On Sun, 2012-01-08 at 17:33 +0100, Rik Theys wrote:
> Source: linux-2.6
> Version: 3.1.6-1
> Severity: normal
>
> Dear Maintainer,
>
> Trying to watch TV using mplayer on a HVR-1300 card results in a BUG in
> videobuf-core.
>
> I'm trying to use the MPEG device of the HVR-1300. I can trigger the bug easily
> with mplayer using the following options in my ~/.mplayer/config:
>
> tv=driver=v4l2:tdevice=/dev/vbi0:chanlist=europe-west:alsa=1:adevice=hw.1,0:audiorate=48000:volume=60:immediatemode=0:norm=PAL-BG:channels=E5-ch1,E6-VTM,E7-EEN,E8-ch4,E9-NED1,E10-ch6,E11-ch7,E12-VT4,SE5-ch9,SE6-RTV,SE7-CNN,SE8-ch12,SE9-ch13,SE10-ch14,SE11-2BE,SE12-ch16,SE13-ch17,SE14-MTV,SE15-ch19,SE16-ch20,SE17-ch21,SE18-CANVAS,SE19-ch23,SE20-ch24,23-ch25,24-ch26,25-ch27,26-ch28,31-ch29,32-ch30,33-ch31,34-ch32,41-ch33,43-ch34,44-ch35,45-ch36,46-ch37,47-ch38,48-ch39,52-ch40,53-ch41,54-ch42:device=/dev/video1
>
> I start mplayer using 'mplayer tv://'.
>
> When using the nvidia driver, this triggers the bug 99% of the time.
>
> I tried using nouveau to prevent kernel taint and this also triggers the bug, but not
> as easily as the nvidia driver.
Perhaps this is due to differences in the speed of operations.
> Jan 8 17:12:52 saturn kernel: [ 1623.655341] ------------[ cut here ]------------
> Jan 8 17:12:52 saturn kernel: [ 1623.655363] kernel BUG at /home/blank/debian/kernel/release/linux-2.6/linux-2.6-3.1.6/debian/build/source_amd64_none/drivers/media/video/videobuf-core.c:300!
The 'BUG' indicates that the video capture queue hasn't been initialised
properly or has been corrupted. However, after looking at the driver
for a while I just can't see how that can happen.
> Jan 8 17:12:52 saturn kernel: [ 1623.655391] invalid opcode: 0000 [#1] SMP
> Jan 8 17:12:52 saturn kernel: [ 1623.655406] CPU 1
> Jan 8 17:12:52 saturn kernel: [ 1623.655412] Modules linked in: ip6_tables ebtable_nat ebtables parport_pc ppdev lp parport rfcomm acpi_cpufreq mperf bnep bluetooth cpufreq_userspace cpufreq_powersave cpufreq_conservative cpufreq_stats fuse nfsd nfs lockd fscache auth_rpcgss nfs_acl sunrpc bridge stp xt_tcpudp nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack iptable_filter ip_tables x_tables dm_crypt loop firewire_sbp2 kvm_intel kvm snd_hda_codec_hdmi cx88_blackbird cx2341x arc4 cx22702 cx88_dvb cx88_vp3054_i2c videobuf_dvb dvb_core wm8775 tuner_simple tuner_types tda9887 tda8290 tuner snd_hda_codec_via cx88_alsa ir_lirc_codec lirc_dev ir_mce_kbd_decoder ir_sony_decoder ir_jvc_decoder ir_rc6_decoder snd_hda_intel rt2500pci rt2x00pci rt2x00lib cx8800 cx8802 snd_hda_codec ir_rc5_decoder cx88xx ir_nec_decoder snd_hwdep rc_core tveeprom snd_pcm v4l2_common videodev nouveau ttm drm_kms_helper drm snd_seq i2c_algo_bit joydev mac80211 cfg80211 snd_timer mxm_wmi wmi rfkill med
