linux-kernel - Re: kernel BUG at drivers/android/binder

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Message-ID: <CACT4Y+aH8eApRv8u_DKh8Rr4Rr70GK4Lv1Wxac=18DxXu8GWjw@mail.gmail.com>
Date:   Fri, 17 May 2019 17:33:32 +0200
From:   Dmitry Vyukov <dvyukov@...gle.com>
To:     Todd Kjos <tkjos@...gle.com>
Cc:     syzbot <syzbot+f9f3f388440283da2965@...kaller.appspotmail.com>,
        Arve Hjønnevåg <arve@...roid.com>,
        Christian Brauner <christian@...uner.io>,
        "open list:ANDROID DRIVERS" <devel@...verdev.osuosl.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Joel Fernandes <joel@...lfernandes.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Martijn Coenen <maco@...roid.com>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>,
        Todd Kjos <tkjos@...roid.com>
Subject: Re: kernel BUG at drivers/android/binder_alloc.c:LINE! (3)

On Fri, May 17, 2019 at 5:26 PM Todd Kjos <tkjos@...gle.com> wrote:
>
> Yes (and syzbot seemed to confirm the fix). I didn't realize I needed
> to manually close the issue. I guess you closed it yesterday.

This is required to auto-close the bug when the commit is merged:

> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+f9f3f388440283da2965@...kaller.appspotmail.com

Otherwise somebody needs to say:

#syz fix: binder: fix BUG_ON found by selinux-testsuite


> From: Dmitry Vyukov <dvyukov@...gle.com>
> Date: Fri, May 17, 2019 at 3:08 AM
> To: syzbot
> Cc: Arve Hjønnevåg, Christian Brauner, open list:ANDROID DRIVERS, Greg
> Kroah-Hartman, Joel Fernandes, LKML, Martijn Coenen, syzkaller-bugs,
> Todd Kjos <tkjos@...roid.com>, Todd Kjos <tkjos@...gle.com>
>
> > On Fri, Mar 29, 2019 at 10:55 AM syzbot
> > <syzbot+f9f3f388440283da2965@...kaller.appspotmail.com> wrote:
> > >
> > > Hello,
> > >
> > > syzbot has tested the proposed patch and the reproducer did not trigger
> > > crash:
> > >
> > > Reported-and-tested-by:
> > > syzbot+f9f3f388440283da2965@...kaller.appspotmail.com
> > >
> > > Tested on:
> > >
> > > commit:         8c2ffd91 Linux 5.1-rc2
> > > git tree:
> > > git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git master
> > > kernel config:  https://syzkaller.appspot.com/x/.config?x=8dcdce25ea72bedf
> > > compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
> > > patch:          https://syzkaller.appspot.com/x/patch.diff?x=10fed663200000
> > >
> > > Note: testing is done by a robot and is best-effort only.
> >
> >
> > Todd,
> >
> > Should this patch fix the bug? Should we close the bug as fixed then?
> > In my local testing I see this BUG still fires, but if we will leave
> > old fixed bugs open, we will not get notifications about new crashes.