linux-kernel - Re: general protection fault in ext4

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Message-ID: <20191119031627.GJ3147@sol.localdomain>
Date:   Mon, 18 Nov 2019 19:16:27 -0800
From:   Eric Biggers <ebiggers@...nel.org>
To:     syzbot <syzbot+9567fda428fba259deba@...kaller.appspotmail.com>
Cc:     adilger.kernel@...ger.ca, jack@...e.cz, linux-ext4@...r.kernel.org,
        linux-kernel@...r.kernel.org, riteshh@...ux.ibm.com,
        syzkaller-bugs@...glegroups.com, tytso@....edu
Subject: Re: general protection fault in ext4_writepages

On Mon, Nov 11, 2019 at 11:25:00AM -0800, syzbot wrote:
> Hello,
> 
> syzbot has tested the proposed patch and the reproducer did not trigger
> crash:
> 
> Reported-and-tested-by:
> syzbot+9567fda428fba259deba@...kaller.appspotmail.com
> 
> Tested on:
> 
> commit:         4d06bfb9 ext4: Add error handling for io_end_vec struct al..
> git tree:
> https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git test
> kernel config:  https://syzkaller.appspot.com/x/.config?x=2cc209e226c8fbbd
> dashboard link: https://syzkaller.appspot.com/bug?extid=9567fda428fba259deba
> compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
> 
> Note: testing is done by a robot and is best-effort only.
> 

Marking this fixed for syzbot.

#syz fix: ext4: Add error handling for io_end_vec struct allocation