From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2BDEBC433FE for ; Sun, 19 Dec 2021 15:57:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236081AbhLSP5J (ORCPT ); Sun, 19 Dec 2021 10:57:09 -0500 Received: from mail-il1-f198.google.com ([209.85.166.198]:35567 "EHLO mail-il1-f198.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233204AbhLSP5I (ORCPT ); Sun, 19 Dec 2021 10:57:08 -0500 Received: by mail-il1-f198.google.com with SMTP id b3-20020a92c563000000b002aea8d2dfa7so3866758ilj.2 for ; Sun, 19 Dec 2021 07:57:08 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:date:in-reply-to:message-id:subject :from:to; bh=J1Z0E8FYOyeGYmMCih47JGz9INwvVqcSBEE3r+oJjRA=; b=Sj0kOicynoQXgF//kR//B2TBcOgsquhpSLbWEpY2z4dem6qwlAEnZczlRGFlr/WVKg HCNWKvgIfFr2YUsjg6gNknu0H6VgSfI3Ol77JTgzL3gwCE5greHdHsvEZYp5TqXW1Zdl 4s39OjTTKgkaJANBlOipnXk+1vsVEpMe3C/wR+cGItpUCwXd22Wk922e+tIcdC/GeX9h /2Pk8zyh/q6mzuGEI+yBg0ajoRBIjYaJDTz/2IdFwo8TxmsF/jbOkkFlVOpretMmKth3 NdVhwvnm/GJ5nTUMSBnfV3T6OQM7Z6QFBcFH8oP9X6OpKvdO2bsbFhX0ODJpqmhu/IBW vmHQ== X-Gm-Message-State: AOAM531LShf3arxBfCdYjT7RuBl9BroXfwpUqtRz9JeHQePD/25zf8En 8K2k1VB1VkvhfOGRMF6eY+prtn5JeoqTPUzPyabNWSFX+T8o X-Google-Smtp-Source: ABdhPJzibjb8GU6GjM7AflOG1x8TLswRn7G6hxR5g2tBuxN6SrcEX/7NjUMQhAmD4CNcXRBnPUoAQBEM5E0iq4KRPSEZAzxtSFzJ MIME-Version: 1.0 X-Received: by 2002:a6b:2cc1:: with SMTP id s184mr6122309ios.63.1639929427727; Sun, 19 Dec 2021 07:57:07 -0800 (PST) Date: Sun, 19 Dec 2021 07:57:07 -0800 In-Reply-To: <000000000000685c4605d0e47dad@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000ff1c4105d381d24f@google.com> Subject: Re: [syzbot] KASAN: use-after-free Read in drm_gem_object_release_handle From: syzbot To: airlied@linux.ie, christian.koenig@amd.com, daniel.vetter@ffwll.ch, daniel.vetter@intel.com, daniel@ffwll.ch, dri-devel@lists.freedesktop.org, linaro-mm-sig-owner@lists.linaro.org, linaro-mm-sig@lists.linaro.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, maarten.lankhorst@linux.intel.com, mripard@kernel.org, sumit.semwal@linaro.org, syzkaller-bugs@googlegroups.com, tzimmermann@suse.de Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org syzbot has bisected this issue to: commit 45d9c8dde4cd8589f9180309ec60f0da2ce486e4 Author: Daniel Vetter Date: Thu Aug 12 13:14:12 2021 +0000 drm/vgem: use shmem helpers bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=147953cbb00000 start commit: 3f667b5d4053 Merge tag 'tty-5.16-rc6' of git://git.kernel... git tree: upstream final oops: https://syzkaller.appspot.com/x/report.txt?x=167953cbb00000 console output: https://syzkaller.appspot.com/x/log.txt?x=127953cbb00000 kernel config: https://syzkaller.appspot.com/x/.config?x=fa556098924b78f0 dashboard link: https://syzkaller.appspot.com/bug?extid=c8ae65286134dd1b800d syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16fd41ebb00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1483c7d5b00000 Reported-by: syzbot+c8ae65286134dd1b800d@syzkaller.appspotmail.com Fixes: 45d9c8dde4cd ("drm/vgem: use shmem helpers") For information about bisection process see: https://goo.gl/tpsmEJ#bisection