> ia videobuf_dma_sg v4l2_compat_ioctl3
> Jan 8 17:12:52 saturn kernel: 2 snd_seq_device psmouse btcx_risc video evdev videobuf_core snd eeprom_93cx6 serio_raw asus_atk0110 i7core_edac edac_core i2c_i801 i2c_core processor thermal_sys soundcore iTCO_wdt iTCO_vendor_support snd_page_alloc button ext4 mbcache jbd2 crc16 btrfs zlib_deflate crc32c libcrc32c dm_mod raid1 raid0 md_mod sd_mod sr_mod crc_t10dif cdrom usb_storage uas usbhid hid xhci_hcd firewire_ohci firewire_core crc_itu_t ahci libahci ehci_hcd libata r8169 mii scsi_mod usbcore [last unloaded: scsi_wait_scan]
> Jan 8 17:12:52 saturn kernel: [ 1623.656025]
> Jan 8 17:12:52 saturn kernel: [ 1623.656033] Pid: 8039, comm: mplayer Not tainted 3.1.0-1-amd64 #1 System manufacturer System Product Name/P7P55D-E
> Jan 8 17:12:52 saturn kernel: [ 1623.656062] RIP: 0010:[<ffffffffa02d94ce>] [<ffffffffa02d94ce>] videobuf_next_field+0x7/0x2b [videobuf_core]
> Jan 8 17:12:52 saturn kernel: [ 1623.656094] RSP: 0018:ffff8801f2a03b60 EFLAGS: 00010246
> Jan 8 17:12:52 saturn kernel: [ 1623.656107] RAX: 0000000000000000 RBX: ffff8801d88c2608 RCX: ffffffffa05a155b
> Jan 8 17:12:52 saturn kernel: [ 1623.656123] RDX: 0000000000000000 RSI: 0000000020070728 RDI: ffff8801d88c2608
> Jan 8 17:12:52 saturn kernel: [ 1623.656138] RBP: ffff880225d0e000 R08: 0000000000000000 R09: 0000000000000000
> Jan 8 17:12:52 saturn kernel: [ 1623.656154] R10: ffff880223f22000 R11: ffff880223f22000 R12: ffff8801f2a03db0
> Jan 8 17:12:52 saturn kernel: [ 1623.656169] R13: ffffffffa05a38a0 R14: ffff8801b40ad680 R15: ffff8801d88c2600
> Jan 8 17:12:52 saturn kernel: [ 1623.656186] FS: 00007f5641bc77c0(0000) GS:ffff88022fc20000(0000) knlGS:0000000000000000
> Jan 8 17:12:52 saturn kernel: [ 1623.656203] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> Jan 8 17:12:52 saturn kernel: [ 1623.656217] CR2: 00007f562769a000 CR3: 00000002057ee000 CR4: 00000000000006e0
> Jan 8 17:12:52 saturn kernel: [ 1623.656232] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> Jan 8 17:12:52 saturn kernel: [ 1623.656248] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> Jan 8 17:12:52 saturn kernel: [ 1623.656264] Process mplayer (pid: 8039, threadinfo ffff8801f2a02000, task ffff88022319efa0)
> Jan 8 17:12:52 saturn kernel: [ 1623.656281] Stack:
> Jan 8 17:12:52 saturn kernel: [ 1623.656288] ffffffffa02d97d3 ffff8801f2a03db0 0000000000000000 ffff880223191000
> Jan 8 17:12:52 saturn kernel: [ 1623.656314] ffffffffa05a38a0 ffff8801b40ad680 ffffffffa046ab55 000000000000001f
> Jan 8 17:12:52 saturn kernel: [ 1623.656340] 0000000000000030 ffff88022fffcc08 0000000000000002 0000000000000000
> Jan 8 17:12:52 saturn kernel: [ 1623.656367] Call Trace:
