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    Subject2.4.19: Oops, probably related to SCSI?
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    Date
    Hi,

    I have an Agfa SnapScan 1236s connected to an Adaptec AVA-1505AE ISA
    SCSI card (using the aha150x driver). When I try to scan something with
    xsane, the kernel (Linux 2.4.19 with XFS patches) oopses.

    I have analysed the oops with ksymoops. Here is the output:

    ksymoops 2.4.5 on i686 2.4.19-xfs. Options used
    -V (default)
    -k /proc/ksyms (default)
    -l /proc/modules (default)
    -o /lib/modules/2.4.19-xfs/ (default)
    -m /boot/System.map-2.4.19-xfs (default)

    Warning: You did not tell me where to find symbol information. I will
    assume that the log matches the kernel and modules that are running
    right now and I'll use the default options above for symbol resolution.
    If the current kernel and/or modules do not match the log, you can get
    more accurate output by telling me the kernel version and where to find
    map, modules, ksyms etc. ksymoops -h explains the options.

    Sep 9 18:41:57 Jupiter kernel: Unable to handle kernel NULL pointer
    dereference at virtual address 0000001b
    Sep 9 18:41:57 Jupiter kernel: d08f22a0
    Sep 9 18:41:57 Jupiter kernel: *pde = 00000000
    Sep 9 18:41:57 Jupiter kernel: Oops: 0000
    Sep 9 18:41:57 Jupiter kernel: CPU: 0
    Sep 9 18:41:57 Jupiter kernel: EIP:
    0010:[keybdev:__insmod_keybdev_O/lib/modules/2.4.19-xfs/kernel/drivers/in+-1678688/96] Not tainted
    Sep 9 18:41:57 Jupiter kernel: EIP: 0010:[<d08f22a0>] Not tainted
    Using defaults from ksymoops -t elf32-i386 -a i386
    Sep 9 18:41:57 Jupiter kernel: EFLAGS: 00010002
    Sep 9 18:41:57 Jupiter kernel: eax: 00000000 ebx: c5ca3000 ecx:
    cec32000 edx: c5528500
    Sep 9 18:41:57 Jupiter kernel: esi: cf6df400 edi: 00000004 ebp:
    c5d83d88 esp: c5d83d6c
    Sep 9 18:41:57 Jupiter kernel: ds: 0018 es: 0018 ss: 0018
    Sep 9 18:41:57 Jupiter kernel: Process xsane (pid: 2478,
    stackpage=c5d83000)
    Sep 9 18:41:57 Jupiter kernel: Stack: cfffc0c0 00000020 c010d098
    00000297 00000293 c7f7e514 c5ca3000 c5d83da4
    Sep 9 18:41:57 Jupiter kernel: d08f23c0 c5ca3000 00000000
    00000000 00000000 d08d9f70 c5d83de0 d08d9684
    Sep 9 18:41:57 Jupiter kernel: c5ca3000 d08d9f70 d08de760
    00000004 c7f7e576 c7f7e4c0 c7f7e514 cf8971a0
    Sep 9 18:41:57 Jupiter kernel: Call Trace: [IRQ0x7c_interrupt+8/16]
    [keybdev:__insmod_keybdev_O/lib/modules/2.4.19-xfs/kernel/drivers/in+-1678400/96] [keybdev:__insmod_keybdev_O/lib/modules/2.4.19-xfs/kernel/drivers/in+-1777808/96] [keybdev:__insmod_keybdev_O/lib/modules/2.4.19-xfs/kernel/drivers/in+-1780092/96] [keybdev:__insmod_keybdev_O/lib/modules/2.4.19-xfs/kernel/drivers/in+-1777808/96]
    Sep 9 18:41:57 Jupiter kernel: Call Trace: [<c010d098>] [<d08f23c0>]
    [<d08d9f70>] [<d08d9684>] [<d08d9f70>]
    Sep 9 18:41:57 Jupiter kernel: [<d08de760>] [<d08e22ce>] [<d23e9628>]
    [<d08e1765>] [<d08e17f9>] [<d08d9a7a>]
    Sep 9 18:41:57 Jupiter kernel: [<d23ea2e0>] [<d23e90b2>] [<d23ea2e0>]
    [<d23e8df3>] [<d23e8bd7>] [<c013ce3c>]
    Sep 9 18:41:57 Jupiter kernel: [<c0109307>]
    Sep 9 18:41:57 Jupiter kernel: Code: 0f b6 50 1b 8b 14 95 d8 b5 30 c0
    2b 82 9c 00 00 00 c1 f8 02


    >>EIP; d08f22a0 <[scsi_mod].bss.end+251d/b2dd> <=====

    >>ebx; c5ca3000 <_end+597013c/1059d19c>
    >>ecx; cec32000 <_end+e8ff13c/1059d19c>
    >>edx; c5528500 <_end+51f563c/1059d19c>
    >>esi; cf6df400 <_end+f3ac53c/1059d19c>
    >>ebp; c5d83d88 <_end+5a50ec4/1059d19c>
    >>esp; c5d83d6c <_end+5a50ea8/1059d19c>

    Trace; c010d098 <call_do_IRQ+5/d>
    Trace; d08f23c0 <[scsi_mod].bss.end+263d/b2dd>
    Trace; d08d9f70 <[scsi_mod]scsi_done+0/d0>
    Trace; d08d9684 <[scsi_mod]scsi_dispatch_cmd+124/390>
    Trace; d08d9f70 <[scsi_mod]scsi_done+0/d0>
    Trace; d08de760 <[scsi_mod]scsi_times_out+0/d0>
    Trace; d08e22ce <[scsi_mod]scsi_request_fn+18e/310>
    Trace; d23e9628 <[sg]sg_ioctl+4e8/c60>
    Trace; d08e1765 <[scsi_mod]__scsi_insert_special+55/80>
    Trace; d08e17f9 <[scsi_mod]scsi_insert_special_req+29/30>
    Trace; d08d9a7a <[scsi_mod]scsi_do_req+da/1c0>
    Trace; d23ea2e0 <[sg]sg_cmd_done_bh+0/370>
    Trace; d23e90b2 <[sg]sg_common_write+202/290>
    Trace; d23ea2e0 <[sg]sg_cmd_done_bh+0/370>
    Trace; d23e8df3 <[sg]sg_new_write+1c3/280>
    Trace; d23e8bd7 <[sg]sg_write+2f7/350>
    Trace; c013ce3c <sys_write+9c/130>
    Trace; c0109307 <system_call+33/38>

    Code; d08f22a0 <[scsi_mod].bss.end+251d/b2dd>
    00000000 <_EIP>:
    Code; d08f22a0 <[scsi_mod].bss.end+251d/b2dd> <=====
    0: 0f b6 50 1b movzbl 0x1b(%eax),%edx <=====
    Code; d08f22a4 <[scsi_mod].bss.end+2521/b2dd>
    4: 8b 14 95 d8 b5 30 c0 mov 0xc030b5d8(,%edx,4),%edx
    Code; d08f22ab <[scsi_mod].bss.end+2528/b2dd>
    b: 2b 82 9c 00 00 00 sub 0x9c(%edx),%eax
    Code; d08f22b1 <[scsi_mod].bss.end+252e/b2dd>
    11: c1 f8 02 sar $0x2,%eax


    1 warning issued. Results may not be reliable.

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