linux-kernel - Re: WARNING in idr

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Message-ID: <00000000000019196205a08cc67d@google.com>
Date:   Tue, 10 Mar 2020 21:36:02 -0700
From:   syzbot <syzbot+05835159fe322770fe3d@...kaller.appspotmail.com>
To:     a@...table.cc, airlied@...ux.ie, airlied@...hat.com,
        alexander.deucher@....com, b.a.t.m.a.n@...ts.open-mesh.org,
        christian.koenig@....com, daniel@...ll.ch, davem@...emloft.net,
        dri-devel@...ts.freedesktop.org, gregkh@...uxfoundation.org,
        hdegoede@...hat.com, kraxel@...hat.com,
        linux-kernel@...r.kernel.org, maarten.lankhorst@...ux.intel.com,
        mareklindner@...mailbox.ch, mripard@...nel.org,
        netdev@...r.kernel.org, noralf@...nnes.org, sw@...onwunderlich.de,
        syzkaller-bugs@...glegroups.com, tglx@...utronix.de,
        tzimmermann@...e.de
Subject: Re: WARNING in idr_destroy

syzbot has bisected this bug to:

commit 5b3709793d151e6e12eb6a38a5da3f7fc2923d3a
Author: Thomas Zimmermann <tzimmermann@...e.de>
Date:   Wed May 8 08:26:19 2019 +0000

    drm/ast: Convert AST driver to |struct drm_gem_vram_object|

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=15a66fb5e00000
start commit:   63623fd4 Merge tag 'for-linus' of git://git.kernel.org/pub..
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=17a66fb5e00000
console output: https://syzkaller.appspot.com/x/log.txt?x=13a66fb5e00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=5d2e033af114153f
dashboard link: https://syzkaller.appspot.com/bug?extid=05835159fe322770fe3d
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=14e978e3e00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=10b1a819e00000

Reported-by: syzbot+05835159fe322770fe3d@...kaller.appspotmail.com
Fixes: 5b3709793d15 ("drm/ast: Convert AST driver to |struct drm_gem_vram_object|")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection