vm_page_fault: kernel thread accessing invalid user memory!
vm_page_fault: vm_soft_fault returned error 'Bad address' on fault at 0x6f747372, ip 0x93051e6f, write 0, user 0, thread 0x40
PANIC: vm_page_fault: unhandled page fault in kernel space at 0x6f747372, ip 0x93051e6f

Welcome to Kernel Debugging Land...
Thread 64 "/dev/net/rtl8139/0 reader" running on CPU 0
kdebug> sc
stack trace for thread 64 "/dev/net/rtl8139/0 reader"
    kernel stack: 0x8070a000 to 0x8070e000
frame            caller     <image>:function + offset
 0 8070d984 (+  48) 8005460d   <kernel>:invoke_debugger_command + 0x00ed
 1 8070d9b4 (+  64) 80054405   <kernel>:invoke_pipe_segment__FP21debugger_command_pipelPc + 0x0079
 2 8070d9f4 (+  64) 8005474d   <kernel>:invoke_debugger_command_pipe + 0x009d
 3 8070da34 (+  48) 80055628   <kernel>:_ParseCommandPipe__16ExpressionParserRi + 0x0234
 4 8070da64 (+  48) 80054fde   <kernel>:EvaluateCommand__16ExpressionParserPCcRi + 0x01de
 5 8070da94 (+ 224) 800569f4   <kernel>:evaluate_debug_command + 0x0088
 6 8070db74 (+  64) 80052a82   <kernel>:kernel_debugger_loop__Fv + 0x01ae
 7 8070dbb4 (+  48) 8005361b   <kernel>:kernel_debugger + 0x0117
 8 8070dbe4 (+ 192) 800534f9   <kernel>:panic + 0x0029
 9 8070dca4 (+  80) 800a849d   <kernel>:vm_page_fault + 0x0111
10 8070dcf4 (+  64) 800b43e5   <kernel>:page_fault_exception + 0x00b1
11 8070dd34 (+  12) 800b7946   <kernel>:int_bottom + 0x0036 (nearest)
kernel iframe at 0x8070dd40 (end = 0x8070dd90)
 eax 0x6f747372     ebx 0x93055bc8      ecx 0x800f469c   edx 0x246
 esi 0x5ea          edi 0x80241900      ebp 0x8070dda8   esp 0x8070dd74
 eip 0x93051e6f  eflags 0x10282
 vector: 0xe, error code: 0x0
12 8070dd40 (+ 104) 93051e6f   </boot/beos/system/add-ons/kernel/drivers/dev/net/rtl8139>:m_free + 0x0017
13 8070dda8 (+  48) 93051dd1   </boot/beos/system/add-ons/kernel/drivers/dev/net/rtl8139>:m_freem + 0x0025
14 8070ddd8 (+  64) 9304c99b   </boot/beos/system/add-ons/kernel/drivers/dev/net/rtl8139>:compat_read + 0x0153
15 8070de18 (+  80) 80060d45   <kernel>:devfs_read__FP9fs_volumeP8fs_vnodePvxT2PUl + 0x0121
16 8070de68 (+  64) 8008a664   <kernel>:file_read__FP15file_descriptorxPvPUl + 0x0044
17 8070dea8 (+  96) 8007b949   <kernel>:_kern_read + 0x0145
18 8070df08 (+  64) 800c0b67   <kernel>:read + 0x001f
19 8070df48 (+  64) 805c676b   </boot/beos/system/add-ons/kernel/network/devices/ethernet>:ethernet_receive_data__FP10net_devicePP10net_buffer + 0x00bf
20 8070df88 (+  80) 8054aa7a   </boot/beos/system/add-ons/kernel/network/stack>:device_reader_thread__FPv + 0x007e
21 8070dfd8 (+  32) 8004b2af   <kernel>:_create_kernel_thread_kentry__Fv + 0x001b
22 8070dff8 (+2140086280) 8004b24c   <kernel>:thread_kthread_exit__Fv + 0x0000
kdebug>