From mboxrd@z Thu Jan 1 00:00:00 1970 From: syzbot Date: Tue, 12 May 2020 06:55:16 +0000 Subject: BUG: unable to handle kernel paging request in bitfill_aligned Message-Id: <00000000000029b38c05a56df2b0@google.com> List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable To: b.zolnierkie@samsung.com, dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Hello, syzbot found the following crash on: HEAD commit: 1d3962ae Merge tag 'io_uring-5.7-2020-05-08' of git://git... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14874258100000 kernel config: https://syzkaller.appspot.com/x/.config?x=B0212dbee046bc1f dashboard link: https://syzkaller.appspot.com/bug?extid=00ed1cf405874e141432 compiler: gcc (GCC) 9.0.0 20181231 (experimental) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+00ed1cf405874e141432@syzkaller.appspotmail.com BUG: unable to handle page fault for address: ffff888000cf5080 #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page PGD d401067 P4D d401067 PUD d402067 PMD cf4063 PTE 0 Oops: 0002 [#1] PREEMPT SMP KASAN CPU: 0 PID: 30473 Comm: syz-executor.4 Not tainted 5.7.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Goo= gle 01/01/2011 RIP: 0010:__writeq arch/x86/include/asm/io.h:98 [inline] RIP: 0010:bitfill_aligned drivers/video/fbdev/core/cfbfillrect.c:64 [inline] RIP: 0010:bitfill_aligned+0xfc/0x200 drivers/video/fbdev/core/cfbfillrect.c= :35 Code: fd 44 89 e0 31 d2 bf 07 00 00 00 f7 f5 41 89 c4 89 c6 89 c5 e8 c5 ab = b3 fd 41 83 fc 07 76 62 45 89 e7 4c 89 ed e8 44 aa b3 fd <48> 89 5d 00 48 8= 9 5d 08 48 89 5d 10 48 89 5d 18 48 89 5d 20 48 89 RSP: 0018:ffffc90001c474e0 EFLAGS: 00010246 RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc90012324000 RDX: 0000000000040000 RSI: ffffffff83bf846c RDI: 0000000000000005 RBP: ffff888000cf5080 R08: ffff888056a6a340 R09: 0000000000000040 R10: ffff888218d3331f R11: ffffed10431a6663 R12: 0000000000000030 R13: ffff888000cf5080 R14: 0000000000000000 R15: 0000000000000030 FS: 00007fe0d9986700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff888000cf5080 CR3: 000000008ea77000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: cfb_fillrect+0x418/0x7a0 drivers/video/fbdev/core/cfbfillrect.c:327 vga16fb_fillrect+0x68f/0x1960 drivers/video/fbdev/vga16fb.c:951 bit_clear_margins+0x2d5/0x4a0 drivers/video/fbdev/core/bitblit.c:232 fbcon_clear_margins+0x1de/0x240 drivers/video/fbdev/core/fbcon.c:1381 fbcon_switch+0xcde/0x16f0 drivers/video/fbdev/core/fbcon.c:2363 redraw_screen+0x2ae/0x770 drivers/tty/vt/vt.c:1015 fbcon_modechanged+0x581/0x720 drivers/video/fbdev/core/fbcon.c:3000 fbcon_update_vcs+0x3a/0x50 drivers/video/fbdev/core/fbcon.c:3047 fb_set_var+0xad0/0xd40 drivers/video/fbdev/core/fbmem.c:1056 do_fb_ioctl+0x390/0x6e0 drivers/video/fbdev/core/fbmem.c:1109 fb_ioctl+0xdd/0x130 drivers/video/fbdev/core/fbmem.c:1185 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl+0x11a/0x180 fs/ioctl.c:771 __do_sys_ioctl fs/ioctl.c:780 [inline] __se_sys_ioctl fs/ioctl.c:778 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:778 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45c829 Code: 0d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 = 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff f= f 0f 83 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fe0d9985c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e4860 RCX: 000000000045c829 RDX: 0000000020000000 RSI: 0000000000004601 RDI: 0000000000000003 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000002f2 R14: 00000000004c54c8 R15: 00007fe0d99866d4 Modules linked in: CR2: ffff888000cf5080 =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D --- This bug 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 bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. 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=-5.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 BBE68C54E4B for ; Tue, 12 May 2020 07:10:37 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 94A3520733 for ; Tue, 12 May 2020 07:10:37 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 94A3520733 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0C2506E85C; Tue, 12 May 2020 07:09:35 +0000 (UTC) Received: from mail-il1-f199.google.com (mail-il1-f199.google.com [209.85.166.199]) by gabe.freedesktop.org (Postfix) with ESMTPS id 37F156E02E for ; Tue, 12 May 2020 06:55:17 +0000 (UTC) Received: by mail-il1-f199.google.com with SMTP id w16so6008872ilm.2 for ; Mon, 11 May 2020 23:55:17 -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=0utPJhl8u3dQnuupDpTMqPJeqZpeiR+EaJx9ihO75P0=; b=RKySpBbtRM7lmMQ/aAEEQTtcANoeNpM8W/a6/vhT5iSEShYBo1FWeeimCEGxx53RFI Wzk4vLMPO6GOMFw2/ORGY0u1ZGjzKL0sJRbt7KYbRNm2GvJFmRvknEq0Lr5jxStzcgS+ SwmYFu0sxyJ7De2GCxXoFnDdusuvxT+f/VF607x+Kdcs6fcoyqI7S5qjEl5BKt5jJOh9 QGBHLj9xePVWQpvcNI0LdMjjluTvcWvfN/vnm7/WFO6kA5GQsOR5ggQUoTUCrPP7xEUI gz3OtdQvwQPOT0XZdY5SS7ZhTC/orMTY74mr5E3YmE4oh/vA3aI8Z+MaauNBXU8Yfr1F kCFA== X-Gm-Message-State: AGi0PuYuB6LLS3yplTnb9jsp8xCG3SRPU6DD8qhcGSGTmjqTjqoScg0J TIVyXd5QAi8tV+HGO5UJgbbF8lLjid4wRJaIPFBZB/qUVFKQ X-Google-Smtp-Source: APiQypKwCw/HVeBYlAIDKGK08rZj9zUSvpqZc6seXE0qHdOTdwDsdt0UCVGhbx/CgOyu5OpFdCQa9NkmKlPwkNqeQrBa6WUcwCoT MIME-Version: 1.0 X-Received: by 2002:a05:6e02:dc3:: with SMTP id l3mr19189526ilj.149.1589266516388; Mon, 11 May 2020 23:55:16 -0700 (PDT) Date: Mon, 11 May 2020 23:55:16 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000029b38c05a56df2b0@google.com> Subject: BUG: unable to handle kernel paging request in bitfill_aligned From: syzbot To: b.zolnierkie@samsung.com, dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com X-Mailman-Approved-At: Tue, 12 May 2020 07:09:30 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Hello, syzbot found the following crash on: HEAD commit: 1d3962ae Merge tag 'io_uring-5.7-2020-05-08' of git://git... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14874258100000 kernel config: https://syzkaller.appspot.com/x/.config?x=b0212dbee046bc1f dashboard link: https://syzkaller.appspot.com/bug?extid=00ed1cf405874e141432 compiler: gcc (GCC) 9.0.0 20181231 (experimental) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+00ed1cf405874e141432@syzkaller.appspotmail.com BUG: unable to handle page fault for address: ffff888000cf5080 #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page PGD d401067 P4D d401067 PUD d402067 PMD cf4063 PTE 0 Oops: 0002 [#1] PREEMPT SMP KASAN CPU: 0 PID: 30473 Comm: syz-executor.4 Not tainted 5.7.