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    SubjectRe: Linux 2.4.20-pre5-ac4
    On Sunday 08 September 2002 19:10, Alan Cox wrote:
    > > Bog standard (sic) rawhide, so here we go (still havent rebooted to
    > > the untainted kernel yet):
    > Ok same compiler. So its something on the ide-cd/ide-scsi side I don't
    > trip. Curiouser and curiouser

    it happened to me, different compiler different system, different cause

    after loading (using modprobe) sr_mod, ide-scsi and sg in that order I tried
    to mount a cdrom but this resulted in a Segmentation Fault and a kernel oops.

    Oops and system info below


    ksymoops 2.4.3 on i686 2.4.20-pre5-ac3. Options used
    -V (default)
    -K (specified)
    -L (specified)
    -o /lib/modules/2.4.20-pre5-ac3/ (default)
    -m /boot/ (specified)

    No modules in ksyms, skipping objects
    kernel BUG at
    invalid operand: 0000
    CPU: 0
    EIP: 0010:[ide_build_sglist+76/400] Not tainted
    EFLAGS: 00010206
    eax: 0000005a ebx: c1363000 ecx: c02e04d4 edx: c9823840
    esi: 00000000 edi: c9823840 ebp: c9820800 esp: c7aa7c34
    ds: 0018 es: 0018 ss: 0018
    Process mount (pid: 499, stackpage=c7aa7000)
    Stack: c1363000 c02e0584 c9823840 c9820800 d1b75a9d c02e0584 000000a0 c1360000
    c01c889b c02e04d4 c9823840 c02e04d4 c02e0584 c9823840 c9820800 00000000
    00000000 c02e04d4 c01c8d69 c02e0584 c9823840 c02e0584 c02e0584 c869e840
    Call Trace: [<d1b75a9d>] [ide_build_dmatable+91/416]
    [__ide_dma_read+41/288] [<d1b75963>] [<d1b75acb>]
    [<d1b666b0>] [<d1b67ed1>] [<d1b73400>] [generic_unplug_device+32/48]
    [__run_task_queue+76/96] [__wait_on_buffer+86/144]
    [<d1b940a8>] [do_add_mount+105/320] [do_mount+338/368]
    [copy_mount_options+77/160] [sys_mount+132/208] [system_call+51/56]
    Code: 0f 0b 99 00 e0 75 24 c0 8b 44 24 24 c7 80 24 04 00 00 01 00
    Using defaults from ksymoops -t elf32-i386 -a i386

    Trace; d1b75a9c <END_OF_CODE+1188fcc8/????>
    Trace; d1b666b0 <END_OF_CODE+118808dc/????>
    Trace; d1b67ed0 <END_OF_CODE+118820fc/????>
    Trace; d1b73400 <END_OF_CODE+1188d62c/????>
    Trace; d1b940a8 <END_OF_CODE+118ae2d4/????>
    Code; 00000000 Before first symbol
    00000000 <_EIP>:
    Code; 00000000 Before first symbol
    0: 0f 0b ud2a
    Code; 00000002 Before first symbol
    2: 99 cltd
    Code; 00000002 Before first symbol
    3: 00 e0 add %ah,%al
    Code; 00000004 Before first symbol
    5: 75 24 jne 2b <_EIP+0x2b> 0000002a Before first
    Code; 00000006 Before first symbol
    7: c0 8b 44 24 24 c7 80 rorb $0x80,0xc7242444(%ebx)
    Code; 0000000e Before first symbol
    e: 24 04 and $0x4,%al
    Code; 00000010 Before first symbol
    10: 00 00 add %al,(%eax)
    Code; 00000012 Before first symbol
    12: 01 00 add %eax,(%eax)

    If some fields are empty or look unusual you may have an old version.
    Compare to the current minimal requirements in Documentation/Changes.

    Linux gandalf 2.4.20-pre5-ac3 #1 Sun Sep 8 15:42:17 CEST 2002 i686 unknown

    Gnu C 2.95.3
    Gnu make 3.79.1
    util-linux 2.11q
    mount 2.11q
    modutils 2.4.16
    e2fsprogs 1.27
    reiserfsprogs 3.x.1b
    Linux C Library 2.2.5
    Dynamic linker (ldd) 2.2.5
    Procps 2.0.7
    Net-tools 1.60
    Kbd 1.06
    Sh-utils 2.0
    Modules Loaded

    output after loading scsi modules:
    Vendor: IOMEGA Model: ZIP 100 Rev: 23.D
    Type: Direct-Access ANSI SCSI revision: 00
    Vendor: HL-DT-ST Model: CD-RW GCE-8240B Rev: 1.06
    Type: CD-ROM ANSI SCSI revision: 02
    Attached scsi CD-ROM sr0 at scsi0, channel 0, id 1, lun 0
    sr0: scsi3-mmc drive: 24x/40x writer cd/rw xa/form2 cdda tray

    relevant part of dmesg:
    Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
    ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
    SIS5513: IDE controller at PCI slot 00:02.5
    SIS5513: chipset revision 208
    SIS5513: not 100% native mode: will probe irqs later
    SiS735 ATA 100 controller
    ide0: BM-DMA at 0xff00-0xff07, BIOS settings: hda:DMA, hdb:DMA
    ide1: BM-DMA at 0xff08-0xff0f, BIOS settings: hdc:DMA, hdd:DMA
    blk: queue c02e0120, I/O limit 4095Mb (mask 0xffffffff)
    hdc: HL-DT-ST CD-RW GCE-8240B, ATAPI CD/DVD-ROM drive
    hdd: DMA disabled
    ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
    ide1 at 0x170-0x177,0x376 on irq 15
    hda: host protected area => 1
    hda: 40132503 sectors (20548 MB) w/1902KiB Cache, CHS=2498/255/63, UDMA(100)
    Partition check:
    /dev/ide/host0/bus0/target0/lun0: p1 p2 p3 p4 < p5 p6 p7 p8 >

    00:00.0 Host bridge: Silicon Integrated Systems [SiS]: Unknown device 0735
    (rev 01)
    00:01.0 PCI bridge: Silicon Integrated Systems [SiS] 5591/5592 AGP
    00:02.0 ISA bridge: Silicon Integrated Systems [SiS] 85C503/5513
    00:02.5 IDE interface: Silicon Integrated Systems [SiS] 5513 [IDE] (rev d0)
    00:0b.0 Ethernet controller: Winbond Electronics Corp W89C940
    00:0f.0 Multimedia audio controller: Ensoniq 5880 AudioPCI (rev 02)
    00:11.0 Ethernet controller: Winbond Electronics Corp W89C940
    01:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G200 AGP (rev 01)
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