linux-ext4 - Re: general protection fault in ext4_commit

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Message-ID: <X+I3QEL7gxO/YljX@mit.edu>
Date:   Tue, 22 Dec 2020 13:13:20 -0500
From:   "Theodore Y. Ts'o" <tytso@....edu>
To:     Jan Kara <jack@...e.cz>
Cc:     Hillf Danton <hdanton@...a.com>,
        syzbot <syzbot+9043030c040ce1849a60@...kaller.appspotmail.com>,
        linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org,
        syzkaller-bugs@...glegroups.com
Subject: Re: general protection fault in ext4_commit_super

On Tue, Dec 22, 2020 at 12:28:53PM +0100, Jan Kara wrote:
> > Fix e810c942a325 ("ext4: save error info to sb through journal if available")
> > by flushing work as part of rollback.
> 
> Thanks for having a look. I don't think the fix is quite correct though. The
> flush_work() should be at failed_mount3: label. So something like attached
> fixup. Ted, can you please fold it into the buggy commit?

Done.  I folded it into "ext4: defer saving error info from atomic
context" since this is the commit where we introduced the s_error_work
workqueue.

Thanks!!

						- Ted