[  428.320871] BUG: Bad page state in process vb2-cx23885[0]  pfn:78714
[  428.320944] page:ffffea0001e1c500 count:-1 mapcount:0 mapping:          (null) index:0x0
[  428.320979] vb2: counters for queue ffff880076285828: UNBALANCED!
[  428.320983] vb2:     setup: 1 start_streaming: 1 stop_streaming: 1
[  428.320986] vb2:     wait_prepare: 17934 wait_finish: 17935
[  428.320990] vb2:   counters for queue ffff880076285828, buffer 25: UNBALANCED!
[  428.320992] vb2:     buf_init: 1 buf_cleanup: 1 buf_prepare: 187 buf_finish: 188
[  428.320994] vb2:     buf_queue: 187 buf_done: 187
[  428.320996] vb2:     alloc: 1 put: 1 prepare: 187 finish: 187 mmap: 0
[  428.320997] vb2:     get_userptr: 0 put_userptr: 0
[  428.320999] vb2:     attach_dmabuf: 0 detach_dmabuf: 0 map_dmabuf: 0 unmap_dmabuf: 0
[  428.321001] vb2:     get_dmabuf: 0 num_users: 0 vaddr: 188 cookie: 188
[  428.321026] page flags: 0x1ffff0000000000()
[  428.321113] Modules linked in: xt_multiport ipt_MASQUERADE iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT xt_CHECKSUM iptable_mangle xt_tcpudp bridge stp llc ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables dm_crypt si2157(OX) si2168(OX) m88ts2022(OX) m88ds3103(OX) i2c_mux rc_it913x_v1(OX) it913x(OX) af9033(OX) cx25840(OX) kvm_amd kvm dm_multipath scsi_dh cx23885(OX) altera_ci(OX) tda18271(OX) altera_stapl(OX) videobuf2_dvb(OX) amd64_edac_mod tveeprom(OX) cx2341x(OX) dvb_usb_af9035(OX) videobuf2_dma_sg(OX) k10temp edac_core dvb_usb_v2(OX) edac_mce_amd dvb_core(OX) rc_core(OX) videobuf2_memops(OX) videobuf2_core(OX) sp5100_tco i2c_piix4 v4l2_common(OX) videodev(OX) media(OX) snd_pcm snd_page_alloc nfsd snd_timer auth_rpcgss nfs_acl mac_hid snd nfs soundcore lockd parport_pc ppdev sunrpc lp parport shpchp msr fscache raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq raid0 multipath linear raid1 radeon i2c_algo_bit ttm drm_kms_helper tg3 drm usb_storage ptp pps_core ahci libahci
[  428.321262] CPU: 0 PID: 3534 Comm: vb2-cx23885[0] Tainted: G           OX 3.13.0-40-generic #69-Ubuntu
[  428.321267] Hardware name: HP ProLiant MicroServer, BIOS O41     07/29/2011
[  428.321272]  ffff88007dc177c8 ffff880076be1af8 ffffffff8171f226 ffffea0001e1c500
[  428.321281]  ffff880076be1b10 ffffffff81719d40 0000000000000001 ffff880076be1bf0
[  428.321288]  ffffffff811584ca ffff88007df8ce08 0000000100000000 ffff880075943a00
[  428.321295] Call Trace:
[  428.321309]  [<ffffffff8171f226>] dump_stack+0x45/0x56
[  428.321319]  [<ffffffff81719d40>] bad_page.part.61+0xcf/0xe8
[  428.321329]  [<ffffffff811584ca>] get_page_from_freelist+0x85a/0x930
[  428.321338]  [<ffffffff8109f409>] ? wakeup_gran.isra.47+0x29/0x30
[  428.321347]  [<ffffffff810981c5>] ? check_preempt_curr+0x85/0xa0
[  428.321355]  [<ffffffff81158724>] __alloc_pages_nodemask+0x184/0xb80
[  428.321364]  [<ffffffff8109a9b2>] ? default_wake_function+0x12/0x20
[  428.321372]  [<ffffffff810aa9b8>] ? __wake_up_common+0x58/0x90
[  428.321381]  [<ffffffff810aa9b8>] ? __wake_up_common+0x58/0x90
[  428.321390]  [<ffffffff81019a34>] dma_generic_alloc_coherent+0xa4/0x150
[  428.321412]  [<ffffffffa054f7f2>] cx23885_risc_databuffer+0xb2/0x170 [cx23885]
[  428.321419]  [<ffffffff810a02bf>] ? pick_next_task_fair+0x5f/0x1b0
[  428.321438]  [<ffffffffa0550627>] cx23885_buf_prepare+0x77/0xd0 [cx23885]
[  428.321455]  [<ffffffffa0551ca9>] buffer_prepare+0x19/0x20 [cx23885]
[  428.321470]  [<ffffffffa04957de>] __buf_prepare+0x27e/0x390 [videobuf2_core]
[  428.321483]  [<ffffffffa0496fdb>] vb2_internal_qbuf+0x6b/0x220 [videobuf2_core]
[  428.321497]  [<ffffffffa049729e>] vb2_thread+0x10e/0x480 [videobuf2_core]
[  428.321510]  [<ffffffffa0497190>] ? vb2_internal_qbuf+0x220/0x220 [videobuf2_core]
[  428.321518]  [<ffffffff8108b562>] kthread+0xd2/0xf0
[  428.321525]  [<ffffffff8108b490>] ? kthread_create_on_node+0x1c0/0x1c0
[  428.321533]  [<ffffffff8172fc7c>] ret_from_fork+0x7c/0xb0
[  428.321540]  [<ffffffff8108b490>] ? kthread_create_on_node+0x1c0/0x1c0
[  428.321545] Disabling lock debugging due to kernel taint
[  450.319907] vb2: counters for queue ffff880076285828: UNBALANCED!
[  450.319920] vb2:     setup: 1 start_streaming: 1 stop_streaming: 1
[  450.319925] vb2:     wait_prepare: 15827 wait_finish: 15826
[ 1699.696858] si2168 7-0064: found a 'Silicon Labs Si2168' in cold state
[ 1699.722904] si2168 7-0064: downloading firmware from file 'dvb-demod-si2168-a30-01.fw'
[ 1702.790930] si2168 7-0064: found a 'Silicon Labs Si2168' in warm state
[ 1702.798323] si2157 12-0060: found a 'Silicon Labs Si2146/2147/2148/2157/2158' in cold state
[ 1702.817888] si2157 12-0060: downloading firmware from file 'dvb-tuner-si2158-a20-01.fw'
[ 6876.284572] BUG: Bad page state in process vb2-cx23885[0]  pfn:7690c
[ 6876.284642] page:ffffea0001da4300 count:-1 mapcount:0 mapping:          (null) index:0x0
[ 6876.284680] vb2: counters for queue ffff880076285828: UNBALANCED!
[ 6876.284684] vb2:     setup: 1 start_streaming: 1 stop_streaming: 1
[ 6876.284686] vb2:     wait_prepare: 17316 wait_finish: 17317
[ 6876.284690] vb2:   counters for queue ffff880076285828, buffer 11: UNBALANCED!
[ 6876.284692] vb2:     buf_init: 1 buf_cleanup: 1 buf_prepare: 181 buf_finish: 182
[ 6876.284694] vb2:     buf_queue: 181 buf_done: 181
[ 6876.284696] vb2:     alloc: 1 put: 1 prepare: 181 finish: 181 mmap: 0
[ 6876.284697] vb2:     get_userptr: 0 put_userptr: 0
[ 6876.284699] vb2:     attach_dmabuf: 0 detach_dmabuf: 0 map_dmabuf: 0 unmap_dmabuf: 0
[ 6876.284701] vb2:     get_dmabuf: 0 num_users: 0 vaddr: 182 cookie: 182
[ 6876.284723] page flags: 0x1ffff0000000000()
