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Date:   Tue, 14 Apr 2020 21:55:04 -0700
In-Reply-To: <20200415043553.GH90651@mit.edu>
Message-ID: <00000000000098a5d505a34d1e48@google.com>
Subject: Re: BUG: unable to handle kernel NULL pointer dereference in
 generic_perform_write (2)
From:   syzbot <syzbot+bca9799bf129256190da@syzkaller.appspotmail.com>
To:     adilger.kernel@dilger.ca, akpm@linux-foundation.org,
        dan.j.williams@intel.com, jack@suse.cz, linux-ext4@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-mm@kvack.org,
        syzkaller-bugs@googlegroups.com, tytso@mit.edu
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Sender: linux-ext4-owner@vger.kernel.org
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Hello,

syzbot has tested the proposed patch and the reproducer did not trigger crash:

Reported-and-tested-by: syzbot+bca9799bf129256190da@syzkaller.appspotmail.com

Tested on:

commit:         5b8b9d0c Merge branch 'akpm' (patches from Andrew)
git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel config:  https://syzkaller.appspot.com/x/.config?x=23c5a352e32a1944
dashboard link: https://syzkaller.appspot.com/bug?extid=bca9799bf129256190da
compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
patch:          https://syzkaller.appspot.com/x/patch.diff?x=15524a00100000

Note: testing is done by a robot and is best-effort only.