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    SubjectOops with 2.6.17-rc5-mm2+hotfixes when loading snd modules
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    I get the following Oops at boot when loading my sound modules :

    BUG: unable to handle kernel NULL pointer dereference at virtual address 00000044
    printing eip:
    f8e18121
    *pde = 00000000
    Oops: 0000 [#1]
    PREEMPT SMP DEBUG_PAGEALLOC
    last sysfs file: /class/vc/vcsa1/dev
    Modules linked in: snd_seq_oss snd_seq_midi_event snd_seq snd_pcm_oss snd_mixer_oss uhci_hcd usbcore snd_emu10k1 snd_rawmidi snd_ac97_codec snd_ac97_bus snd_pcm snd_seq_device snd_timer snd_page_alloc snd_util_mem snd_hwdep snd agpgart
    CPU: 1
    EIP: 0060:[<f8e18121>] Not tainted VLI
    EFLAGS: 00010246 (2.6.17-rc5-mm2 #2)
    EIP is at snd_seq_client_use_ptr+0x71/0x170 [snd_seq]
    eax: 00000000 ebx: 00000000 ecx: c03baa50 edx: 00000000
    esi: 00000001 edi: 00000282 ebp: f3a01ddc esp: f3a01dc8
    ds: 007b es: 007b ss: 0068
    Process modprobe (pid: 2430, threadinfo=f3a01000 task=f3fdf5c0)
    Stack: f3a01ddc c0218a4a 00000000 f3a01de4 f69e0f38 f3a01eb0 f8e1a907 00000001
    00000002 74737953 00006d65 00000000 00000000 00000000 00000000 00000000
    00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    Call Trace:
    <f8e1a907> snd_seq_ioctl_query_next_client+0x47/0xb0 [snd_seq] <f8e1aa8f> snd_seq_do_ioctl+0x6f/0x80 [snd_seq]
    <f8e1ad83> snd_seq_kernel_client_ctl+0x43/0x60 [snd_seq] <f8bd632e> snd_seq_oss_midi_lookup_ports+0x4e/0xa8 [snd_seq_oss]
    <f8bd621a> snd_seq_oss_create_client+0x7a/0x130 [snd_seq_oss] <f8bd6024> alsa_seq_oss_init+0x24/0x70 [snd_seq_oss]
    <c0148897> sys_init_module+0x177/0x280 <c0349743> syscall_call+0x7/0xb
    <b7e79a7e> 0xb7e79a7e
    Code: 00 00 00 b8 20 54 e2 f8 89 fa e8 7b 0f 53 c7 b8 00 f0 ff ff 21 e0 f7 40 14 00 ff ff 0f 0f 85 97 00 00 00 8b 00 8b 80 40 04 00 00 <8b> 40 44 85 c0 0f 84 84 00 00 00 83 fe 0f 0f 8f 88 00 00 00 80
    EIP: [<f8e18121>] snd_seq_client_use_ptr+0x71/0x170 [snd_seq] SS:ESP 0068:f3a01dc8

    This is with 2.6.17-rc5-mm2 + the first 3 hotfixes released by Andrew.
    # uname -a
    Linux dragon 2.6.17-rc5-mm2 #2 SMP PREEMPT Thu Jun 1 23:51:19 CEST 2006 i686 athlon-4 i386 GNU/Linux

    Complete config, dmesg, lspci, cpuinfo, ver_linux output and more can be
    found here:
    http://www.kernel.org/pub/linux/kernel/people/juhl/2.6.17-rc5-mm2+hotfixes/
    Let me know if more info is needed.


    / Jesper Juhl


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