[ 6876.284766] Modules linked in: xt_multiport ipt_MASQUERADE iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT xt_CHECKSUM iptable_mangle xt_tcpudp bridge stp llc ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables dm_crypt si2157(OX) si2168(OX) m88ts2022(OX) m88ds3103(OX) i2c_mux rc_it913x_v1(OX) it913x(OX) af9033(OX) cx25840(OX) kvm_amd kvm dm_multipath scsi_dh cx23885(OX) altera_ci(OX) tda18271(OX) altera_stapl(OX) videobuf2_dvb(OX) amd64_edac_mod tveeprom(OX) cx2341x(OX) dvb_usb_af9035(OX) videobuf2_dma_sg(OX) k10temp edac_core dvb_usb_v2(OX) edac_mce_amd dvb_core(OX) rc_core(OX) videobuf2_memops(OX) videobuf2_core(OX) sp5100_tco i2c_piix4 v4l2_common(OX) videodev(OX) media(OX) snd_pcm snd_page_alloc nfsd snd_timer auth_rpcgss nfs_acl mac_hid snd nfs soundcore lockd parport_pc ppdev sunrpc lp parport shpchp msr fscache raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq raid0 multipath linear raid1 radeon i2c_algo_bit ttm drm_kms_helper tg3 drm usb_storage ptp pps_core ahci libahci
[ 6876.284913] CPU: 1 PID: 5579 Comm: vb2-cx23885[0] Tainted: G    B      OX 3.13.0-40-generic #69-Ubuntu
[ 6876.284918] Hardware name: HP ProLiant MicroServer, BIOS O41     07/29/2011
[ 6876.284923]  ffff88007dc977c8 ffff880049747af8 ffffffff8171f226 ffffea0001da4300
[ 6876.284931]  ffff880049747b10 ffffffff81719d40 0000000000000001 ffff880049747bf0
[ 6876.284939]  ffffffff811584ca ffff88007df8ce08 0000000100000000 ffff880075943a00
[ 6876.284945] Call Trace:
[ 6876.284960]  [<ffffffff8171f226>] dump_stack+0x45/0x56
[ 6876.284970]  [<ffffffff81719d40>] bad_page.part.61+0xcf/0xe8
[ 6876.284979]  [<ffffffff811584ca>] get_page_from_freelist+0x85a/0x930
[ 6876.284988]  [<ffffffff81158724>] __alloc_pages_nodemask+0x184/0xb80
[ 6876.284998]  [<ffffffff8109a9b2>] ? default_wake_function+0x12/0x20
[ 6876.285007]  [<ffffffff810aa9b8>] ? __wake_up_common+0x58/0x90
[ 6876.285016]  [<ffffffff810aa9b8>] ? __wake_up_common+0x58/0x90
[ 6876.285025]  [<ffffffff81019a34>] dma_generic_alloc_coherent+0xa4/0x150
[ 6876.285047]  [<ffffffffa054f7f2>] cx23885_risc_databuffer+0xb2/0x170 [cx23885]
[ 6876.285065]  [<ffffffffa0550627>] cx23885_buf_prepare+0x77/0xd0 [cx23885]
[ 6876.285082]  [<ffffffffa0551ca9>] buffer_prepare+0x19/0x20 [cx23885]
[ 6876.285096]  [<ffffffffa04957de>] __buf_prepare+0x27e/0x390 [videobuf2_core]
[ 6876.285110]  [<ffffffffa0496fdb>] vb2_internal_qbuf+0x6b/0x220 [videobuf2_core]
[ 6876.285123]  [<ffffffffa049729e>] vb2_thread+0x10e/0x480 [videobuf2_core]
[ 6876.285137]  [<ffffffffa0497190>] ? vb2_internal_qbuf+0x220/0x220 [videobuf2_core]
[ 6876.285145]  [<ffffffff8108b562>] kthread+0xd2/0xf0
[ 6876.285152]  [<ffffffff8108b490>] ? kthread_create_on_node+0x1c0/0x1c0
[ 6876.285160]  [<ffffffff8172fc7c>] ret_from_fork+0x7c/0xb0
[ 6876.285167]  [<ffffffff8108b490>] ? kthread_create_on_node+0x1c0/0x1c0
[ 6923.284328] vb2: counters for queue ffff880076285828: UNBALANCED!
