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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)
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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