hso 4-1:0.0: Failed to find BULK IN ep general protection fault, probably for non-canonical address 0xdffffc000000000c: 0000 [#1] SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000060-0x0000000000000067] CPU: 0 PID: 5592 Comm: kworker/0:7 Not tainted 5.10.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: usb_hub_wq hub_event RIP: 0010:cdev_del+0x22/0x90 fs/char_dev.c:596 Code: b5 0f 1f 80 00 00 00 00 55 48 89 fd 48 83 ec 08 e8 e3 37 cf ff 48 8d 7d 64 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 4f 48 RSP: 0018:ffffc900021d7190 EFLAGS: 00010207 RAX: dffffc0000000000 RBX: ffff888108094700 RCX: ffffffff822f5def RDX: 000000000000000c RSI: ffffffff816f8d7d RDI: 0000000000000064 RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff898cc4ef R10: 0000000000000000 R11: 000000000004c044 R12: ffff888108094708 R13: ffff88810803e000 R14: 0000000000000000 R15: ffff888111eff070 FS: 0000000000000000(0000) GS:ffff8881f6a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055c8e5921050 CR3: 0000000102f03000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: tty_unregister_device drivers/tty/tty_io.c:3198 [inline] tty_unregister_device+0x112/0x1b0 drivers/tty/tty_io.c:3193 hso_serial_tty_unregister drivers/net/usb/hso.c:2232 [inline] hso_create_bulk_serial_device drivers/net/usb/hso.c:2680 [inline] hso_probe.cold+0x70/0x16a drivers/net/usb/hso.c:2946 usb_probe_interface+0x315/0x7f0 drivers/usb/core/driver.c:396 really_probe+0x291/0xde0 drivers/base/dd.c:554 driver_probe_device+0x26b/0x3d0 drivers/base/dd.c:738 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:844 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:431 __device_attach+0x228/0x4a0 drivers/base/dd.c:912 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491 device_add+0xbb2/0x1ce0 drivers/base/core.c:2936 usb_set_configuration+0x113c/0x1910 drivers/usb/core/message.c:2164 usb_generic_driver_probe+0xba/0x100 drivers/usb/core/generic.c:238 usb_probe_device+0xd9/0x2c0 drivers/usb/core/driver.c:293 really_probe+0x291/0xde0 drivers/base/dd.c:554 driver_probe_device+0x26b/0x3d0 drivers/base/dd.c:738 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:844 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:431 __device_attach+0x228/0x4a0 drivers/base/dd.c:912 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491 device_add+0xbb2/0x1ce0 drivers/base/core.c:2936 usb_new_device.cold+0x71d/0xfe9 drivers/usb/core/hub.c:2555 hub_port_connect drivers/usb/core/hub.c:5223 [inline] hub_port_connect_change drivers/usb/core/hub.c:5363 [inline] port_event drivers/usb/core/hub.c:5509 [inline] hub_event+0x2348/0x42d0 drivers/usb/core/hub.c:5591 process_one_work+0x933/0x1520 kernel/workqueue.c:2272 worker_thread+0x64c/0x1120 kernel/workqueue.c:2418 kthread+0x38c/0x460 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Modules linked in: ---[ end trace b7fb24b77aa99eab ]--- RIP: 0010:cdev_del+0x22/0x90 fs/char_dev.c:596 Code: b5 0f 1f 80 00 00 00 00 55 48 89 fd 48 83 ec 08 e8 e3 37 cf ff 48 8d 7d 64 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 4f 48 RSP: 0018:ffffc900021d7190 EFLAGS: 00010207 RAX: dffffc0000000000 RBX: ffff888108094700 RCX: ffffffff822f5def RDX: 000000000000000c RSI: ffffffff816f8d7d RDI: 0000000000000064 RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff898cc4ef R10: 0000000000000000 R11: 000000000004c044 R12: ffff888108094708 R13: ffff88810803e000 R14: 0000000000000000 R15: ffff888111eff070 FS: 0000000000000000(0000) GS:ffff8881f6a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055c8e5921050 CR3: 0000000007025000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400