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__writeq arch/x86/include/asm/io.h:98 [inline] RIP: 0010:bitfill_aligned drivers/video/fbdev/core/cfbfillrect.c:64 [inline] RIP: 0010:bitfill_aligned+0xfc/0x200 drivers/video/fbdev/core/cfbfillrect.c:35 Code: fd 44 89 e0 31 d2 bf 07 00 00 00 f7 f5 41 89 c4 89 c6 89 c5 e8 c5 ab b3 fd 41 83 fc 07 76 62 45 89 e7 4c 89 ed e8 44 aa b3 fd <48> 89 5d 00 48 89 5d 08 48 89 5d 10 48 89 5d 18 48 89 5d 20 48 89 RSP: 0018:ffffc90001c474e0 EFLAGS: 00010246 RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc90012324000 RDX: 0000000000040000 RSI: ffffffff83bf846c RDI: 0000000000000005 RBP: ffff888000cf5080 R08: ffff888056a6a340 R09: 0000000000000040 R10: ffff888218d3331f R11: ffffed10431a6663 R12: 0000000000000030 R13: ffff888000cf5080 R14: 0000000000000000 R15: 0000000000000030 FS: 00007fe0d9986700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff888000cf5080 CR3: 000000008ea77000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: cfb_fillrect+0x418/0x7a0 drivers/video/fbdev/core/cfbfillrect.c:327 vga16fb_fillrect+0x68f/0x1960 drivers/video/fbdev/vga16fb.c:951 bit_clear_margins+0x2d5/0x4a0 drivers/video/fbdev/core/bitblit.c:232 fbcon_clear_margins+0x1de/0x240 drivers/video/fbdev/core/fbcon.c:1381 fbcon_switch+0xcde/0x16f0 drivers/video/fbdev/core/fbcon.c:2363 redraw_screen+0x2ae/0x770 drivers/tty/vt/vt.c:1015 fbcon_modechanged+0x581/0x720 drivers/video/fbdev/core/fbcon.c:3000 fbcon_update_vcs+0x3a/0x50 drivers/video/fbdev/core/fbcon.c:3047 fb_set_var+0xad0/0xd40 drivers/video/fbdev/core/fbmem.c:1056 do_fb_ioctl+0x390/0x6e0 drivers/video/fbdev/core/fbmem.c:1109 fb_ioctl+0xdd/0x130 drivers/video/fbdev/core/fbmem.c:1185 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl+0x11a/0x180 fs/ioctl.c:771 __do_sys_ioctl fs/ioctl.c:780 [inline] __se_sys_ioctl fs/ioctl.c:778 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:778 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45c829 Code: 0d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fe0d9985c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e4860 RCX: 000000000045c829 RDX: 0000000020000000 RSI: 0000000000004601 RDI: 0000000000000003 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000002f2 R14: 00000000004c54c8 R15: 00007fe0d99866d4 Modules linked in: CR2: ffff888000cf5080 ====================================================== --- This bug 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 bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel 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=-5.4 required=3.0 tests=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 270E4C54E4B for ; Tue, 12 May 2020 06:55:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0D0E720752 for ; Tue, 12 May 2020 06:55:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728965AbgELGzW (ORCPT ); Tue, 12 May 2020 02:55:22 -0400 Received: from mail-io1-f71.google.com ([209.85.166.71]:37300 "EHLO mail-io1-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728836AbgELGzR (ORCPT ); Tue, 12 May 2020 02:55:17 -0400 Received: by mail-io1-f71.google.com with SMTP id 141so3615209iou.4 for ; Mon, 11 May 2020 23:55:16 -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=0utPJhl8u3dQnuupDpTMqPJeqZpeiR+EaJx9ihO75P0=; b=iKxbALIxkrWI8bhaNY1066l0nul32Qh14Xrq+V7IxkgPrrLPkpr2MzQP8kFt+KibnR OwkGZKL7UEbKiwlyCfVuO6sUGTbmTvquDsF+EamVojVwRgM38N3oMtENW7koSXx7ss0L hOCBAwCNq3JRF6c/iposPgfdgi0x2Vrzl5vpVJ3EYbI1U6nqJvrpU4ueTywLR6Wj3ncr JWH5+ExJPh0+zY4+EFYgxpDUFonPMa3VB05C1mt4RyVcMfn/YdfQlSAXPVYttIWnv/Xl ZoIkSdeykLatMbVZAZomiQ3MiT4IH6LLnCnJdHFDVs6caTmveex+pe/C6Ij39vuCqLmc PMrw== X-Gm-Message-State: AGi0PuZfMbqTN0UaLoeMlFJ5IzHUzaZYrxWqp1qEB/0fxv58iynKC3IU O0pIucHZG7TwzS/EFe/l2ittGO/QcRcehsdap1jDD/ziqc0I X-Google-Smtp-Source: APiQypKwCw/HVeBYlAIDKGK08rZj9zUSvpqZc6seXE0qHdOTdwDsdt0UCVGhbx/CgOyu5OpFdCQa9NkmKlPwkNqeQrBa6WUcwCoT MIME-Version: 1.0 X-Received: by 2002:a05:6e02:dc3:: with SMTP id l3mr19189526ilj.149.1589266516388; Mon, 11 May 2020 23:55:16 -0700 (PDT) Date: Mon, 11 May 2020 23:55:16 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000029b38c05a56df2b0@google.com> Subject: BUG: unable to handle kernel paging request in bitfill_aligned From: syzbot To: b.zolnierkie@samsung.com, dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 1d3962ae Merge tag 'io_uring-5.7-2020-05-08' of git://git... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14874258100000 kernel config: https://syzkaller.appspot.com/x/.config?x=b0212dbee046bc1f dashboard link: https://syzkaller.appspot.com/bug?extid=00ed1cf405874e141432 compiler: gcc (GCC) 9.0.0 20181231 (experimental) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+00ed1cf405874e141432@syzkaller.appspotmail.com BUG: unable to handle page fault for address: ffff888000cf5080 #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page PGD d401067 P4D d401067 PUD d402067 PMD cf4063 PTE 0 Oops: 0002 [#1] PREEMPT SMP KASAN CPU: 0 PID: 30473 Comm: syz-executor.4 Not tainted 5.7.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__writeq arch/x86/include/asm/io.h:98 [inline] RIP: 0010:bitfill_aligned drivers/video/fbdev/core/cfbfillrect.c:64 [inline] RIP: 0010:bitfill_aligned+0xfc/0x200 drivers/video/fbdev/core/cfbfillrect.c:35 Code: fd 44 89 e0 31 d2 bf 07 00 00 00 f7 f5 41 89 c4 89 c6 89 c5 e8 c5 ab b3 fd 41 83 fc 07 76 62 45 89 e7 4c 89 ed e8 44 aa b3 fd <48> 89 5d 00 48 89 5d 08 48 89 5d 10 48 89 5d 18 48 89 5d 20 48 89 RSP: 0018:ffffc90001c474e0 EFLAGS: 00010246 RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc90012324000 RDX: 0000000000040000 RSI: ffffffff83bf846c RDI: 0000000000000005 RBP: ffff888000cf5080 R08: ffff888056a6a340 R09: 0000000000000040 R10: ffff888218d3331f R11: ffffed10431a6663 R12: 0000000000000030 R13: ffff888000cf5080 R14: 0000000000000000 R15: 0000000000000030 FS: 00007fe0d9986700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff888000cf5080 CR3: 000000008ea77000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: cfb_fillrect+0x418/0x7a0 drivers/video/fbdev/core/cfbfillrect.c:327 vga16fb_fillrect+0x68f/0x1960 drivers/video/fbdev/vga16fb.c:951 bit_clear_margins+0x2d5/0x4a0 drivers/video/fbdev/core/bitblit.c:232 fbcon_clear_margins+0x1de/0x240 drivers/video/fbdev/core/fbcon.c:1381 fbcon_switch+0xcde/0x16f0 drivers/video/fbdev/core/fbcon.c:2363 redraw_screen+0x2ae/0x770 drivers/tty/vt/vt.c:1015 fbcon_modechanged+0x581/0x720 drivers/video/fbdev/core/fbcon.c:3000 fbcon_update_vcs+0x3a/0x50 drivers/video/fbdev/core/fbcon.c:3047 fb_set_var+0xad0/0xd40 drivers/video/fbdev/core/fbmem.c:1056 do_fb_ioctl+0x390/0x6e0 drivers/video/fbdev/core/fbmem.c:1109 fb_ioctl+0xdd/0x130 drivers/video/fbdev/core/fbmem.c:1185 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl+0x11a/0x180 fs/ioctl.c:771 __do_sys_ioctl fs/ioctl.c:780 [inline] __se_sys_ioctl fs/ioctl.c:778 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:778 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45c829 Code: 0d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fe0d9985c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e4860 RCX: 000000000045c829 RDX: 0000000020000000 RSI: 0000000000004601 RDI: 0000000000000003 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000002f2 R14: 00000000004c54c8 R15: 00007fe0d99866d4 Modules linked in: CR2: ffff888000cf5080 ====================================================== --- This bug 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 bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.