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 X-Spam-Level: X-Spam-Status: No, score=-8.7 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B4721C47082 for ; Mon, 31 May 2021 07:13:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 94A58611CA for ; Mon, 31 May 2021 07:13:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230070AbhEaHPO (ORCPT ); Mon, 31 May 2021 03:15:14 -0400 Received: from mail-io1-f69.google.com ([209.85.166.69]:34507 "EHLO mail-io1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230150AbhEaHPC (ORCPT ); Mon, 31 May 2021 03:15:02 -0400 Received: by mail-io1-f69.google.com with SMTP id i13-20020a5d9e4d0000b0290497b9f55318so967181ioi.1 for ; Mon, 31 May 2021 00:13:22 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=atZnnwuSSB/aNkrcLst1qeZwbrR7f9UeO1phz8QNpwE=; b=VbAuNquCkBJTdAvsgbM2hp3jOpmN3j9v8ufOL3GIOqbGEPzCnqylZsPiMCNzi2mEmS K5zwdWY1vizMwvpuRugBPMf/xOFzntL4E0yxgbURyucxoiaHhAlSYrosxkCcktQiIzuW lhKLhS7gVX0Bfenb4ETqLx7SHSJ5Kvq+80eRM/lXiy+VqjodNYwZt4pinrkVr8oEjEkx BRCFKz8hlBWywhEiUa8J2vKdl3uL38TbN/bz3n5tPUYFCQsWhj9lRCJIHlqjqAp9dO2F 3mqhUOC6JRCQ6dKE4fYrmZ+z5JhcAVim2Msjq36dzqXGcjGdJDS6pFdYhAcim11ldTY6 7BsA== X-Gm-Message-State: AOAM532CIx4YLfOhIhZOUcMJsubqOZzBvTm071TvFAPrz03rnbTJSVyi lga6EWlsk099b6GXin+oA9AQbEy3ItBqfAB9MG1NAhU6GQ+E X-Google-Smtp-Source: ABdhPJwNLgs/nZ7rcu3+6n3VkwPfpmac5r8gjOCJKck2wK9dal6zMltI8wLooodq4Bb3nN3UXD0J0/3gFtVzwbiUz+toCqkrJYzW MIME-Version: 1.0 X-Received: by 2002:a6b:3b4c:: with SMTP id i73mr15943275ioa.149.1622445202582; Mon, 31 May 2021 00:13:22 -0700 (PDT) Date: Mon, 31 May 2021 00:13:22 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000f7b23005c39af5c1@google.com> Subject: [syzbot] BUG: unable to handle kernel paging request in drm_fb_helper_damage_work (2) From: syzbot To: bp@alien8.de, hpa@zytor.com, linux-kernel@vger.kernel.org, mingo@redhat.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, x86@kernel.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 7ac3a1c1 Merge tag 'mtd/fixes-for-5.13-rc4' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1619b4b5d00000 kernel config: https://syzkaller.appspot.com/x/.config?x=266cda122a0b56c dashboard link: https://syzkaller.appspot.com/bug?extid=545dc60af42828d1e70b userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+545dc60af42828d1e70b@syzkaller.appspotmail.com BUG: unable to handle page fault for address: ffffc9000dc68008 #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page PGD 11000067 P4D 11000067 PUD 111b3067 PMD 1ba2c067 PTE 0 Oops: 0002 [#1] PREEMPT SMP KASAN CPU: 2 PID: 16890 Comm: kworker/2:36 Not tainted 5.13.0-rc3-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 Workqueue: events drm_fb_helper_damage_work RIP: 0010:rep_movs arch/x86/lib/iomem.c:12 [inline] RIP: 0010:memcpy_toio+0x83/0xe0 arch/x86/lib/iomem.c:57 Code: 8c fd 49 89 dd 31 ff 41 83 e5 02 4c 89 ee e8 c4 c2 8c fd 4d 85 ed 75 2e e8 9a ba 8c fd 48 89 e9 48 89 df 4c 89 e6 48 c1 e9 02 a5 40 f6 c5 02 74 02 66 a5 40 f6 c5 01 74 01 a4 5b 5d 41 5c 41 RSP: 0018:ffffc9000e73fbc8 EFLAGS: 00010202 RAX: 0000000000000000 RBX: ffffc9000dc68008 RCX: 00000000000000fe RDX: ffff888015340000 RSI: ffffc9000bdd9008 RDI: ffffc9000dc68008 RBP: 00000000000003f8 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff83e81e1c R11: 0000000000000000 R12: ffffc9000bdd9008 R13: 0000000000000000 R14: ffffc9000bdd9008 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff88802cc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc9000dc68008 CR3: 000000006c062000 CR4: 0000000000152ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: dma_buf_map_memcpy_to include/linux/dma-buf-map.h:245 [inline] drm_fb_helper_damage_blit_real drivers/gpu/drm/drm_fb_helper.c:388 [inline] drm_fb_helper_damage_blit drivers/gpu/drm/drm_fb_helper.c:419 [inline] drm_fb_helper_damage_work+0x733/0xac0 drivers/gpu/drm/drm_fb_helper.c:450 process_one_work+0x98d/0x1600 kernel/workqueue.c:2276 worker_thread+0x64c/0x1120 kernel/workqueue.c:2422 kthread+0x3b1/0x4a0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Modules linked in: CR2: ffffc9000dc68008 ---[ end trace 7f8625a9b15be223 ]--- RIP: 0010:rep_movs arch/x86/lib/iomem.c:12 [inline] RIP: 0010:memcpy_toio+0x83/0xe0 arch/x86/lib/iomem.c:57 Code: 8c fd 49 89 dd 31 ff 41 83 e5 02 4c 89 ee e8 c4 c2 8c fd 4d 85 ed 75 2e e8 9a ba 8c fd 48 89 e9 48 89 df 4c 89 e6 48 c1 e9 02 a5 40 f6 c5 02 74 02 66 a5 40 f6 c5 01 74 01 a4 5b 5d 41 5c 41 RSP: 0018:ffffc9000e73fbc8 EFLAGS: 00010202 RAX: 0000000000000000 RBX: ffffc9000dc68008 RCX: 00000000000000fe RDX: ffff888015340000 RSI: ffffc9000bdd9008 RDI: ffffc9000dc68008 RBP: 00000000000003f8 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff83e81e1c R11: 0000000000000000 R12: ffffc9000bdd9008 R13: 0000000000000000 R14: ffffc9000bdd9008 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff88802cc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc9000dc68008 CR3: 000000006c062000 CR4: 0000000000152ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.