Chris, I would agree that is the best idea as of now. In addition, just curious why don't you just git bisect this as this may be easier then waiting. Nick On 2014-12-29 02:47 PM, Chris Lee wrote:
I'm running 3.19.0-rc1
This started on the Prof 7301 in the 3.18 kernel when vb2 was implemented in the cx88 driver, previously vb2 wasn't used.
I do a lot of work in the dvb side of the media kernels but have never done any work on the vb2 side of things and don't really feel comfortable messing around in there. I'll stick to what I know.
Ive reported it in the V4L media mailing list, we'll see if it gets any attention there.
Chris Lee
On Mon, Dec 29, 2014 at 12:11 PM, nick <xerofoify@gmail.com> wrote:
Chris, Please try the latest rc kernel to see if the issue is fixed. Regards Nick
On 2014-12-29 09:47 AM, Chris Lee wrote:
Im seeing the same issue and others using the Prof 7301, different drivers, same vb2 usage though. Its defn a vb2 issue across multiple devices :(
Chris Lee
On Mon, Dec 29, 2014 at 7:47 AM, Chris Lee <updatelee@gmail.com> wrote:
Im seeing the same issue and others using the Prof 7301, different drivers, same vb2 usage though. Its defn a vb2 issue across multiple devices :(
Chris Lee
On Mon, Dec 29, 2014 at 7:38 AM, Jurgen Kramer <gtmkramer@xs4all.nl> wrote:
On Sat, 2014-12-27 at 10:35 +0100, Jurgen Kramer wrote:
I am seeing kernel oopses using recent media_builds on kernel 3.17:
[ 506.969697] BUG: unable to handle kernel NULL pointer dereference at 0000000000000058 [ 506.969720] IP: [<ffffffffa03a233a>] vb2_thread+0x17a/0x480 [videobuf2_core] [ 506.969739] PGD 0 [ 506.969746] Oops: 0002 [#1] SMP [ 506.969754] Modules linked in: nf_conntrack_netbios_ns nf_conntrack_broadcast cfg80211 rfkill ip6t_rpfilter ip6t_REJECT xt_conntrack ebtable_nat ebtable_broute bridge stp llc ebtable_filter ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw sp2(OE) si2157(OE) si2168(OE) i2c_mux nouveau cx25840(OE) cx23885(OE) altera_ci(OE) tda18271(OE) altera_stapl(OE) videobuf2_dvb(OE) videobuf2_core(OE) videobuf2_dma_sg(OE) videobuf2_memops(OE) snd_seq snd_seq_device snd_pcm snd_timer snd video i2c_algo_bit ttm drm_kms_helper soundcore iTCO_wdt ppdev gpio_ich iTCO_vendor_support tveeprom(OE) cx2341x(OE) [ 506.969871] coretemp dvb_core(OE) v4l2_common(OE) videodev(OE) media(OE) kvm crc32c_intel raid456 async_raid6_recov async_memcpy async_pq async_xor drm xor async_tx raid6_pq microcode serio_raw shpchp i7core_edac edac_core i2c_i801 lpc_ich mfd_core parport_pc parport ite_cir(OE) rc_core(OE) tpm_infineon tpm_tis tpm acpi_cpufreq nfsd auth_rpcgss nfs_acl lockd sunrpc mxm_wmi asix usbnet r8169 mii wmi [ 506.969970] CPU: 0 PID: 3160 Comm: vb2-cx23885[0] Tainted: G OE 3.17.4-200.fc20.x86_64 #1 [ 506.969982] Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./P55 Extreme, BIOS P2.70 08/20/2010 [ 506.969993] task: ffff8800bc18e220 ti: ffff88020d36c000 task.ti: ffff88020d36c000 [ 506.970002] RIP: 0010:[<ffffffffa03a233a>] [<ffffffffa03a233a>] vb2_thread+0x17a/0x480 [videobuf2_core] [ 