
Subject: Re: [Linux-kernel-mentees] [PATCH] block: Fix use-after-free in bdev_del_partition()
Date: Thu, 3 Sep 2020 08:59:50 +0200 [thread overview]
Message-ID: <20200903065950.GA19012@lst.de> (raw)
In-Reply-To: <20200903065534.623691-1-yepeilin.cs@gmail.com>
On Thu, Sep 03, 2020 at 02:55:34AM -0400, Peilin Ye wrote:
> In bdev_del_partition(), `part` is being looked up outside the critical
> section. This is causing bdev_del_partition() to delete the same partition
> more than once. Fix it by reverting commit cddae808aeb7.
We've already fix the problem properly:
https://git.kernel.dk/cgit/linux-block/commit/?h=block-5.9&id=08fc1ab6d748ab1a690fd483f41e2938984ce353
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Linux-kernel-mentees mailing list
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next prev parent reply other threads:[~2020-09-03 6:59 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-31 16:58 KASAN: use-after-free Read in bdev_del_partition syzbot
2020-08-31 20:29 ` syzbot
2020-09-02 9:31 ` Peilin Ye
2020-09-03 6:55 ` [Linux-kernel-mentees] [PATCH] block: Fix use-after-free in bdev_del_partition() Peilin Ye
2020-09-03 6:55 ` Peilin Ye
2020-09-03 6:59 ` Christoph Hellwig [this message]
2020-09-03 6:59 ` Christoph Hellwig
2020-09-03 7:23 ` Peilin Ye
2020-09-03 7:23 ` Peilin Ye
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