Re: 2.6.10-rc1 bttv oops in btcx_riscmem_free

From: Peter Osterlund (petero2_at_telia.com)
Date: 10/30/04

  • Next message: Jurriaan: "Re: 2.6.10-rc1 crashes on recursive directory walk [2.6.9 was OK]" 
    To: kraxel@bytesex.org
Date:	30 Oct 2004 19:22:00 +0200

    Eyal Lebedinsky <eyal@eyal.emu.id.au> writes:

    > Watching on Mythtv, I stopped watching on the client. at this point
    > the picture froze. Looking in dmesg I see this oops. The machine
    > quicly becomes unusable ('ps aux' hangs).
    >
    > I then applied the v4l patches off the list. Still the same problem.
    >
    > Unable to handle kernel paging request at virtual address 85525fe9

    I have similar problems using 2.6.10-rc1-bk8. Often when I exit
    tvtime, I get "unable to handle kernel paging request" or "unable to
    handle kernel NULL pointer", see below.

    The previous kernel I used on this machine was 2.6.9-rc3-bk9, which
    does not have this problem.

    I can do a binary search to figure out when it broke if you think it
    will help.

    Oct 30 14:12:55 p4 kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000011
    Oct 30 14:12:55 p4 kernel: printing eip:
    Oct 30 14:12:55 p4 kernel: c010a237
    Oct 30 14:12:55 p4 kernel: *pde = 00000000
    Oct 30 14:12:55 p4 kernel: Oops: 0000 [#1]
    Oct 30 14:12:55 p4 kernel: PREEMPT
    Oct 30 14:12:55 p4 kernel: Modules linked in: snd_pcm_oss tuner tda9887 msp3400 bttv video_buf firmware_class v4l2_common btcx_risc videodev snd_mixer_oss snd_emu10k1 snd_rawmidi snd_ac97_codec snd_pcm snd_timer snd_page_alloc snd_util_mem snd_hwdep snd soundcore radeon nfsd exportfs lockd parport_pc lp parport autofs4 sunrpc ipt_MASQUERADE iptable_nat ipt_LOG ipt_limit ipt_state ipt_REJECT iptable_filter ip_tables sd_mod dm_mod usb_storage uhci_hcd ehci_hcd rtc
    Oct 30 14:12:55 p4 kernel: CPU: 0
    Oct 30 14:12:55 p4 kernel: EIP: 0060:[<c010a237>] Not tainted VLI
    Oct 30 14:12:55 p4 kernel: EFLAGS: 00210206 (2.6.10-rc1-bk8)
    Oct 30 14:12:55 p4 kernel: EIP is at dma_free_coherent+0x30/0x67
    Oct 30 14:12:55 p4 kernel: eax: 00000000 ebx: e429d000 ecx: e429d000 edx: 00000000
    Oct 30 14:12:55 p4 kernel: esi: 00000011 edi: e3a14f34 ebp: eac6a800 esp: de55bee4
    Oct 30 14:12:55 p4 kernel: ds: 007b es: 007b ss: 0068
    Oct 30 14:12:55 p4 kernel: Process tvtime (pid: 5018, threadinfo=de55a000 task=e19ac580)
    Oct 30 14:12:55 p4 kernel: Stack: e7b3d680 e3a14e80 f8a3203d e7b3d6c4 00000c38 e429d000 2429d000 e3a14ea4
    Oct 30 14:12:55 p4 kernel: e7b3d880 f8d2fb35 e7b3d680 e3a14f34 00000000 00000000 e79e7720 ee3744bc
    Oct 30 14:12:55 p4 kernel: f8afbc55 e7b3d880 e3a14e80 00035000 eac6a800 de55a000 de55a000 e7861c80
    Oct 30 14:12:55 p4 kernel: Call Trace:
    Oct 30 14:12:55 p4 kernel: [<f8a3203d>] btcx_riscmem_free+0x3d/0x84 [btcx_risc]
    Oct 30 14:12:55 p4 kernel: [<f8d2fb35>] bttv_dma_free+0x74/0x9f [bttv]
    Oct 30 14:12:55 p4 kernel: [<f8afbc55>] videobuf_vm_close+0x97/0xc9 [video_buf]
    Oct 30 14:12:55 p4 kernel: [<c014348b>] remove_vm_struct+0x8e/0x97
    Oct 30 14:12:55 p4 kernel: [<c0144c85>] unmap_vma_list+0x1c/0x28
    Oct 30 14:12:55 p4 kernel: [<c0145008>] do_munmap+0x142/0x17f
    Oct 30 14:12:55 p4 kernel: [<c0145089>] sys_munmap+0x44/0x64
    Oct 30 14:12:55 p4 kernel: [<c0103fbd>] sysenter_past_esp+0x52/0x71
    Oct 30 14:12:55 p4 kernel: Code: 44 24 0c 8b 54 24 10 8b 5c 24 14 85 c0 74 06 8b b0 b8 00 00 00 8d 42 ff ba ff ff ff ff c1 e8 0b 83 c2 01 d1 e8 75 f9 85 f6 74 13 <8b> 0e 39 cb 72 0d 8b 46 08 c1 e0 0c 8d 04 08 39 c3 72 09 89 d8 

    -- 
Peter Osterlund - petero2@telia.com
http://w1.894.telia.com/~u89404340
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