From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-it1-f200.google.com ([209.85.166.200]:42151 "EHLO mail-it1-f200.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725843AbeJaEpz (ORCPT ); Wed, 31 Oct 2018 00:45:55 -0400 Received: by mail-it1-f200.google.com with SMTP id v125-v6so14621514ita.7 for ; Tue, 30 Oct 2018 12:51:03 -0700 (PDT) MIME-Version: 1.0 Date: Tue, 30 Oct 2018 12:51:02 -0700 Message-ID: <00000000000069922505797781b0@google.com> Subject: WARNING in vb2_core_reqbufs From: syzbot To: kyungmin.park@samsung.com, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, m.szyprowski@samsung.com, mchehab@kernel.org, pawel@osciak.com, 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: 11743c56785c Merge tag 'rpmsg-v4.20' of git://github.com/a.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16680f9d400000 kernel config: https://syzkaller.appspot.com/x/.config?x=93932074d01b4a5 dashboard link: https://syzkaller.appspot.com/bug?extid=f9966a25169b6d66d61f 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+f9966a25169b6d66d61f@syzkaller.appspotmail.com WARNING: CPU: 0 PID: 24550 at drivers/media/common/videobuf2/videobuf2-core.c:727 vb2_core_reqbufs+0x5c7/0x1040 drivers/media/common/videobuf2/videobuf2-core.c:727 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 24550 Comm: syz-executor0 Not tainted 4.19.0+ #311 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 kobject: 'loop1' (00000000ed4787c1): kobject_uevent_env panic+0x238/0x4e7 kernel/panic.c:184 __warn.cold.8+0x20/0x4a kernel/panic.c:536 report_bug+0x254/0x2d0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:966 RIP: 0010:vb2_core_reqbufs+0x5c7/0x1040 drivers/media/common/videobuf2/videobuf2-core.c:727 Code: 83 c0 03 38 d0 7c 08 84 d2 0f 85 15 09 00 00 44 8b 3b 31 ff 48 83 c3 04 44 89 fe e8 03 47 34 fc 45 85 ff 75 9e e8 e9 45 34 fc <0f> 0b bb ea ff ff ff e8 dd 45 34 fc 48 b8 00 00 00 00 00 fc ff df RSP: 0018:ffff8801884ff538 EFLAGS: 00010212 RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc9000ba50000 RDX: 00000000000000c3 RSI: ffffffff854b1e17 RDI: 0000000000000005 RBP: ffff8801884ff6d0 R08: ffff8801cb208240 R09: ffff8801cbba62b8 R10: ffffed0039774c5e R11: ffff8801cbba62f7 R12: 0000000000000008 R13: 0000000000000001 R14: ffff8801cbba6258 R15: ffff8801b88c8080 vb2_ioctl_reqbufs+0x1c2/0x350 drivers/media/common/videobuf2/videobuf2-v4l2.c:721 v4l_reqbufs+0xae/0xd0 drivers/media/v4l2-core/v4l2-ioctl.c:1882 __video_do_ioctl+0x519/0xf00 drivers/media/v4l2-core/v4l2-ioctl.c:2833 video_usercopy+0x5c1/0x1760 drivers/media/v4l2-core/v4l2-ioctl.c:3013 video_ioctl2+0x2c/0x33 drivers/media/v4l2-core/v4l2-ioctl.c:3057 v4l2_ioctl+0x154/0x1b0 drivers/media/v4l2-core/v4l2-dev.c:364 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:685 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:702 __do_sys_ioctl fs/ioctl.c:709 [inline] __se_sys_ioctl fs/ioctl.c:707 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:707 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457569 Code: fd b3 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 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f5481b79c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569 RDX: 0000000020000100 RSI: 00000000c0145608 RDI: 0000000000000003 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5481b7a6d4 R13: 00000000004c1cca R14: 00000000004d2bb8 R15: 00000000ffffffff Kernel Offset: disabled Rebooting in 86400 seconds.. --- 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.