[ 6923.284340] vb2:     setup: 1 start_streaming: 1 stop_streaming: 1
[ 6923.284345] vb2:     wait_prepare: 13835 wait_finish: 13834
[10348.266030] BUG: unable to handle kernel NULL pointer dereference at 0000000000000260
[10348.266124] IP: [<ffffffffa04b51ef>] dvb_fnc+0xf/0x40 [videobuf2_dvb]
[10348.266193] PGD 77a77067 PUD 78da3067 PMD 0 
[10348.266251] Oops: 0000 [#1] SMP 
[10348.266295] Modules linked in: xt_multiport ipt_MASQUERADE iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT xt_CHECKSUM iptable_mangle xt_tcpudp bridge stp llc ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables dm_crypt si2157(OX) si2168(OX) m88ts2022(OX) m88ds3103(OX) i2c_mux rc_it913x_v1(OX) it913x(OX) af9033(OX) cx25840(OX) kvm_amd kvm dm_multipath scsi_dh cx23885(OX) altera_ci(OX) tda18271(OX) altera_stapl(OX) videobuf2_dvb(OX) amd64_edac_mod tveeprom(OX) cx2341x(OX) dvb_usb_af9035(OX) videobuf2_dma_sg(OX) k10temp edac_core dvb_usb_v2(OX) edac_mce_amd dvb_core(OX) rc_core(OX) videobuf2_memops(OX) videobuf2_core(OX) sp5100_tco i2c_piix4 v4l2_common(OX) videodev(OX) media(OX) snd_pcm snd_page_alloc nfsd snd_timer auth_rpcgss nfs_acl mac_hid snd nfs soundcore lockd parport_pc ppdev sunrpc lp parport shpchp msr fscache raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq raid0 multipath linear raid1 radeon i2c_algo_bit ttm drm_kms_helper tg3 drm usb_storage ptp pps_core ahci libahci
[10348.267765] CPU: 1 PID: 6241 Comm: vb2-cx23885[0] Tainted: G    B      OX 3.13.0-40-generic #69-Ubuntu
[10348.267837] Hardware name: HP ProLiant MicroServer, BIOS O41     07/29/2011
[10348.267890] task: ffff88007635b000 ti: ffff880032196000 task.ti: ffff880032196000
[10348.267946] RIP: 0010:[<ffffffffa04b51ef>]  [<ffffffffa04b51ef>] dvb_fnc+0xf/0x40 [videobuf2_dvb]
[10348.268027] RSP: 0018:ffff880032197e50  EFLAGS: 00010246
[10348.268075] RAX: 0000000000000000 RBX: ffff880077024400 RCX: 0000000000000000
[10348.268134] RDX: ffff880032197fd8 RSI: ffff880076285818 RDI: 0000000000000000
[10348.268186] RBP: ffff880032197e60 R08: ffff880032196000 R09: 0000000000000000
[10348.268238] R10: 0000000000000000 R11: ffffffffa0498dba R12: ffff880076285818
[10348.268290] R13: ffff880076bc2160 R14: 0000000000000000 R15: ffff880076285828
[10348.268344] FS:  00007f20d37fe700(0000) GS:ffff88007dc80000(0000) knlGS:0000000000000000
[10348.268412] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[10348.268461] CR2: 0000000000000260 CR3: 0000000077a6b000 CR4: 00000000000007e0
[10348.268513] Stack:
[10348.268535]  ffff880077024400 ffff880077024458 ffff880032197ec8 ffffffffa0497428
[10348.268625]  ffff88007635b000 ffff880077024470 0000000000014480 0000000000000000
[10348.268713]  0000000000000000 ffff880076285828 ffff8800357d0bc0 ffff880076285828
[10348.268801] Call Trace:
[10348.268845]  [<ffffffffa0497428>] vb2_thread+0x298/0x480 [videobuf2_core]
[10348.268914]  [<ffffffffa0497190>] ? vb2_internal_qbuf+0x220/0x220 [videobuf2_core]
[10348.268976]  [<ffffffff8108b562>] kthread+0xd2/0xf0
[10348.269024]  [<ffffffff8108b490>] ? kthread_create_on_node+0x1c0/0x1c0
[10348.269085]  [<ffffffff8172fc7c>] ret_from_fork+0x7c/0xb0
[10348.269136]  [<ffffffff8108b490>] ? kthread_create_on_node+0x1c0/0x1c0
[10348.269193] Code: eb c8 66 2e 0f 1f 84 00 00 00 00 00 44 8b ab 90 02 00 00 eb b5 b8 ea ff ff ff eb b9 66 66 66 66 90 55 48 89 e5 41 54 49 89 f4 53 <8b> 87 60 02 00 00 31 db 85 c0 74 03 8b 5f 58 31 f6 e8 5b e6 fd 
[10348.272760] RIP  [<ffffffffa04b51ef>] dvb_fnc+0xf/0x40 [videobuf2_dvb]
[10348.275776]  RSP <ffff880032197e50>
[10348.279057] CR2: 0000000000000260
[10348.288798] ---[ end trace e65c87e31c08e6a7 ]---
[16170.232066] vb2:   counters for queue ffff880076285828, buffer 15: UNBALANCED!
