> tail -f /var/log/syslog KERN: usb hub 36: port 0: new device connected Last message repeated 1 time KERN: usb error hub 36: new device on a port that is already in use KERN: usb_rndis: rndis device 0 added KERN: usb_rndis: mac address: 02:02:63:37:37:6e KERN: usb_rndis: max frame size: 1500 KERN: usb_rndis: media connect state: 1 KERN: usb_rndis: link speed: -2021749710 * 100bps KERN: usb error ehci 4: qtd (0x7f3b800) error: 0x80100d50 DAEMON 'DHCP': /dev/net/usb_rndis/0: Send DHCP_DISCOVER to 255.255.255.255:67 KERN: usb_rndis: Failed to start traffic (response: Device FIFO overrun) KERN: usb error ehci 4: KERN: qtd (0x7f3b580) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 DAEMON 'DHCP': /dev/net/usb_rndis/0: Timeout shift: 500 msecs (try 1) DAEMON 'DHCP': /dev/net/usb_rndis/0: Send DHCP_DISCOVER to 255.255.255.255:67 DAEMON 'DHCP': /dev/net/usb_rndis/0: Timeout shift: 1000 msecs (try 2) DAEMON 'DHCP': /dev/net/usb_rndis/0: Send DHCP_DISCOVER to 255.255.255.255:67 DAEMON 'DHCP': /dev/net/usb_rndis/0: Timeout shift: 2000 msecs (try 3) DAEMON 'DHCP': /dev/net/usb_rndis/0: Send DHCP_DISCOVER to 255.255.255.255:67 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f3bb80) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 DAEMON 'DHCP': /dev/net/usb_rndis/0: Timeout shift: 4000 msecs (try 4) DAEMON 'DHCP': /dev/net/usb_rndis/0: Send DHCP_DISCOVER to 255.255.255.255:67 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f3bf00) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f3c280) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 DAEMON 'DHCP': /dev/net/usb_rndis/0: Timeout shift: 8000 msecs (try 5) DAEMON 'DHCP': /dev/net/usb_rndis/0: Send DHCP_DISCOVER to 255.255.255.255:67 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f3c600) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f3c980) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f3cd00) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f3d080) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 DAEMON 'DHCP': /dev/net/usb_rndis/0: Timeout shift: 60000 msecs (try 6) DAEMON 'DHCP': /dev/net/usb_rndis/0: Send DHCP_DISCOVER to 255.255.255.255:67 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f3d400) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f3d780) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f3db00) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f3de80) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: KERN: qtd (0x7f3e200) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 66: KERN: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f3e580) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f3e900) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f3ec80) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f3f000) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f3f380) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f3f700) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f3fa80) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f3fe00) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f40180) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f40500) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f40880) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 66: KERN: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f40c00) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f40f80) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f41300) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f41680) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 66: KERN: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f41a00) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 66: KERN: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f41d80) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 66: KERN: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f42100) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f42480) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f42800) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f42b80) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f42f00) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f43280) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f43600) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook DAEMON 'DHCP': /dev/net/usb_rndis/0: Send DHCP_REQUEST to 255.255.255.255:67 KERN: usb error ehci 4: qtd (0x7f43980) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 DAEMON 'DHCP': /dev/net/usb_rndis/0: Send DHCP_DISCOVER to 255.255.255.255:67 DAEMON 'DHCP': /dev/net/usb_rndis/0: Timeout shift: 500 msecs (try 1) DAEMON 'DHCP': /dev/net/usb_rndis/0: Send DHCP_DISCOVER to 255.255.255.255:67 KERN: usb hub 36: port 0: new device connected DAEMON 'DHCP': /dev/net/usb_rndis/0: Timeout shift: 1000 msecs (try 2) DAEMON 'DHCP': /dev/net/usb_rndis/0: Send DHCP_DISCOVER to 255.255.255.255:67 KERN: usb error hub 36: new device on a port that is already in use DAEMON 'DHCP': /dev/net/usb_rndis/0: Timeout shift: 2000 msecs (try 3) DAEMON 'DHCP': /dev/net/usb_rndis/0: Send DHCP_DISCOVER to 