From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-io1-f72.google.com ([209.85.166.72]:44147 "EHLO mail-io1-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727537AbeK0R56 (ORCPT ); Tue, 27 Nov 2018 12:57:58 -0500 Received: by mail-io1-f72.google.com with SMTP id v8so20497719ioh.11 for ; Mon, 26 Nov 2018 23:01:05 -0800 (PST) MIME-Version: 1.0 Date: Mon, 26 Nov 2018 23:01:04 -0800 Message-ID: <0000000000005b7c64057ba003fb@google.com> Subject: BUG: unable to handle kernel paging request in tpg_fill_plane_buffer From: syzbot To: bwinther@cisco.com, hverkuil@xs4all.nl, keescook@chromium.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-media-owner@vger.kernel.org List-ID: Hello, syzbot found the following crash on: HEAD commit: 6f8b52ba442c Merge tag 'hwmon-for-v4.20-rc5' of git://git... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15fd354d400000 kernel config: https://syzkaller.appspot.com/x/.config?x=c94f9f0c0363db4b dashboard link: https://syzkaller.appspot.com/bug?extid=aa8212f63ea8ffaf3bfa compiler: gcc (GCC) 8.0.1 20180413 (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+aa8212f63ea8ffaf3bfa@syzkaller.appspotmail.com BUG: unable to handle kernel paging request at ffffc90005b5c340 PGD 1da95a067 P4D 1da95a067 PUD 1da95b067 PMD 1c4863067 PTE 0 Oops: 0002 [#1] PREEMPT SMP KASAN CPU: 0 PID: 5439 Comm: vivid-000-vid-c Not tainted 4.20.0-rc4+ #130 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:memcpy_erms+0x6/0x10 arch/x86/lib/memcpy_64.S:54 Code: 90 90 90 90 eb 1e 0f 1f 00 48 89 f8 48 89 d1 48 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 c3 66 0f 1f 44 00 00 48 89 f8 48 89 d1 a4 c3 0f 1f 80 00 00 00 00 48 89 f8 48 83 fa 20 72 7e 40 38 fe RSP: 0018:ffff888150467518 EFLAGS: 00010246 RAX: ffffc90005b5c340 RBX: 0000000000000080 RCX: 0000000000000080 RDX: 0000000000000080 RSI: ffffc90001da3000 RDI: ffffc90005b5c340 RBP: ffff888150467538 R08: fffff52000b6b878 R09: fffff52000b6b868 R10: fffff52000b6b877 R11: ffffc90005b5c3bf R12: ffffc90005b5c340 R13: ffffc90001da3000 R14: dffffc0000000000 R15: ffff8881cb2c5e50 FS: 0000000000000000(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc90005b5c340 CR3: 00000001846a4000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: memcpy include/linux/string.h:352 [inline] tpg_fill_plane_pattern drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2382 [inline] tpg_fill_plane_buffer+0x193f/0x44c0 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2481 vivid_fillbuff+0x1d0d/0x68e0 drivers/media/platform/vivid/vivid-kthread-cap.c:473 vivid_thread_vid_cap_tick drivers/media/platform/vivid/vivid-kthread-cap.c:709 [inline] vivid_thread_vid_cap+0xbc1/0x2650 drivers/media/platform/vivid/vivid-kthread-cap.c:813 kthread+0x35a/0x440 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Modules linked in: CR2: ffffc90005b5c340 ---[ end trace 22cabf1d47b26daf ]--- RIP: 0010:memcpy_erms+0x6/0x10 arch/x86/lib/memcpy_64.S:54 Code: 90 90 90 90 eb 1e 0f 1f 00 48 89 f8 48 89 d1 48 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 c3 66 0f 1f 44 00 00 48 89 f8 48 89 d1 a4 c3 0f 1f 80 00 00 00 00 48 89 f8 48 83 fa 20 72 7e 40 38 fe RSP: 0018:ffff888150467518 EFLAGS: 00010246 RAX: ffffc90005b5c340 RBX: 0000000000000080 RCX: 0000000000000080 RDX: 0000000000000080 RSI: ffffc90001da3000 RDI: ffffc90005b5c340 RBP: ffff888150467538 R08: fffff52000b6b878 R09: fffff52000b6b868 R10: fffff52000b6b877 R11: ffffc90005b5c3bf R12: ffffc90005b5c340 R13: ffffc90001da3000 R14: dffffc0000000000 R15: ffff8881cb2c5e50 FS: 0000000000000000(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc90005b5c340 CR3: 00000001846a4000 CR4: 00000000001406f0 kobject: 'loop0' (00000000664d120c): kobject_uevent_env DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 kobject: 'loop0' (00000000664d120c): fill_kobj_path: path = '/devices/virtual/block/loop0' DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- 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#bug-status-tracking for how to communicate with syzbot.