The following are 3 samples of kernel messages that I am getting on a fairly regular basis, which seem to have started occurring since the cx23885 vb2 conversion. I am using the https://github.com/ljalves/linux_media tree from 16 Jan 2015 I have a TBS6985 and a TBS6981 card present in the machine. The TBS6985 is working fine. The kernel messages are triggered by VDR's idle scanning which it done using the TBS6981. [16795.690383] BUG: Bad page state in process vb2-cx23885[0] pfn:36bd1 [16795.690387] page:ffffea0000daf440 count:-1 mapcount:0 mapping: (null) index:0x0 [16795.690389] flags: 0x1ffff0000000000() [16795.690390] page dumped because: nonzero _count [16795.690391] Modules linked in: rfcomm bluetooth iptable_mangle xt_DSCP ip_tables x_tables ir_jvc_decoder(OE) ir_lirc_codec(OE) lirc_dev(OE) ir_xmp_decoder(OE) ir_sony_decoder(OE) ir_sanyo_decoder(OE) ir_sharp_decoder(OE) ir_rc6_decoder(OE) ir_rc5_decoder(OE) ir_nec_decoder(OE) ir_mce_kbd_decoder(OE) rc_tbs_nec(OE) cx25840(OE) binfmt_misc rc_dib0700_rc5(OE) dib7000p(OE) cx23885(OE) altera_ci(OE) tda18271(OE) altera_stapl(OE) snd_hda_codec_hdmi videobuf2_dvb(OE) tveeprom(OE) snd_hda_codec_realtek av201x(OE) intel_rapl cx2341x(OE) x86_pkg_temp_thermal intel_powerclamp videobuf2_dma_sg(OE) videobuf2_memops(OE) coretemp videobuf2_core(OE) kvm snd_hda_codec_generic v4l2_common(OE) snd_hda_intel snd_hda_controller snd_hda_codec videodev(OE) crct10dif_pclmul crc32_pclmul saa716x_budget(OE) ghash_clmulni_intel snd_hwdep media(OE) snd_pcm i915 aesni_intel dvb_usb_dib0700(OE) tas2101(OE) aes_x86_64 dib9000(OE) dib7000m(OE) dib0090(OE) dib0070(OE) [16795.690421] vb2: counters for queue ffff880227c55828: UNBALANCED! [16795.690422] cxd2820r(OE) dib3000mc(OE) lrw video [16795.690425] vb2: setup: 1 start_streaming: 1 stop_streaming: 1 [16795.690426] vb2: wait_prepare: 10464 wait_finish: 10465 [16795.690427] vb2: counters for queue ffff880227c55828, buffer 31: UNBALANCED! [16795.690429] vb2: buf_init: 1 buf_cleanup: 1 buf_prepare: 109 buf_finish: 110 [16795.690429] vb2: buf_queue: 109 buf_done: 109 [16795.690430] vb2: alloc: 1 put: 1 prepare: 109 finish: 109 mmap: 0 [16795.690431] vb2: get_userptr: 0 put_userptr: 0 [16795.690432] vb2: attach_dmabuf: 0 detach_dmabuf: 0 map_dmabuf: 0 unmap_dmabuf: 0 [16795.690433] vb2: get_dmabuf: 0 num_users: 0 vaddr: 110 cookie: 110 [16795.690434] gpio_ich drm_kms_helper snd_seq_midi snd_seq_midi_event snd_rawmidi gf128mul dibx000_common(OE) mb86a16(OE) snd_seq glue_helper snd_seq_device lp cx24117(OE) mei_me snd_timer dvb_usb(OE) drm ablk_helper rc_core(OE) parport saa716x_core(OE) lpc_ich snd mei dvb_core(OE) soundcore i2c_algo_bit i2c_mux serio_raw cryptd mac_hid psmouse ahci r8169 libahci mii [16795.690452] CPU: 1 PID: 16771 Comm: vb2-cx23885[0] Tainted: G OE 3.18.1-ickle75+ #1 [16795.690453] Hardware name: Shuttle SH67H3/FH67, BIOS 4.6.4 03/22/2011 [16795.690454] ffffffff81aad259 ffff880231493a48 ffffffff817781fd 0000000000000000 [16795.690456] ffffea0000daf440 ffff880231493a78 ffffffff81774bcc ffffea0000daf440 [16795.690458] 0000000000000141 0000000000000200 ffff88023fdf4780 ffff880231493b68 [16795.690459] Call Trace: [16795.690465] [] dump_stack+0x46/0x58 [16795.690468] [] bad_page.part.50+0xe0/0xfe [16795.690471] [] get_page_from_freelist+0x873/0x9e0 [16795.690474] [] ? select_idle_sibling+0x2b/0x120 [16795.690498] [] __alloc_pages_nodemask+0x15f/0xa50 [16795.690501] [] ? try_to_wake_up+0x1e4/0x330 [16795.690505] [] dma_generic_alloc_coherent+0xa4/0x160 [16795.690508] [] x86_swiotlb_alloc_coherent+0x21/0x50 [16795.690513] [] cx23885_risc_databuffer+0xb2/0x170 [cx23885] [16795.690519] [] ? dvb_dmx_swfilter_section_copy_dump+0x1f1/0x250 [dvb_core] [16795.690522] [] cx23885_buf_prepare+0x7f/0xd0 [cx23885] [16795.690526] [] buffer_prepare+0x19/0x20 [cx23885] [16795.690529] [] __buf_prepare+0x27e/0x390 [videobuf2_core] [16795.690532] [] vb2_internal_qbuf+0x7b/0x240 [videobuf2_core] [16795.690535] [] vb2_thread+0x10e/0x480 [videobuf2_core] [16795.690538] [] ? vb2_internal_qbuf+0x240/0x240 [videobuf2_core] [16795.690540] [] kthread+0xd2/0xf0 [16795.690542] [] ? kthread_create_on_node+0x180/0x180 [16795.690545] [] ret_from_fork+0x7c/0xb0 [16795.690547] [] ? kthread_create_on_node+0x180/0x180 [16795.690548] Disabling lock debugging due to kernel taint [129577.894551] BUG: unable to handle kernel NULL pointer dereference at 0000000000000058 [129577.896227] IP: [] vb2_thread+0x17a/0x480 [videobuf2_core] [129577.897858] PGD 0 [129577.899451] Oops: 0002 [#6] SMP [129577.901033] Modules linked in: rfcomm bluetooth iptable_mangle xt_DSCP ip_tables x_tables ir_jvc_decoder(OE) ir_lirc_codec(OE) lirc_dev(OE) ir_x mp_decoder(OE) ir_sony_decoder(OE) ir_sanyo_decoder(OE) ir_sharp_decoder(OE) ir_rc6_decoder(OE) ir_rc5_decoder(OE) ir_nec_decoder(OE) ir_mce_kbd_dec oder(OE) rc_tbs_nec(OE) cx25840(OE) binfmt_misc rc_dib0700_rc5(OE) dib7000p(OE) cx23885(OE) altera_ci(OE) tda18271(OE) altera_stapl(OE) snd_hda_code c_hdmi videobuf2_dvb(OE) tveeprom(OE) snd_hda_codec_realtek av201x(OE) intel_rapl cx2341x(OE) x86_pkg_temp_thermal intel_powerclamp videobuf2_dma_sg (OE) videobuf2_memops(OE) coretemp videobuf2_core(OE) kvm snd_hda_codec_generic v4l2_common(OE) snd_hda_intel snd_hda_controller snd_hda_codec video dev(OE) crct10dif_pclmul crc32_pclmul saa716x_budget(OE) ghash_clmulni_intel snd_hwdep media(OE) snd_pcm i915 aesni_intel dvb_usb_dib0700(OE) tas210 1(OE) aes_x86_64 dib9000(OE) dib7000m(OE) dib0090(OE) dib0070(OE) cxd2820r(OE) dib3000mc(OE) lrw video gpio_ich drm_kms_helper snd_seq_midi snd_seq_ midi_event snd_rawmidi gf128mul dibx000_common(OE) mb86a16(OE) snd_seq glue_helper snd_seq_device lp cx24117(OE) mei_me snd_timer dvb_usb(OE) drm ab lk_helper rc_core(OE) parport saa716x_core(OE) lpc_ich snd mei dvb_core(OE) soundcore i2c_algo_bit i2c_mux serio_raw cryptd mac_hid psmouse ahci r81 69 libahci mii [129577.911617] CPU: 0 PID: 11837 Comm: vb2-cx23885[0] Tainted: G B D OE 3.18.1-ickle75+ #1 [129577.913452] Hardware name: Shuttle SH67H3/FH67, BIOS 4.6.4 03/22/2011 [129577.915308] task: ffff880228249e00 ti: ffff8802310d0000 task.ti: ffff8802310d0000 [129577.917139] RIP: 0010:[] [] vb2_thread+0x17a/0x480 [videobuf2_core] [129577.918983] RSP: 0018:ffff8802310d3e48 EFLAGS: 00010246 [129577.920817] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 000000000000000b [129577.922654] RDX: 0000000000000058 RSI: ffff880228249e00 RDI: 0000000000000058 [129577.924485] RBP: ffff8802310d3eb8 R08: ffff8802310d0000 R09: 0000000000000000 [129577.926316] R10: ffff88021b17beb8 R11: 00000000000003ff R12: 0000000000000058 [129577.928149] R13: ffff8800b130f6c0 R14: 0000000000000000 R15: ffff880227c56028 [129577.929976] FS: 0000000000000000(0000) GS:ffff88023fa00000(0000) knlGS:0000000000000000 [129577.931807] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [129577.933635] CR2: 0000000000000058 CR3: 0000000001c16000 CR4: 00000000000407f0 [129577.935472] Stack: [129577.937296] ffff880228249e00 ffff880228249e00 0000000000000070 0000000000013680 [129577.939144] 0000000000000000 ffff880200000000 0000000000000292 ffff88023353d680 [129577.940935] ffff880227c56028 ffff88023353d680 ffff880227c56028 ffffffffc0462200 [129577.942671] Call Trace: [129577.944392] [] ? vb2_internal_qbuf+0x240/0x240 [videobuf2_core] [129577.946134] [] kthread+0xd2/0xf0 [129577.947862] [] ? kthread_create_on_node+0x180/0x180 [129577.949588] [] ret_from_fork+0x7c/0xb0 [129577.951306] [] ? kthread_create_on_node+0x180/0x180 [129577.953034] Code: 89 e7 ba 58 00 00 00 0f 85 94 01 00 00 40 f6 c7 02 0f 85 72 01 00 00 40 f6 c7 04 0f 85 50 01 00 00 89 d1 31 c0 c1 e9 03 f6 c2 04 48 ab 74 0a c7 07 00 00 00 00 48 83 c7 04 f6 c2 02 74 0a 31 [129577.954898] RIP [] vb2_thread+0x17a/0x480 [videobuf2_core] [129577.956659] RSP [129577.958370] CR2: 0000000000000058 [129577.967313] ---[ end trace 78ca5e4a2591960e ]--- [132180.785645] cx23885[0]: mpeg risc op code error [132180.785653] cx23885[0]: TS2 C - dma channel status dump [132180.785657] cx23885[0]: cmds: init risc lo : 0x3691c000 [132180.785662] cx23885[0]: cmds: init risc hi : 0x00000000 [132180.785665] cx23885[0]: cmds: cdt base : 0x000105e0 [132180.785668] cx23885[0]: cmds: cdt size : 0x0000000a [132180.785671] cx23885[0]: cmds: iq base : 0x00010440 [132180.785674] cx23885[0]: cmds: iq size : 0x00000010 [132180.785684] cx23885[0]: cmds: risc pc lo : 0x3691c020 [132180.785687] cx23885[0]: cmds: risc pc hi : 0x00000000 [132180.785689] cx23885[0]: cmds: iq wr ptr : 0x00004118 [132180.785691] cx23885[0]: cmds: iq rd ptr : 0x00004110 [132180.785693] cx23885[0]: cmds: cdt current : 0x000105f8 [132180.785695] cx23885[0]: cmds: pci target lo : 0x079402f0 [132180.785697] cx23885[0]: cmds: pci target hi : 0x00000000 [132180.785699] cx23885[0]: cmds: line / byte : 0x03810000 [132180.785701] cx23885[0]: risc0: 0x1c0002f0 [ write sol eol count=752 ] [132180.785706] cx23885[0]: risc1: 0x079402f0 [ INVALID eol irq2 irq1 23 20 18 count=752 ] [132180.785711] cx23885[0]: risc2: 0x00000000 [ INVALID count=0 ] [132180.785713] cx23885[0]: risc3: 0x1c0002f0 [ write sol eol count=752 ] [132180.785717] cx23885[0]: (0x00010440) iq 0: 0x137cb002 [ write irq2 irq1 22 21 20 19 18 resync 13 12 count=2 ] [132180.785722] cx23885[0]: iq 1: 0x0000c1f3 [ arg #1 ] [132180.785725] cx23885[0]: iq 2: 0x06f0feff [ arg #2 ] [132180.785727] cx23885[0]: (0x0001044c) iq 3: 0xb480040c [ writerm eol 23 count=1036 ] [132180.785730] cx23885[0]: iq 4: 0xe2026881 [ arg #1 ] [132180.785732] cx23885[0]: iq 5: 0x5210f004 [ arg #2 ] [132180.785734] cx23885[0]: (0x00010458) iq 6: 0x03020401 [ INVALID irq2 irq1 cnt1 count=1025 ] [132180.785738] cx23885[0]: (0x0001045c) iq 7: 0x065f481a [ INVALID eol irq2 22 20 19 18 cnt1 cnt0 14 count=2074 ] [132180.785743] cx23885[0]: (0x00010460) iq 8: 0x00000000 [ INVALID count=0 ] [132180.785746] cx23885[0]: (0x00010464) iq 9: 0x1c0002f0 [ write sol eol count=752 ] [132180.785749] cx23885[0]: iq a: 0x07940bc0 [ arg #1 ] [132180.785751] cx23885[0]: iq b: 0x00000000 [ arg #2 ] [132180.785753] cx23885[0]: (0x00010470) iq c: 0x71000000 [ jump irq1 count=0 ] [132180.785756] cx23885[0]: iq d: 0x1c0002f0 [ arg #1 ] [132180.785759] cx23885[0]: iq e: 0x07940000 [ arg #2 ] [132180.785761] cx23885[0]: (0x0001047c) iq f: 0x00000000 [ INVALID count=0 ] [132180.785762] cx23885[0]: fifo: 0x00006000 -> 0x7000 [132180.785763] cx23885[0]: ctrl: 0x00010440 -> 0x104a0 [132180.785765] cx23885[0]: ptr1_reg: 0x00006310 [132180.785767] cx23885[0]: ptr2_reg: 0x000105f8 [132180.785769] cx23885[0]: cnt1_reg: 0x00000002 [132180.785771] cx23885[0]: cnt2_reg: 0x00000007 00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09) 00:01.0 PCI bridge: Intel Corporation Xeon E3-1200/2nd Generation Core Processor Family PCI Express Root Port (rev 09) 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) 00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller#1 (rev 04) 00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 05) 00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 05) 00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b5) 00:1c.1 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 2 (rev b5) 00:1c.2 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 3 (rev b5) 00:1c.3 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 4 (rev b5) 00:1c.4 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 5 (rev b5) 00:1d.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 05) 00:1f.0 ISA bridge: Intel Corporation H67 Express Chipset Family LPC Controller (rev 05) 00:1f.2 SATA controller: Intel Corporation 6 Series/C200 Series Chipset Family SATA AHCI Controller (rev 05) 00:1f.3 SMBus: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller (rev 05) 01:00.0 Multimedia video controller: Conexant Systems, Inc. CX23885 PCI Video and Audio Decoder (rev 04) 03:00.0 USB controller: ASMedia Technology Inc. ASM1042 SuperSpeed USB Host Controller 04:00.0 USB controller: ASMedia Technology Inc. ASM1042 SuperSpeed USB Host Controller 05:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 06) 06:00.0 Multimedia controller: Philips Semiconductors SAA7160 (rev 02) -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