255.255.255.255:67 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f43b80) error: 0x80008148 KERN: usb error ehci 4: qtd (0x7f43f00) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 40: timeout waiting for queued request to complete DAEMON 'DHCP': /dev/net/usb_rndis/0: Timeout shift: 4000 msecs (try 4) DAEMON 'DHCP': /dev/net/usb_rndis/0: Send DHCP_DISCOVER to 255.255.255.255:67 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: KERN: qtd (0x7f44080) error: 0x00080248 KERN: usb error ehci 4: qtd (0x7f44480) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 40: timeout waiting for queued request to complete KERN: usb error control pipe 66: KERN: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f44600) error: 0x00080248 KERN: usb error ehci 4: qtd (0x7f44a00) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 40: timeout waiting for queued request to complete KERN: usb error ehci 4: error while setting device address DAEMON 'DHCP': /dev/net/usb_rndis/0: Timeout shift: 8000 msecs (try 5) DAEMON 'DHCP': /dev/net/usb_rndis/0: Send DHCP_DISCOVER to 255.255.255.255:67 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f44880) error: 0x80008148 KERN: usb error ehci 4: qtd (0x7f44b80) error: 0x00080248 KERN: usb error ehci 4: qtd (0x7f44f80) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 40: KERN: timeout waiting for queued request to complete KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f45100) error: 0x00080248 KERN: usb error ehci 4: qtd (0x7f45500) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 40: timeout waiting for queued request to complete KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: KERN: qtd (0x7f45680) error: 0x00080248 KERN: usb error ehci 4: qtd (0x7f45880) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f45a00) error: 0x00080248 KERN: usb error ehci 4: qtd (0x7f45e00) error: 0x00088148 KERN: usb_rndis: device status error 0x8000a014 KERN: usb error control pipe 40: timeout waiting for queued request to complete KERN: usb error ehci 4: error while setting device address DAEMON 'DHCP': /dev/net/usb_rndis/0: Timeout shift: 60000 msecs (try 6) DAEMON 'DHCP': /dev/net/usb_rndis/0: Send DHCP_DISCOVER to 255.255.255.255:67 KERN: usb error control pipe 66: timeout waiting for queued request to complete KERN: usb_rndis: failed to clear halt state in notify hook KERN: usb error ehci 4: qtd (0x7f45c80) error: 0x80008148 KERN: write access attempted on write-protected area 0x4a73 at 0xffffffffa0e68000 KERN: usb error ehci 4: KERN: vm_page_fault: vm_soft_fault returned error 'Permission denied' on fault at 0xffffffffa0e68008, ip 0xffffffff877e7e9a, write 1, user 0, exec 0, thread 0x12 KERN: PANIC: vm_page_fault: unhandled page fault in kernel space at 0xffffffffa0e68008, ip 0xffffffff877e7e9a KERN: KERN: Welcome to Kernel Debugging Land... KERN: Thread 18 "usb explore" running on CPU 0 KERN: stack trace for thread 18 "usb explore" KERN: kernel stack: 0xffffffff8125a000 to 0xffffffff8125f000 KERN: frame caller :function + offset KERN: 0 ffffffff8125e770 (+ 32) ffffffff8014b640 arch_debug_call_with_fault_handler + 0x1a KERN: 1 ffffffff8125e790 (+ 80) ffffffff800b3ac8 debug_call_with_fault_handler + 0x78 KERN: 2 ffffffff8125e7e0 (+ 96) ffffffff800b5174 kgets (nearest) + 0x654 KERN: 3 ffffffff8125e840 (+ 80) ffffffff800b550e kgets (nearest) + 0x9ee KERN: 4 ffffffff8125e890 (+ 240) ffffffff800b58a7 panic + 0xb7 KERN: 5 ffffffff8125e980 (+ 240) ffffffff80134850 vm_page_fault + 0x2e0 KERN: 6 ffffffff8125ea70 (+ 64) ffffffff801578ee x86_page_fault_exception + 0x15e KERN: 7 ffffffff8125eab0 (+ 584) ffffffff8014cf1c isr_array (nearest) + 0x107c KERN: kernel iframe at 0xffffffff8125ecf8 (end = 0xffffffff8125edc0) KERN: rax 0xffffffff877e7e90 rbx 0xffffffffa0e68000 rcx 0x0 KERN: rdx 0xffffffffa0e68048 rsi 0x8000000c rdi 0xffffffffa0e68000 KERN: rbp 0xffffffff8125edd0 r8 0xffffffffa0e68048 r9 0x0 KERN: r10 0x0 r11 0x3 r12 0x0 KERN: r13 0xffffffffa0a236a0 r14 0xffffffff8209f000 r15 0x0 KERN: rip 0xffffffff877e7e9a rsp 0xffffffff8125edc0 rflags 0x10246 KERN: vector: 0xe, error code: 0x2 KERN: 8 ffffffff8125ecf8 (+ 216) ffffffff877e7e9a RNDISDevice::_NotifyCallback(void*, int, void*, unsigned long) + 0x0a KERN: 9 ffffffff8125edd0 (+ 64) ffffffff8172deb7 EHCI::CancelQueuedTransfers(Pipe*, bool) + 0xb7 KERN: 10 ffffffff8125ee10 (+ 32) ffffffff8170531a cancel_queued_transfers(unsigned int) + 0x3a KERN: 11 ffffffff8125ee30 (+ 48) ffffffff81871d20 + 0xd20 KERN: 12 ffffffff8125ee60 (+ 96) ffffffff81733bf4 _ZN11EHCIRootHubD0Ev (nearest) + 0x1324 KERN: 13 ffffffff8125eec0 (+ 96) ffffffff81706190 _Z9usb_ioctljPvm (nearest) + 0xa10 KERN: 14 ffffffff8125ef20 (+ 112) ffffffff81706303 _Z9usb_ioctljPvm (nearest) + 0xb83 KERN: 15 ffffffff8125ef90 (+ 32) ffffffff81706428 _Z9usb_ioctljPvm (nearest) + 0xca8 KERN: 16 ffffffff8125efb0 (+ 32) ffffffff8008c5d7 thread_exit (nearest) + 0xed7 KERN: 17 ffffffff8125efd0 (+2128220208) ffffffff8125efe0 150:usb explore_18_kstack@0xffffffff8125a000 + 0x4fe0 KERN: kdebug> cont KERN: qtd (0x7f45f80) error: 0x00080248 KERN: usb hub 36: port 0: device removed