[16170.235157] vb2:     buf_init: 1 buf_cleanup: 1 buf_prepare: 145 buf_finish: 144
[16170.238222] vb2:     buf_queue: 144 buf_done: 144
[16170.241418] vb2:     alloc: 1 put: 1 prepare: 144 finish: 144 mmap: 0
[16170.244617] vb2:     get_userptr: 0 put_userptr: 0
[16170.247768] vb2:     attach_dmabuf: 0 detach_dmabuf: 0 map_dmabuf: 0 unmap_dmabuf: 0
[16170.250691] vb2:     get_dmabuf: 0 num_users: 0 vaddr: 145 cookie: 145
[17323.224474] BUG: Bad page state in process vb2-cx23885[0]  pfn:4960b
[17323.224592] vb2: counters for queue ffff880076285828: UNBALANCED!
[17323.224596] vb2:     setup: 1 start_streaming: 1 stop_streaming: 1
[17323.224599] vb2:     wait_prepare: 22560 wait_finish: 22561
[17323.224603] vb2:   counters for queue ffff880076285828, buffer 31: UNBALANCED!
[17323.224605] vb2:     buf_init: 1 buf_cleanup: 1 buf_prepare: 235 buf_finish: 236
[17323.224607] vb2:     buf_queue: 235 buf_done: 235
[17323.224609] vb2:     alloc: 1 put: 1 prepare: 235 finish: 235 mmap: 0
[17323.224611] vb2:     get_userptr: 0 put_userptr: 0
[17323.224613] vb2:     attach_dmabuf: 0 detach_dmabuf: 0 map_dmabuf: 0 unmap_dmabuf: 0
[17323.224615] vb2:     get_dmabuf: 0 num_users: 0 vaddr: 236 cookie: 236
[17323.256276] page:ffffea00012582c0 count:-1 mapcount:0 mapping:          (null) index:0x0
[17323.259069] page flags: 0x1ffff0000000000()
[17323.261640] Modules linked in: xt_multiport ipt_MASQUERADE iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT xt_CHECKSUM iptable_mangle xt_tcpudp bridge stp llc ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables dm_crypt si2157(OX) si2168(OX) m88ts2022(OX) m88ds3103(OX) i2c_mux rc_it913x_v1(OX) it913x(OX) af9033(OX) cx25840(OX) kvm_amd kvm dm_multipath scsi_dh cx23885(OX) altera_ci(OX) tda18271(OX) altera_stapl(OX) videobuf2_dvb(OX) amd64_edac_mod tveeprom(OX) cx2341x(OX) dvb_usb_af9035(OX) videobuf2_dma_sg(OX) k10temp edac_core dvb_usb_v2(OX) edac_mce_amd dvb_core(OX) rc_core(OX) videobuf2_memops(OX) videobuf2_core(OX) sp5100_tco i2c_piix4 v4l2_common(OX) videodev(OX) media(OX) snd_pcm snd_page_alloc nfsd snd_timer auth_rpcgss nfs_acl mac_hid snd nfs soundcore lockd parport_pc ppdev sunrpc lp parport shpchp msr fscache raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq raid0 multipath linear raid1 radeon i2c_algo_bit ttm drm_kms_helper tg3 drm usb_storage ptp pps_core ahci libahci
[17323.286984] CPU: 0 PID: 14198 Comm: vb2-cx23885[0] Tainted: G    B D    OX 3.13.0-40-generic #69-Ubuntu
[17323.289892] Hardware name: HP ProLiant MicroServer, BIOS O41     07/29/2011
[17323.292740]  ffff88007dc177c8 ffff88007697daf8 ffffffff8171f226 ffffea00012582c0
[17323.295613]  ffff88007697db10 ffffffff81719d40 0000000000000001 ffff88007697dbf0
[17323.298473]  ffffffff811584ca ffff88007df8ce08 0000000100000000 ffff8800360de400