506.970021] RSP: 0018:ffff88020d36fe68 EFLAGS: 00010246 [ 506.970663] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 000000000000000b [ 506.971305] RDX: 0000000000000058 RSI: ffff8800bc18e220 RDI: 0000000000000058 [ 506.971952] RBP: ffff88020d36fec0 R08: ffff88020d36c000 R09: 000000000000158f [ 506.972611] R10: 00000000000030de R11: 0000000000000010 R12: 0000000000000058 [ 506.973275] R13: ffff8800b81814a0 R14: 0000000000000000 R15: ffff880225c61028 [ 506.973947] FS: 0000000000000000(0000) GS:ffff880233c00000(0000) knlGS:0000000000000000 [ 506.974634] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 506.975321] CR2: 0000000000000058 CR3: 0000000001c14000 CR4: 00000000000007f0 [ 506.976021] Stack: [ 506.976723] ffff8800bc18e220 0000000000000070 00ffffff81c1b460 0000000000000000 [ 506.977442] ffff880200000000 ffff880225c61028 ffff88020d1d8480 ffff880225c61028 [ 506.978165] ffffffffa03a21c0 0000000000000000 0000000000000000 ffff88020d36ff48 [ 506.979055] Call Trace: [ 506.979795] [<ffffffffa03a21c0>] ? vb2_internal_qbuf+0x210/0x210 [videobuf2_core] [ 506.980545] [<ffffffff810b0498>] kthread+0xd8/0xf0 [ 506.981293] [<ffffffff810b03c0>] ? kthread_create_on_node +0x190/0x190 [ 506.982045] [<ffffffff8172e33c>] ret_from_fork+0x7c/0xb0 [ 506.982806] [<ffffffff810b03c0>] ? kthread_create_on_node +0x190/0x190 [ 506.983568] 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 <f3> 48 ab 74 0a c7 07 00 00 00 00 48 83 c7 04 f6 c2 02 74 0a 31 [ 506.984464] RIP [<ffffffffa03a233a>] vb2_thread+0x17a/0x480 [videobuf2_core] [ 506.985306] RSP <ffff88020d36fe68> [ 506.986147] CR2: 0000000000000058 [ 506.990986] ---[ end trace 1973fbcab83c3353 ]---
First I thought is was related to CAM initialization but after removing the CAMS and doing a fresh cold start I am still seeing the oopses. After the oops everything is still functioning. I am using 3x DVBSKY T980C. How can I debug this further?
The problem persist while my system went through a motherboard/mem/cpu upgrade. The oops occurs when one of the DVB-C cards get its first use (in my case mythtv):
[ 102.050294] si2157 18-0060: downloading firmware from file 'dvb-tuner-si2158-a20-01.fw' [ 181.460968] BUG: unable to handle kernel NULL pointer dereference at 0000000000000058 [ 181.460991] IP: [<ffffffffa04d833a>] vb2_thread+0x17a/0x480 [videobuf2_core] [ 181.461019] PGD 0 [ 181.461024] Oops: 0002 [#1] SMP [ 181.461032] Modules linked in: nf_conntrack_netbios_ns nf_conntrack_broadcast ip6t_rpfilter cfg80211 rfkill ip6t_REJECT xt_conntrack ebtable_nat ebtable_broute bridge stp llc ebtable_filter ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw sp2(OE) si2157(OE) si2168(OE) i2c_mux cx25840(OE) cx23885(OE) altera_ci(OE) tda18271(OE) altera_stapl(OE) videobuf2_dvb(OE) videobuf2_core(OE) videobuf2_dma_sg(OE) videobuf2_memops(OE) snd_seq snd_seq_device x86_pkg_temp_thermal snd_pcm snd_timer coretemp snd soundcore tveeprom(OE) kvm_intel kvm cx2341x(OE) dvb_core(OE) rc_core(OE) v4l2_common(OE) videodev(OE) [ 181.461264] crct10dif_pclmul