usb 3-1: USB disconnect, device number 104 BUG: unable to handle page fault for address: ffffffffffffffff #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 7826067 P4D 7826067 PUD 7828067 PMD 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 5235 Comm: kworker/0:3 Not tainted 5.18.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: usb_hub_wq hub_event RIP: 0010:__media_entity_remove_link+0x119/0xa10 drivers/media/mc/mc-entity.c:587 Code: 89 44 24 20 48 c1 e8 03 48 89 44 24 28 eb 34 e8 8d 30 22 fd 4d 8d 6c 24 20 4c 89 e8 48 c1 e8 03 80 3c 18 00 0f 85 27 06 00 00 <49> 8b 44 24 20 4c 89 e5 48 83 e8 20 4c 39 2c 24 0f 84 b9 02 00 00 RSP: 0018:ffffc90005acf438 EFLAGS: 00010246 RAX: 1fffffffffffffff RBX: dffffc0000000000 RCX: ffffc90016c00000 RDX: 0000000000040000 RSI: ffffffff84224883 RDI: ffff88811ea65d70 RBP: ffff888208fe4980 R08: 0000000000000001 R09: ffffffff8aa3f74f R10: 0000000000000001 R11: 000000000005203f R12: ffffffffffffffdf R13: ffffffffffffffff R14: ffff888108fe4900 R15: ffff88813d1a4300 FS: 0000000000000000(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffff CR3: 00000001347a0000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __media_entity_remove_links+0x86/0x160 drivers/media/mc/mc-entity.c:760 __media_device_unregister_entity+0x187/0x300 drivers/media/mc/mc-device.c:597 media_device_unregister_entity+0x49/0x70 drivers/media/mc/mc-device.c:689 dvb_media_device_free+0x55/0x680 drivers/media/dvb-core/dvbdev.c:205 dvb_remove_device.part.0+0x9c/0x260 drivers/media/dvb-core/dvbdev.c:558 dvb_remove_device drivers/media/dvb-core/dvbdev.c:551 [inline] dvb_unregister_device+0x1b/0x60 drivers/media/dvb-core/dvbdev.c:580 dvb_dmxdev_release+0x1a0/0x630 drivers/media/dvb-core/dmxdev.c:1461 dvb_usb_adapter_dvb_exit+0x93/0x230 drivers/media/usb/dvb-usb/dvb-usb-dvb.c:224 dvb_usb_adapter_exit drivers/media/usb/dvb-usb/dvb-usb-init.c:126 [inline] dvb_usb_exit drivers/media/usb/dvb-usb/dvb-usb-init.c:141 [inline] dvb_usb_device_exit+0x20a/0x510 drivers/media/usb/dvb-usb/dvb-usb-init.c:336 usb_unbind_interface+0x1d8/0x8e0 drivers/usb/core/driver.c:458 device_remove drivers/base/dd.c:531 [inline] device_remove+0x11f/0x170 drivers/base/dd.c:523 __device_release_driver drivers/base/dd.c:1199 [inline] device_release_driver_internal+0x4a3/0x680 drivers/base/dd.c:1222 bus_remove_device+0x2eb/0x5a0 drivers/base/bus.c:529 device_del+0x4f3/0xc80 drivers/base/core.c:3592 usb_disable_device+0x35b/0x7b0 drivers/usb/core/message.c:1419 usb_disconnect.cold+0x278/0x6ec drivers/usb/core/hub.c:2228 hub_port_connect drivers/usb/core/hub.c:5207 [inline] hub_port_connect_change drivers/usb/core/hub.c:5507 [inline] port_event drivers/usb/core/hub.c:5665 [inline] hub_event+0x1e74/0x4680 drivers/usb/core/hub.c:5747 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 process_scheduled_works kernel/workqueue.c:2352 [inline] worker_thread+0x854/0x1080 kernel/workqueue.c:2438 kthread+0x2ef/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Modules linked in: CR2: ffffffffffffffff ---[ end trace 0000000000000000 ]--- RIP: 0010:__media_entity_remove_link+0x119/0xa10 drivers/media/mc/mc-entity.c:587 Code: 89 44 24 20 48 c1 e8 03 48 89 44 24 28 eb 34 e8 8d 30 22 fd 4d 8d 6c 24 20 4c 89 e8 48 c1 e8 03 80 3c 18 00 0f 85 27 06 00 00 <49> 8b 44 24 20 4c 89 e5 48 83 e8 20 4c 39 2c 24 0f 84 b9 02 00 00 RSP: 0018:ffffc90005acf438 EFLAGS: 00010246 RAX: 1fffffffffffffff RBX: dffffc0000000000 RCX: ffffc90016c00000 RDX: 0000000000040000 RSI: ffffffff84224883 RDI: ffff88811ea65d70 RBP: ffff888208fe4980 R08: 0000000000000001 R09: ffffffff8aa3f74f R10: 0000000000000001 R11: 000000000005203f R12: ffffffffffffffdf R13: ffffffffffffffff R14: ffff888108fe4900 R15: ffff88813d1a4300 FS: 0000000000000000(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffff CR3: 00000001347a0000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 89 44 24 20 mov %eax,0x20(%rsp) 4: 48 c1 e8 03 shr $0x3,%rax 8: 48 89 44 24 28 mov %rax,0x28(%rsp) d: eb 34 jmp 0x43 f: e8 8d 30 22 fd callq 0xfd2230a1 14: 4d 8d 6c 24 20 lea 0x20(%r12),%r13 19: 4c 89 e8 mov %r13,%rax 1c: 48 c1 e8 03 shr $0x3,%rax 20: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) 24: 0f 85 27 06 00 00 jne 0x651 * 2a: 49 8b 44 24 20 mov 0x20(%r12),%rax <-- trapping instruction 2f: 4c 89 e5 mov %r12,%rbp 32: 48 83 e8 20 sub $0x20,%rax 36: 4c 39 2c 24 cmp %r13,(%rsp) 3a: 0f 84 b9 02 00 00 je 0x2f9