[17323.301341] Call Trace:
[17323.304484]  [<ffffffff8171f226>] dump_stack+0x45/0x56
[17323.307598]  [<ffffffff81719d40>] bad_page.part.61+0xcf/0xe8
[17323.310674]  [<ffffffff811584ca>] get_page_from_freelist+0x85a/0x930
[17323.313553]  [<ffffffff81158724>] __alloc_pages_nodemask+0x184/0xb80
[17323.316402]  [<ffffffff8109a9b2>] ? default_wake_function+0x12/0x20
[17323.319499]  [<ffffffff810aa9b8>] ? __wake_up_common+0x58/0x90
[17323.322625]  [<ffffffff810aa9b8>] ? __wake_up_common+0x58/0x90
[17323.325602]  [<ffffffff81019a34>] dma_generic_alloc_coherent+0xa4/0x150
[17323.328490]  [<ffffffffa054f7f2>] cx23885_risc_databuffer+0xb2/0x170 [cx23885]
[17323.331372]  [<ffffffffa0550627>] cx23885_buf_prepare+0x77/0xd0 [cx23885]
[17323.333952]  [<ffffffffa0551ca9>] buffer_prepare+0x19/0x20 [cx23885]
[17323.336576]  [<ffffffffa04957de>] __buf_prepare+0x27e/0x390 [videobuf2_core]
[17323.339435]  [<ffffffffa0496fdb>] vb2_internal_qbuf+0x6b/0x220 [videobuf2_core]
[17323.341997]  [<ffffffffa049729e>] vb2_thread+0x10e/0x480 [videobuf2_core]
[17323.344825]  [<ffffffffa0497190>] ? vb2_internal_qbuf+0x220/0x220 [videobuf2_core]
[17323.347655]  [<ffffffff8108b562>] kthread+0xd2/0xf0
[17323.350237]  [<ffffffff8108b490>] ? kthread_create_on_node+0x1c0/0x1c0
[17323.353070]  [<ffffffff8172fc7c>] ret_from_fork+0x7c/0xb0
[17323.355941]  [<ffffffff8108b490>] ? kthread_create_on_node+0x1c0/0x1c0
[17374.225584] vb2: counters for queue ffff880076285828: UNBALANCED!
[17374.228125] vb2:     setup: 1 start_streaming: 1 stop_streaming: 1
[17374.230608] vb2:     wait_prepare: 17926 wait_finish: 17925
[22108.198540] BUG: Bad page state in process vb2-cx23885[0]  pfn:76965
[22108.198665] vb2: counters for queue ffff880076285828: UNBALANCED!
[22108.198669] vb2:     setup: 1 start_streaming: 1 stop_streaming: 1
[22108.198671] vb2:     wait_prepare: 13825 wait_finish: 13826
[22108.198675] vb2:   counters for queue ffff880076285828, buffer 31: UNBALANCED!
[22108.198678] vb2:     buf_init: 1 buf_cleanup: 1 buf_prepare: 144 buf_finish: 145
[22108.198680] vb2:     buf_queue: 144 buf_done: 144
[22108.198682] vb2:     alloc: 1 put: 1 prepare: 144 finish: 144 mmap: 0
[22108.198683] vb2:     get_userptr: 0 put_userptr: 0
[22108.198685] vb2:     attach_dmabuf: 0 detach_dmabuf: 0 map_dmabuf: 0 unmap_dmabuf: 0
[22108.198688] vb2:     get_dmabuf: 0 num_users: 0 vaddr: 145 cookie: 145
[22108.228205] page:ffffea0001da5940 count:-1 mapcount:0 mapping:          (null) index:0x0
[22108.230747] page flags: 0x1ffff0000000000()
