linux-kernel - Re: [syzbot] linux-next test error: KASAN: null-ptr-deref Read in fuse_conn

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Date:   Tue, 21 Sep 2021 08:02:12 +0200
From:   Miklos Szeredi <miklos@...redi.hu>
To:     Dmitry Vyukov <dvyukov@...gle.com>
Cc:     Marco Elver <elver@...gle.com>,
        syzbot <syzbot+b304e8cb713be5f9d4e1@...kaller.appspotmail.com>,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        Linux-Next Mailing List <linux-next@...r.kernel.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>
Subject: Re: [syzbot] linux-next test error: KASAN: null-ptr-deref Read in fuse_conn_put

On Fri, 17 Sept 2021 at 10:05, Dmitry Vyukov <dvyukov@...gle.com> wrote:
>
> On Mon, 6 Sept 2021 at 19:35, Miklos Szeredi <miklos@...redi.hu> wrote:
> > > On Mon, 6 Sept 2021 at 13:56, Miklos Szeredi <miklos@...redi.hu> wrote:
> > > > Thanks,
> > > >
> > > > Force pushed fixed commit 660585b56e63 ("fuse: wait for writepages in
> > > > syncfs") to fuse.git#for-next.
> > > >
> > > > This is fixed as far as I'm concerned, not sure how to tell that to syzbot.
> > >
> > > Thanks -- we can let syzbot know:
> > >
> > > #syz fix: fuse: wait for writepages in syncfs
> > >
> > > (The syntax is just "#syz fix: <commit title>".)
> >
> > Yeah, but that patch has several versions, one of which is broken.
> > Syzbot can't tell the difference just based on the title.
>
> Hi Miklos,
>
> For such cases it's useful to include Tested-by: tag into the commit
> version that fixes the bug:
> http://bit.do/syzbot#amend

Okay, will do that next time.

Thanks,
Miklos