lgdt330x 0-0059: Demod loaded for LGDT3303 chip tuner-simple 0-0061: creating new instance tuner-simple 0-0061: type set to 64 (LG TDVS-H06xF) b2c2-flexcop: found 'LG Electronics LGDT3303 VSB/QAM Frontend' . usb 2-1: DVB: registering adapter 0 frontend 0 (LG Electronics LGDT3303 VSB/QAM Frontend)... b2c2-flexcop: initialization of 'Air2PC/AirStar 2 ATSC 3rd generation (HD5000)' at the 'USB' bus controlled by a 'FlexCopIII' complete kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] SMP KASAN CPU: 1 PID: 22 Comm: kworker/1:1 Not tainted 5.4.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: usb_hub_wq hub_event RIP: 0010:flexcop_usb_transfer_init drivers/media/usb/b2c2/flexcop-usb.c:430 [inline] RIP: 0010:flexcop_usb_probe.cold+0x1cb/0x7bd drivers/media/usb/b2c2/flexcop-usb.c:575 Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 74 05 e8 41 df 62 fd 48 8b 5b 18 b8 ff ff 37 00 48 c1 e0 2a 48 8d 7b 04 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 c1 RSP: 0018:ffff8881d932f298 EFLAGS: 00010247 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000d368000 RDX: 0000000000000000 RSI: ffffffff84028c7b RDI: 0000000000000004 RBP: ffff8881cf01b008 R08: ffff8881da24e000 R09: ffffed103b665d58 R10: ffffed103b665d57 R11: ffff8881db32eabf R12: ffff8881cf01b048 R13: 0000000000000000 R14: ffff8881cf01b000 R15: ffff8881af0b0000 FS: 0000000000000000(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff502970000 CR3: 00000001b0006000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: usb_probe_interface+0x305/0x7a0 drivers/usb/core/driver.c:361 really_probe+0x281/0x6d0 drivers/base/dd.c:548 driver_probe_device+0x104/0x210 drivers/base/dd.c:721 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:828 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:430 __device_attach+0x217/0x360 drivers/base/dd.c:894 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:490 device_add+0xae6/0x16f0 drivers/base/core.c:2202 usb_set_configuration+0xdf6/0x1670 drivers/usb/core/message.c:2023 generic_probe+0x9d/0xd5 drivers/usb/core/generic.c:210 usb_probe_device+0x99/0x100 drivers/usb/core/driver.c:266 really_probe+0x281/0x6d0 drivers/base/dd.c:548 driver_probe_device+0x104/0x210 drivers/base/dd.c:721 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:828 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:430 __device_attach+0x217/0x360 drivers/base/dd.c:894 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:490 device_add+0xae6/0x16f0 drivers/base/core.c:2202 usb_new_device.cold+0x6a4/0xe79 drivers/usb/core/hub.c:2537 hub_port_connect drivers/usb/core/hub.c:5184 [inline] hub_port_connect_change drivers/usb/core/hub.c:5324 [inline] port_event drivers/usb/core/hub.c:5470 [inline] hub_event+0x1df8/0x3800 drivers/usb/core/hub.c:5552 process_one_work+0x92b/0x1530 kernel/workqueue.c:2269 process_scheduled_works kernel/workqueue.c:2331 [inline] worker_thread+0x7ab/0xe20 kernel/workqueue.c:2417 kthread+0x318/0x420 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Modules linked in: ---[ end trace 495cadcd5880c41a ]--- RIP: 0010:flexcop_usb_transfer_init drivers/media/usb/b2c2/flexcop-usb.c:430 [inline] RIP: 0010:flexcop_usb_probe.cold+0x1cb/0x7bd drivers/media/usb/b2c2/flexcop-usb.c:575 Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 74 05 e8 41 df 62 fd 48 8b 5b 18 b8 ff ff 37 00 48 c1 e0 2a 48 8d 7b 04 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 c1 RSP: 0018:ffff8881d932f298 EFLAGS: 00010247 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000d368000 RDX: 0000000000000000 RSI: ffffffff84028c7b RDI: 0000000000000004 RBP: ffff8881cf01b008 R08: ffff8881da24e000 R09: ffffed103b665d58 R10: ffffed103b665d57 R11: ffff8881db32eabf R12: ffff8881cf01b048 R13: 0000000000000000 R14: ffff8881cf01b000 R15: ffff8881af0b0000 FS: 0000000000000000(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff502970000 CR3: 0000000006c21000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400