[22108.233176] Modules linked in: xt_multiport ipt_MASQUERADE iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT xt_CHECKSUM iptable_mangle xt_tcpudp bridge stp llc ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables dm_crypt si2157(OX) si2168(OX) m88ts2022(OX) m88ds3103(OX) i2c_mux rc_it913x_v1(OX) it913x(OX) af9033(OX) cx25840(OX) kvm_amd kvm dm_multipath scsi_dh cx23885(OX) altera_ci(OX) tda18271(OX) altera_stapl(OX) videobuf2_dvb(OX) amd64_edac_mod tveeprom(OX) cx2341x(OX) dvb_usb_af9035(OX) videobuf2_dma_sg(OX) k10temp edac_core dvb_usb_v2(OX) edac_mce_amd dvb_core(OX) rc_core(OX) videobuf2_memops(OX) videobuf2_core(OX) sp5100_tco i2c_piix4 v4l2_common(OX) videodev(OX) media(OX) snd_pcm snd_page_alloc nfsd snd_timer auth_rpcgss nfs_acl mac_hid snd nfs soundcore lockd parport_pc ppdev sunrpc lp parport shpchp msr fscache raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq raid0 multipath linear raid1 radeon i2c_algo_bit ttm drm_kms_helper tg3 drm usb_storage ptp pps_core ahci libahci
[22108.256199] CPU: 1 PID: 17818 Comm: vb2-cx23885[0] Tainted: G    B D    OX 3.13.0-40-generic #69-Ubuntu
[22108.258800] Hardware name: HP ProLiant MicroServer, BIOS O41     07/29/2011
[22108.261390]  ffff88007dc977c8 ffff880049609af8 ffffffff8171f226 ffffea0001da5940
[22108.264145]  ffff880049609b10 ffffffff81719d40 0000000000000001 ffff880049609bf0
[22108.266824]  ffffffff811584ca ffff88007df8ce08 0000000100000000 00000000000003ff
[22108.269474] Call Trace:
[22108.272366]  [<ffffffff8171f226>] dump_stack+0x45/0x56
[22108.275315]  [<ffffffff81719d40>] bad_page.part.61+0xcf/0xe8
[22108.278247]  [<ffffffff811584ca>] get_page_from_freelist+0x85a/0x930
[22108.281224]  [<ffffffff81158724>] __alloc_pages_nodemask+0x184/0xb80
[22108.281233]  [<ffffffff8109a9b2>] ? default_wake_function+0x12/0x20
[22108.281240]  [<ffffffff810aa9b8>] ? __wake_up_common+0x58/0x90
[22108.281255]  [<ffffffff810aa9b8>] ? __wake_up_common+0x58/0x90
[22108.281263]  [<ffffffff81019a34>] dma_generic_alloc_coherent+0xa4/0x150
[22108.281284]  [<ffffffffa054f7f2>] cx23885_risc_databuffer+0xb2/0x170 [cx23885]
[22108.281300]  [<ffffffffa0550627>] cx23885_buf_prepare+0x77/0xd0 [cx23885]
[22108.281315]  [<ffffffffa0551ca9>] buffer_prepare+0x19/0x20 [cx23885]
[22108.281327]  [<ffffffffa04957de>] __buf_prepare+0x27e/0x390 [videobuf2_core]
[22108.281338]  [<ffffffffa0496fdb>] vb2_internal_qbuf+0x6b/0x220 [videobuf2_core]
[22108.281349]  [<ffffffffa049729e>] vb2_thread+0x10e/0x480 [videobuf2_core]
[22108.281360]  [<ffffffffa0497190>] ? vb2_internal_qbuf+0x220/0x220 [videobuf2_core]
[22108.281366]  [<ffffffff8108b562>] kthread+0xd2/0xf0
[22108.281371]  [<ffffffff8108b490>] ? kthread_create_on_node+0x1c0/0x1c0
[22108.281376]  [<ffffffff8172fc7c>] ret_from_fork+0x7c/0xb0
[22108.281380]  [<ffffffff8108b490>] ? kthread_create_on_node+0x1c0/0x1c0
[22150.198535] vb2: counters for queue ffff880076285828: UNBALANCED!
[22150.201129] vb2:     setup: 1 start_streaming: 1 stop_streaming: 1
[22150.203636] vb2:     wait_prepare: 11132 wait_finish: 11131
[26690.172797] vb2: counters for queue ffff880076285828: UNBALANCED!
