Le mercredi 13 décembre 2017 à 22:33 +0100, Oleksandr Ostrenko a écrit : > Dear all, > > There is an issue in v4l_enum_fmt leading to kernel panic under > certain > circumstance. It happens while I try to capture video from my TV > tuner. > > When I connect this USB TV tuner (WinTV HVR-1900) it gets recognized > just fine. However, whenever I try to capture a video from the > device, > it hangs the terminal and I end up with a lot of "Unknown > pixelformat > 0x00000000" errors from v4l_enum_fmt in dmesg that eventually lead > to > kernel panic on a machine with Linux Mint. On another machine with > openSUSE it does not hang but just keeps producing the error message > below until I stop the video acquisition. I have already tried > several > kernel versions (4.4, 4.8, 4.14) and two different distributions > (Mint, > openSUSE) but to no avail. > > Can somebody give me a hint on debugging this issue? > Below are sample outputs of lsusb and dmesg. > > Thanks, > Oleksandr > > lsusb > > Bus 001 Device 002: ID 8087:8001 Intel Corp. > Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub > Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub > Bus 002 Device 002: ID 8087:0a2a Intel Corp. > Bus 002 Device 005: ID 2040:7300 Hauppauge > Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub > > Relevant dmesg > > [ 515.920080] usb 2-3: new high-speed USB device number 4 using > xhci_hcd > [ 516.072041] usb 2-3: New USB device found, idVendor=2040, > idProduct=7300 > [ 516.072045] usb 2-3: New USB device strings: Mfr=1, Product=2, > SerialNumber=3 > [ 516.072047] usb 2-3: Product: WinTV > [ 516.072049] usb 2-3: Manufacturer: Hauppauge > [ 516.072051] usb 2-3: SerialNumber: 7300-00-F04BADA0 > [ 516.072474] pvrusb2: Hardware description: WinTV HVR-1900 Model > 73xxx > [ 517.089290] pvrusb2: Device microcontroller firmware (re)loaded; > it > should now reset and reconnect. > [ 517.121228] usb 2-3: USB disconnect, device number 4 > [ 517.121436] pvrusb2: Device being rendered inoperable > [ 518.908091] usb 2-3: new high-speed USB device number 5 using > xhci_hcd > [ 519.065592] usb 2-3: New USB device found, idVendor=2040, > idProduct=7300 > [ 519.065597] usb 2-3: New USB device strings: Mfr=1, Product=2, > SerialNumber=3 > [ 519.065600] usb 2-3: Product: WinTV > [ 519.065602] usb 2-3: Manufacturer: Hauppauge > [ 519.065605] usb 2-3: SerialNumber: 7300-00-F04BADA0 > [ 519.066862] pvrusb2: Hardware description: WinTV HVR-1900 Model > 73xxx > [ 519.098815] pvrusb2: Binding ir_rx_z8f0811_haup to i2c address > 0x71. > [ 519.098872] pvrusb2: Binding ir_tx_z8f0811_haup to i2c address > 0x70. > [ 519.131651] cx25840 6-0044: cx25843-24 found @ 0x88 (pvrusb2_a) > [ 519.133234] lirc_dev: IR Remote Control driver registered, major > 241 > [ 519.134192] lirc_zilog: module is from the staging directory, the > quality is unknown, you have been warned. > [ 519.134194] lirc_zilog: module is from the staging directory, the > quality is unknown, you have been warned. > [ 519.134564] Zilog/Hauppauge IR driver initializing > [ 519.135628] probing IR Rx on pvrusb2_a (i2c-6) > [ 519.135674] probe of IR Rx on pvrusb2_a (i2c-6) done. Waiting on > IR Tx. > [ 519.135678] i2c i2c-6: probe of IR Rx on pvrusb2_a (i2c-6) done > [ 519.135706] probing IR Tx on pvrusb2_a (i2c-6) > [ 519.135728] i2c i2c-6: Direct firmware load for haup-ir- > blaster.bin > failed with error -2 > [ 519.135730] i2c i2c-6: firmware haup-ir-blaster.bin not available > (-2) > [ 519.135799] i2c i2c-6: lirc_dev: driver lirc_zilog registered at > minor = 0 > [ 519.135800] i2c i2c-6: IR unit on pvrusb2_a (i2c-6) registered as > lirc0 and ready > [ 519.135802] i2c i2c-6: probe of IR Tx on pvrusb2_a (i2c-6) done > [ 519.135826] initialization complete > [ 519.140759] pvrusb2: Attached sub-driver cx25840 > [ 519.147644] tuner: 6-0042: Tuner -1 found with type(s) Radio TV. > [ 519.147667] pvrusb2: Attached sub-driver tuner > [ 521.029446] cx25840 6-0044: loaded v4l-cx25840.fw firmware (14264 > bytes) > [ 521.124582] tveeprom: Hauppauge model 73219, rev D1E9, serial# > 4031491488 > [ 521.124586] tveeprom: MAC address is 00:0d:fe:4b:ad:a0 > [ 521.124588] tveeprom: tuner model is Philips 18271_8295 (idx 149, > type 54) > [ 521.124591] tveeprom: TV standards PAL(B/G) PAL(I) SECAM(L/L') > PAL(D/D1/K) ATSC/DVB Digital (eeprom 0xf4) > [ 521.124593] tveeprom: audio processor is CX25843 (idx 37) > [ 521.124594] tveeprom: decoder processor is CX25843 (idx 30) > [ 521.124596] tveeprom: has radio, has IR receiver, has IR > transmitter > [ 521.124606] pvrusb2: Supported video standard(s) reported > available > in hardware: PAL-B/B1/D/D1/G/H/I/K;SECAM-B/D/G/H/K/K > [ 521.124617] pvrusb2: Device initialization completed successfully. > [ 521.124811] pvrusb2: registered device video0 [mpeg] > [ 521.124819] dvbdev: DVB: registering new adapter (pvrusb2-dvb) > [ 523.039178] cx25840 6-0044: loaded v4l-cx25840.fw firmware (14264 > bytes) > [ 523.160593] tda829x 6-0042: setting tuner address to 60 > [ 523.217717] tda18271 6-0060: creating new instance > [ 523.260592] tda18271: TDA18271HD/C1 detected @ 6-0060 > [ 523.768592] tda829x 6-0042: type set to tda8295+18271 > [ 533.360586] cx25840 6-0044: 0x0000 is not a valid video input! > [ 533.416296] usb 2-3: DVB: registering adapter 0 frontend 0 (NXP > TDA10048HN DVB-T)... > [ 533.417571] tda829x 6-0042: type set to tda8295 > [ 533.455567] tda18271 6-0060: attaching existing instance > [ 591.458582] cx25840 6-0044: loaded v4l-cx25840.fw firmware (14264 > bytes) > [ 595.551320] Unknown pixelformat 0x00000000 > [ 595.551344] ------------[ cut here ]------------ > [ 595.551363] WARNING: CPU: 2 PID: 5820 at This is not a kernel panic, but a warning. In recent code it's this one: https://elixir.free-electrons.com/linux/latest/source/drivers/media/v4l2-core/v4l2-ioctl.c#L1288 Though, it is usually a driver issue. More information will be needed. > ../drivers/media/v4l2-core/v4l2-ioctl.c:1288 > v4l_enum_fmt+0xcf6/0x13a0 > [videodev] > [ 595.551365] Modules linked in: tda10048 tda18271 tda8290 tuner > lirc_zilog(C) lirc_dev rc_core cx25840 pvrusb2 tveeprom cx2341x > dvb_core > v4l2_common videodev nf_log_ipv6 xt_comment nf_log_ipv4 > nf_log_common > xt_LOG xt_limit af_packet iscsi_ibft iscsi_boot_sysfs ip6t_REJECT > nf_reject_ipv6 nf_conntrack_ipv6 nf_defrag_ipv6 ipt_REJECT > nf_reject_ipv4 xt_pkttype xt_tcpudp iptable_filter ip6table_mangle > nf_conntrack_netbios_ns nf_conntrack_broadcast nf_conntrack_ipv4 > nf_defrag_ipv4 ip_tables xt_conntrack nf_conntrack ip6table_filter > ip6_tables x_tables snd_hda_codec_hdmi snd_hda_codec_realtek > snd_hda_codec_generic arc4 intel_rapl xfs x86_pkg_temp_thermal > intel_powerclamp coretemp kvm_intel kvm libcrc32c irqbypass > crct10dif_pclmul crc32_pclmul ghash_clmulni_intel pcbc raid1 iwlmvm > intel_spi_platform intel_spi > [ 