> Jan 8 17:12:52 saturn kernel: [ 1623.656384] [<ffffffffa02d97d3>] ? videobuf_qbuf+0x2e1/0x3cd [videobuf_core]
> Jan 8 17:12:52 saturn kernel: [ 1623.656409] [<ffffffffa046ab55>] ? __video_do_ioctl+0x1857/0x3cee [videodev]
> Jan 8 17:12:52 saturn kernel: [ 1623.656430] [<ffffffffa05a155b>] ? vidioc_dqbuf+0x18/0x18 [cx88_blackbird]
> Jan 8 17:12:52 saturn kernel: [ 1623.656451] [<ffffffff810b6d89>] ? __alloc_pages_nodemask+0x6e0/0x748
> Jan 8 17:12:52 saturn kernel: [ 1623.656470] [<ffffffff8103539b>] ? should_resched+0x5/0x23
> Jan 8 17:12:52 saturn kernel: [ 1623.656487] [<ffffffff810f0961>] ? lookup_page_cgroup+0x2d/0x42
> Jan 8 17:12:52 saturn kernel: [ 1623.656504] [<ffffffff810ec570>] ? mem_cgroup_update_page_stat+0x17/0xd4
> Jan 8 17:12:52 saturn kernel: [ 1623.656521] [<ffffffff8103539b>] ? should_resched+0x5/0x23
> Jan 8 17:12:52 saturn kernel: [ 1623.656536] [<ffffffff810ee6ab>] ? mem_cgroup_get_reclaim_stat_from_page+0xd/0x52
> Jan 8 17:12:52 saturn kernel: [ 1623.656554] [<ffffffff810b8b74>] ? update_page_reclaim_stat+0x17/0x44
> Jan 8 17:12:52 saturn kernel: [ 1623.656576] [<ffffffffa0469009>] ? video_usercopy+0x2e8/0x3a6 [videodev]
> Jan 8 17:12:52 saturn kernel: [ 1623.656599] [<ffffffffa04692fe>] ? v4l_print_ext_ctrls.part.3+0xac/0xac [videodev]
> Jan 8 17:12:52 saturn kernel: [ 1623.656620] [<ffffffff810c308d>] ? vma_prio_tree_insert+0x1d/0x35
> Jan 8 17:12:52 saturn kernel: [ 1623.656641] [<ffffffffa04682d9>] ? v4l2_ioctl+0xe0/0x10e [videodev]
> Jan 8 17:12:52 saturn kernel: [ 1623.656658] [<ffffffff81100fc0>] ? do_vfs_ioctl+0x452/0x493
> Jan 8 17:12:52 saturn kernel: [ 1623.656673] [<ffffffff8103539b>] ? should_resched+0x5/0x23
> Jan 8 17:12:52 saturn kernel: [ 1623.656688] [<ffffffff8110104c>] ? sys_ioctl+0x4b/0x6f
> Jan 8 17:12:52 saturn kernel: [ 1623.656704] [<ffffffff813327d2>] ? system_call_fastpath+0x16/0x1b
> Jan 8 17:12:52 saturn kernel: [ 1623.656717] Code: a0 7e 10 eb d6 48 8d bb 70 01 00 00 31 ed e8 6c fe ff ff 48 89 df e8 67 fb ff ff 48 83 c4 18 89 e8 5b 5d c3 8b 47 5c 85 c0 75 02 <0f> 0b 83 f8 07 75 1c 83 7f 60 02 75 0a c7 47 60 03 00 00 00 b0
> Jan 8 17:12:52 saturn kernel: [ 1623.656904] RIP [<ffffffffa02d94ce>] videobuf_next_field+0x7/0x2b [videobuf_core]
> Jan 8 17:12:52 saturn kernel: [ 1623.656928] RSP <ffff8801f2a03b60>
> Jan 8 17:12:52 saturn kernel: [ 1623.664167] ---[ end trace 4977f1ea86d5af7d ]---
>
>
> I've experienced this bug with previous kernel versions as well but didn't report it before.
Do you remember which was the first version where this bug appeared?
Ben.
> Here's the dmesg output from a boot of the system:
[removed; see http://bugs.debian.org/655109]
--
Ben Hutchings
Life is what happens to you while you're busy making other plans.
- John Lennon
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