[26690.172801] vb2:     setup: 1 start_streaming: 1 stop_streaming: 1
[26690.172809] vb2:     wait_prepare: 10668 wait_finish: 10669
[26690.172731] BUG: unable to handle kernel NULL pointer dereference at           (null)
[26690.185853] IP: [<ffffffffa055061c>] cx23885_buf_prepare+0x6c/0xd0 [cx23885]
[26690.188518] PGD 77a77067 PUD 78da3067 PMD 0 
[26690.191153] Oops: 0000 [#2] SMP 
[26690.193753] Modules linked in: xt_multiport ipt_MASQUERADE iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT xt_CHECKSUM iptable_mangle xt_tcpudp bridge stp llc ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables dm_crypt si2157(OX) si2168(OX) m88ts2022(OX) m88ds3103(OX) i2c_mux rc_it913x_v1(OX) it913x(OX) af9033(OX) cx25840(OX) kvm_amd kvm dm_multipath scsi_dh cx23885(OX) altera_ci(OX) tda18271(OX) altera_stapl(OX) videobuf2_dvb(OX) amd64_edac_mod tveeprom(OX) cx2341x(OX) dvb_usb_af9035(OX) videobuf2_dma_sg(OX) k10temp edac_core dvb_usb_v2(OX) edac_mce_amd dvb_core(OX) rc_core(OX) videobuf2_memops(OX) videobuf2_core(OX) sp5100_tco i2c_piix4 v4l2_common(OX) videodev(OX) media(OX) snd_pcm snd_page_alloc nfsd snd_timer auth_rpcgss nfs_acl mac_hid snd nfs soundcore lockd parport_pc ppdev sunrpc lp parport shpchp msr fscache raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq raid0 multipath linear raid1 radeon i2c_algo_bit ttm drm_kms_helper tg3 drm usb_storage ptp pps_core ahci libahci
[26690.218564] CPU: 1 PID: 18789 Comm: vb2-cx23885[0] Tainted: G    B D    OX 3.13.0-40-generic #69-Ubuntu
[26690.221221] Hardware name: HP ProLiant MicroServer, BIOS O41     07/29/2011
[26690.223826] task: ffff880032253000 ti: ffff880078c92000 task.ti: ffff880078c92000
[26690.226505] RIP: 0010:[<ffffffffa055061c>]  [<ffffffffa055061c>] cx23885_buf_prepare+0x6c/0xd0 [cx23885]
[26690.229153] RSP: 0018:ffff880078c93dd0  EFLAGS: 00010246
[26690.232032] RAX: 0000000000005e00 RBX: ffff880075f85570 RCX: 00000000000002f0
[26690.234918] RDX: 0000000000005e00 RSI: ffff880077b00fb8 RDI: ffff88007a28a000
[26690.237514] RBP: ffff880078c93df8 R08: 0000000000000020 R09: 0000000000000000
[26690.240382] R10: ffff880076285828 R11: ffff880076285828 R12: ffff880077b00c00
[26690.242994] R13: 0000000000005e00 R14: ffff880075f84000 R15: 0000000000000000
[26690.245628] FS:  00007f20fe8187c0(0000) GS:ffff88007dc80000(0000) knlGS:0000000000000000
[26690.248558] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[26690.251483] CR2: 0000000000000000 CR3: 0000000077a6b000 CR4: 00000000000007e0
[26690.254160] Stack:
[26690.257087]  ffff880077b00c00 ffff880077024458 ffff880077b00c00 0000000000000000
[26690.260132]  ffff880076285828 ffff880078c93e08 ffffffffa0551ca9 ffff880078c93e38
[26690.263177]  ffffffffa04957de 0000000000005e00 ffff880076285828 ffff880077024458
[26690.266263] Call Trace:
[26690.269283]  [<ffffffffa0551ca9>] buffer_prepare+0x19/0x20 [cx23885]
[26690.272049]  [<ffffffffa04957de>] __buf_prepare+0x27e/0x390 [videobuf2_core]
[26690.275103]  [<ffffffffa0496fdb>] vb2_internal_qbuf+0x6b/0x220 [videobuf2_core]
[26690.277913]  [<ffffffffa049729e>] vb2_thread+0x10e/0x480 [videobuf2_core]
[26690.280682]  [<ffffffffa0497190>] ? vb2_internal_qbuf+0x220/0x220 [videobuf2_core]
[26690.283451]  [<ffffffff8108b562>] kthread+0xd2/0xf0
[26690.286485]  [<ffffffff8108b490>] ? kthread_create_on_node+0x1c0/0x1c0
[26690.289537]  [<ffffffff8172fc7c>] ret_from_fork+0x7c/0xb0
[26690.292619]  [<ffffffff8108b490>] ? kthread_create_on_node+0x1c0/0x1c0
[26690.295383] Code: 24 60 02 00 00 85 c0 75 3e 45 85 ed 75 4d 90 8b 8b f0 00 00 00 49 8b be 20 01 00 00 49 8d b4 24 b8 03 00 00 44 8b 83 f4 00 00 00 <49> 8b 17 45 31 c9 e8 19 f1 ff ff 31 c0 5b 41 5c 41 5d 41 5e 41 
[26690.301677] RIP  [<ffffffffa055061c>] cx23885_buf_prepare+0x6c/0xd0 [cx23885]
[26690.304665]  RSP <ffff880078c93dd0>
[26690.307847] CR2: 0000000000000000
[26690.317658] ---[ end trace e65c87e31c08e6a8 ]---