[ 3121.533315] BUG: unable to handle kernel NULL pointer dereference at 000000bc
[ 3121.533423] IP: [<c045e98d>] tty_buffer_request_room+0x1d/0x128
[ 3121.534062] *pde = 00000000 
[ 3121.534062] *pde = 00000000                                                                                                                                                                              [0/1992]
[ 3121.534223] Oops: 0000 [#1] PREEMPT 
[ 3121.534459] Modules linked in:
[ 3121.534624] 
[ 3121.534724] Pid: 2438, comm: dhclient Not tainted 3.4.0-3-goldfish #14-Ubuntu  
[ 3121.534951] EIP: 0060:[<c045e98d>] EFLAGS: 00010017 CPU: 0
[ 3121.535158] EIP is at tty_buffer_request_room+0x1d/0x128
[ 3121.535294] EAX: 00010203 EBX: 00000000 ECX: df408000 EDX: 00000000
[ 3121.535399] ESI: e1006000 EDI: df409f94 EBP: df409f74 ESP: df409f5c
[ 3121.535593]  DS: 007b ES: 007b FS: 0000 GS: 00e0 SS: 0068
[ 3121.535741] CR0: 80050033 CR2: 000000bc CR3: 1f668000 CR4: 00000690
[ 3121.535844] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
[ 3121.535941] DR6: fffe0ff0 DR7: 00000400
[ 3121.536025] Process dhclient (pid: 2438, ti=df408000 task=cad7a600 task.ti=deddc000)
[ 3121.536083] Stack:
[ 3121.536133]  00000000 00000096 00000001 00000000 e1006000 df409f94 df409f88 c045eadf
[ 3121.536553]  df505cd8 e1006000 c0277a02 df409fa4 c0470246 00000000 df406100 de8a97c0
[ 3121.536960]  df406580 c0277a02 df409fdc c0275bfb 00000000 00000000 00000000 00000000
[ 3121.537280] Call Trace:
[ 3121.537342]  [<c045eadf>] tty_prepare_flip_string+0x11/0x3d
[ 3121.537429]  [<c0277a02>] ? cond_unmask_irq+0x23/0x23
[ 3121.537500]  [<c0470246>] goldfish_tty_interrupt+0x29/0x82
[ 3121.537572]  [<c0277a02>] ? cond_unmask_irq+0x23/0x23
[ 3121.538553]  [<c0275bfb>] handle_irq_event_percpu+0x5a/0x1c4
[ 3121.538671]  [<c0277a02>] ? cond_unmask_irq+0x23/0x23
[ 3121.538764]  [<c0275da3>] handle_irq_event+0x3e/0x57
[ 3121.538833]  [<c0277a7c>] handle_level_irq+0x7a/0xa1
[ 3121.538923]  <IRQ> 
[ 3121.539063]  [<c020301b>] ? do_IRQ+0x34/0x83
[ 3121.539159]  [<c0243380>] ? check_preempt_wakeup+0xfe/0x1ab
[ 3121.539403]  [<c0763a70>] ? common_interrupt+0x30/0x38
[ 3121.539511]  [<c027007b>] ? kdb_grep_help+0x36/0x68
[ 3121.539634]  [<c02700e0>] ? kdb_help+0x33/0x8d
[ 3121.539731]  [<c0275863>] ? __irq_put_desc_unlock+0xb/0x40
[ 3121.539827]  [<c0276613>] ? enable_irq+0x59/0x6d
[ 3121.539940]  [<c0529eb8>] ? ei_start_xmit+0x324/0x385
[ 3121.540008]  [<c023bf13>] ? __wake_up_common+0x33/0x59
[ 3121.540066]  [<c023f7bf>] ? __wake_up_sync_key+0x4b/0x65
[ 3121.540136]  [<c062efbe>] ? sock_def_write_space+0x81/0x85
[ 3121.540199]  [<c063c568>] ? dev_hard_start_xmit+0x37e/0x57f
[ 3121.540292]  [<c02c5f09>] ? __kmalloc_track_caller+0x95/0x11a
[ 3121.540357]  [<c02c4969>] ? kmem_cache_alloc+0x59/0xdf
[ 3121.540424]  [<c064fb17>] ? sch_direct_xmit+0x6a/0x183
[ 3121.540481]  [<c063c98d>] ? dev_queue_xmit+0x224/0x458
[ 3121.540559]  [<c06de17f>] ? packet_sendmsg+0x8fc/0x99a
[ 3121.540634]  [<c03b2c5d>] ? aa_net_perm+0x8c/0xaa
[ 3121.540694]  [<c062c20d>] ? sock_aio_write+0xd3/0xe9
[ 3121.540751]  [<c062dc79>] ? sys_sendto+0xf7/0x130
[ 3121.540815]  [<c02cb08d>] ? do_sync_write+0x9c/0xd8
[ 3121.540874]  [<c02cb715>] ? rw_verify_area+0x83/0xed
[ 3121.540930]  [<c02cba1a>] ? vfs_write+0x99/0x13b
[ 3121.540985]  [<c02cbc8f>] ? sys_write+0x38/0x63
[ 3121.541043]  [<c0763513>] ? sysenter_do_call+0x12/0x22
[ 3121.541095] Code: 86 a8 00 00 00 e8 1a 48 dd ff 5b 5e 5d c3 55 89 e5 57 56 53 89 c3 83 ec 0c 89 55 f0 9c 8f 45 ec fa b8 01 00 00 00 e8 7f 25 30 00 <8b> b3 bc 00 00 00 85 f6 74 08 8b 4e 10 2b 4e 0c eb 02 31 c9 
3b 
[ 3121.542466] EIP: [<c045e98d>] tty_buffer_request_room+0x1d/0x128 SS:ESP 0068:df409f5c
[ 3121.542466] CR2: 00000000000000bc
[ 3121.542466] ---[ end trace 16c9b01d8bb15ce9 ]---
[ 3121.542466] Kernel panic - not syncing: Fatal exception in interrupt
[ 3121.534223] Oops: 0000 [#1] PREEMPT