raid456 crc32_pclmul async_raid6_recov async_memcpy crc32c_intel media(OE) async_pq async_xor ghash_clmulni_intel xor async_tx microcode i915 i2c_algo_bit drm_kms_helper drm shpchp e1000e raid6_pq i2c_i801 ptp pps_core mei_me serio_raw mei i2c_hid sdhci_acpi sdhci tpm_tis mmc_core dw_dmac i2c_designware_platform dw_dmac_core i2c_designware_core tpm acpi_pad nfsd auth_rpcgss nfs_acl lockd sunrpc mxm_wmi wmi video [ 181.461374] CPU: 7 PID: 2279 Comm: vb2-cx23885[0] Tainted: G OE 3.17.7-200.fc20.x86_64 #1 [ 181.461393] Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z97 Extreme4, BIOS P1.50 12/17/2014 [ 181.461413] task: ffff8803f5f3f5c0 ti: ffff8800367a4000 task.ti: ffff8800367a4000 [ 181.461429] RIP: 0010:[<ffffffffa04d833a>] [<ffffffffa04d833a>] vb2_thread+0x17a/0x480 [videobuf2_core] [ 181.461460] RSP: 0018:ffff8800367a7e68 EFLAGS: 00010246 [ 181.461944] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 000000000000000b [ 181.462481] RDX: 0000000000000058 RSI: ffff8803f5f3f5c0 RDI: 0000000000000058 [ 181.462995] RBP: ffff8800367a7ec0 R08: ffff8800367a4000 R09: 0000000000000000 [ 181.463621] R10: 0000000000000004 R11: 0000000000000005 R12: 0000000000000058 [ 181.464151] R13: ffff880036875e80 R14: 0000000000000000 R15: ffff880400999028 [ 181.464660] FS: 0000000000000000(0000) GS:ffff88041fbc0000(0000) knlGS:0000000000000000 [ 181.465272] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 181.465804] CR2: 0000000000000058 CR3: 0000000001c14000 CR4: 00000000001407e0 [ 181.466441] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 181.466990] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 181.467541] Stack: [ 181.468094] ffff8803f5f3f5c0 0000000000000070 00ff880409993ae0 0000000000000000 [ 181.468672] ffff880300000000 ffff880400999028 ffff8803e81c83c0 ffff880400999028 [ 181.469334] ffffffffa04d81c0 0000000000000000 0000000000000000 ffff8800367a7f48 [ 181.469981] Call Trace: [ 181.470668] [<ffffffffa04d81c0>] ? vb2_internal_qbuf+0x210/0x210 [videobuf2_core] [ 181.471292] [<ffffffff810b04a8>] kthread+0xd8/0xf0 [ 181.471987] [<ffffffff810b03d0>] ? kthread_create_on_node +0x190/0x190 [ 181.472690] [<ffffffff8172ebbc>] ret_from_fork+0x7c/0xb0 [ 181.473333] [<ffffffff810b03d0>] ? kthread_create_on_node +0x190/0x190 [ 181.474081] 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 <f3> 48 ab 74 0a c7 07 00 00 00 00 48 83 c7 04 f6 c2 02 74 0a 31 [ 181.475582] RIP [<ffffffffa04d833a>] vb2_thread+0x17a/0x480 [videobuf2_core] [ 181.476271] RSP <ffff8800367a7e68> [ 181.476939] CR2: 0000000000000058 [ 181.479707] ---[ end trace fc6ff9e31c18c55f ]--- [ 183.034654] dvb_ca adapter 0: DVB CAM detected and initialised successfully [ 369.140017] dvb_ca adapter 1: DVB CAM detected and initialised successfully [ 449.206849] dvb_ca adapter 2: DVB CAM detected and initialised successfully
The system works for a while after this oops but eventually gives out. Any pointers how to debug this would be appreciated.
Jurgen
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