595.551436] spi_nor mtd iTCO_wdt mac80211 iTCO_vendor_support > snd_hda_intel snd_hda_codec snd_soc_rt5640 snd_hda_core snd_hwdep > snd_soc_rl6231 snd_soc_core md_mod snd_compress btusb > snd_pcm_dmaengine > iwlwifi btrtl btbcm snd_pcm btintel bluetooth aesni_intel > ecdh_generic > snd_timer battery cfg80211 aes_x86_64 snd pcspkr crypto_simd > glue_helper > rfkill cryptd i915 e1000e i2c_i801 lpc_ich ptp pps_core thermal > mei_me > drm_kms_helper fan mei drm fb_sys_fops syscopyarea sysfillrect > sysimgblt > i2c_algo_bit shpchp elan_i2c soundcore tpm_tis video tpm_tis_core > snd_soc_sst_acpi tpm snd_soc_sst_match gpio_lynxpoint dw_dmac > spi_pxa2xx_platform acpi_pad acpi_als kfifo_buf button industrialio > btrfs xor zstd_decompress zstd_compress xxhash raid6_pq crc32c_intel > nvme xhci_pci ehci_pci ehci_hcd xhci_hcd nvme_core usbcore > [ 595.551523] sdhci_acpi sdhci mmc_core i2c_hid sg > [ 595.551533] CPU: 2 PID: 5820 Comm: motv Tainted: G C > 4.14.2-3.gb5596a5-default #1 > [ 595.551535] Hardware name: /NUC5i5RYB, BIOS > RYBDWi35.86A.0367.2017.0929.1059 09/29/2017 > [ 595.551538] task: ffff979f823f8140 task.stack: ffffbde8826e4000 > [ 595.551550] RIP: 0010:v4l_enum_fmt+0xcf6/0x13a0 [videodev] > [ 595.551552] RSP: 0018:ffffbde8826e7ca8 EFLAGS: 00010296 > [ 595.551556] RAX: 000000000000001e RBX: ffffbde8826e7d98 RCX: > 0000000000000000 > [ 595.551558] RDX: ffff979f96d16440 RSI: ffff979f96d0e2d8 RDI: > ffff979f96d0e2d8 > [ 595.551560] RBP: 0000000000000000 R08: 0000000000000001 R09: > 0000000000000322 > [ 595.551562] R10: ffff979f8507ab00 R11: 0000000000000000 R12: > ffff979f85a5a300 > [ 595.551564] R13: ffffffffc12a1cc0 R14: ffff979f8507ab00 R15: > ffff979f85a5a300 > [ 595.551567] FS: 00007ff613fb9780(0000) GS:ffff979f96d00000(0000) > knlGS:0000000000000000 > [ 595.551569] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 595.551571] CR2: 00007ff60a198290 CR3: 000000041b3e6004 CR4: > 00000000003606e0 > [ 595.551574] Call Trace: > [ 595.551590] __video_do_ioctl+0x310/0x320 [videodev] > [ 595.551602] ? video_usercopy+0x1ec/0x600 [videodev] > [ 595.551612] video_usercopy+0x174/0x600 [videodev] > [ 595.551623] ? v4l_enum_fmt+0x13a0/0x13a0 [videodev] > [ 595.551632] ? v4l_enum_fmt+0x13a0/0x13a0 [videodev] > [ 595.551647] pvr2_v4l2_ioctl+0x83/0x100 [pvrusb2] > [ 595.551658] v4l2_ioctl+0xa9/0xd0 [videodev] > [ 595.551665] do_vfs_ioctl+0x8d/0x5d0 > [ 595.551670] ? __fput+0x15b/0x1d0 > [ 595.551676] ? mntput_no_expire+0x11/0x1a0 > [ 595.551680] SyS_ioctl+0x74/0x80 > [ 595.551686] entry_SYSCALL_64_fastpath+0x1e/0xa9 > [ 595.551690] RIP: 0033:0x7ff610862659 > [ 595.551691] RSP: 002b:00007ffe84b2a078 EFLAGS: 00000246 ORIG_RAX: > 0000000000000010 > [ 595.551695] RAX: ffffffffffffffda RBX: 000000000192ee20 RCX: > 00007ff610862659 > [ 595.551697] RDX: 00007ffe84b2a110 RSI: 00000000c0405602 RDI: > 0000000000000004 > [ 595.551699] RBP: 00007ffe84b29f80 R08: 0000000000000000 R09: > 0000000000000004 > [ 595.551701] R10: 00007ff60c6c9620 R11: 0000000000000246 R12: > 000000000192ee20 > [ 595.551703] R13: 0000000000000049 R14: 00007ff613fec000 R15: > 0000000000000000 > [ 595.551706] Code: 3d 4f 35 31 31 0f 84 bf 05 00 00 3d 4d 54 32 31 > 48 > c7 c6 59 17 22 c1 0f 84 e5 f5 ff ff 89 c6 48 c7 c7 77 23 22 c1 e8 15 > c2 > ec c1 <0f> ff 80 7b 0c 00 0f 85 73 f3 ff ff 8b 43 2c 48 c7 c1 1e 17 > 22 > [ 595.551775] ---[ end trace d1089f1c30e702b9 ]---
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