Messages in this thread | | | Date | Fri, 23 Aug 2002 10:33:18 +0200 | From | Andreas Romeyke <> | Subject | Linux 2.4.19: possible kernel bug by accessing CD/ISO |
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Hello,
On Kernel 2.4.19 I can reproduce a possible kernelbug. If I read extensively from a mounted CDROM or DVD (IDE with generic SCSI-Emulation), or an ISO-Image there will be a kernel-oops. User-space programs are not the source, because the error exists if I used tar, cp or mc. There is no special file or dir where the oops will be generated. The oops needs 0.000x up to 2 seconds of access, sometimes meanly all files and dirs could be accessed, or there is an oops by reading main-directory of CDR.
The ISO-Image was created by xcdroast 0.98alpha10 with mkisofs 1.14 and cdrecord 1.10 under linux 2.4.19 (official tree without additional patches) and contains only a normal dir-structure, pE. Linux-sources).
The extraction of the ISO-Image via dd or xcdroast produces no error, but the extracted image mounted via loopback or roasted on a new cdr is not accessable. The error exists also, if the CDR is mounted or extracted via DVD-drive.
The same CDR and the same ISO-Image can be mounted and accessed via cp, tar and Co. under linux 2.2.19 without problems. There is also no problem under other OS. Isovfy means the ISO-image is ok. Memtest86 reports no errors on RAM (test 1-4).
Other ISOs or CDRs were tested, with any CDRs (other types roasted with other CDR-drives) the problem is reproduceable. All my tested CDRs used Rock Ridge or Joliet Extensions.
Hope that helps,
Bye Andreas
PS.: next lines: hardware, /proc/pci, ksymoops-report
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Here my hardware:
AMD K6-II 450 192 MB SDRAM CD-RW BCE2410IM LITEON DVD-ROM LTD163D FIC Mainboard (VIA MVP3+)
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Here the lines from `cat /proc/pci`:
PCI devices found: Bus 0, device 0, function 0: Host bridge: VIA Technologies, Inc. VT82C597 [Apollo VP3] (rev 4). Master Capable. Latency=16. Prefetchable 32 bit memory at 0xe0000000 [0xe3ffffff]. Bus 0, device 1, function 0: PCI bridge: VIA Technologies, Inc. VT82C598/694x [Apollo MVP3/Pro133x AGP] (rev 0). Master Capable. No bursts. Min Gnt=12. Bus 0, device 7, function 0: ISA bridge: VIA Technologies, Inc. VT82C586/A/B PCI-to-ISA [Apollo VP] (rev 65). Bus 0, device 7, function 1: IDE interface: VIA Technologies, Inc. Bus Master IDE (rev 6). Master Capable. Latency=64. I/O at 0xe400 [0xe40f]. Bus 0, device 7, function 3: PCI bridge: VIA Technologies, Inc. VT82C586B ACPI (rev 16). IRQ 9. Bus 0, device 8, function 0: Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C (rev 16). IRQ 5. Master Capable. Latency=64. Min Gnt=32.Max Lat=64. I/O at 0xe800 [0xe8ff]. Non-prefetchable 32 bit memory at 0xea000000 [0xea0000ff]. Bus 0, device 9, function 0: Multimedia video controller: Brooktree Corporation Bt848 TV with DMA push (rev 18). IRQ 11. Master Capable. Latency=64. Min Gnt=16.Max Lat=40. Prefetchable 32 bit memory at 0xea001000 [0xea001fff]. Bus 0, device 10, function 0: Multimedia audio controller: Ensoniq ES1371 [AudioPCI-97] (rev 8). IRQ 10. Master Capable. Latency=64. Min Gnt=12.Max Lat=128. I/O at 0xec00 [0xec3f]. Bus 1, device 0, function 0: VGA compatible controller: Matrox Graphics, Inc. MGA G400 AGP (rev 4). IRQ 5. Master Capable. Latency=64. Min Gnt=16.Max Lat=32. Prefetchable 32 bit memory at 0xe8000000 [0xe9ffffff]. Non-prefetchable 32 bit memory at 0xe4000000 [0xe4003fff]. Non-prefetchable 32 bit memory at 0xe5000000 [0xe57fffff]. ------------------------------------------------------
ksymoops 2.4.5 on i586 2.4.19. Options used -V (default) -k /proc/ksyms (default) -l /proc/modules (default) -o /lib/modules/2.4.19/ (default) -m /boot/System.map-2.4.19 (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.
No modules in ksyms, skipping objects Warning (read_lsmod): no symbols in lsmod, is /proc/modules a valid lsmod file? Error (regular_file): read_system_map stat /boot/System.map-2.4.19 failed 8139too Fast Ethernet driver 0.9.25 ac97_codec: AC97 Audio codec, id: 0x4352:0x5913 (Cirrus Logic CS4297A rev A) Unable to handle kernel paging request at virtual address 80272ab8 c013955c *pde = 00000000 Oops: 0002 CPU: 0 EIP: 0010:[<c013955c>] Not tainted Using defaults from ksymoops -t elf32-i386 -a i386 EFLAGS: 00010202 eax: c013955c ebx: 00000000 ecx: c6263e00 edx: 40000001 esi: c6263e00 edi: ca971fa4 ebp: 00000fff esp: ca971f80 ds: 0018 es: 0018 ss: 0018 Process mc (pid: 696, stackpage=ca971000) Stack: c0134675 c7f3e340 bfffe8fc 00000fff c6263e00 ca970000 080fa578 08108c20 bfffe87c c7f3e340 c12164e0 ca970000 080fa578 00000026 00000008 00000001 c0108593 08108c20 bfffe8fc 00000fff 080fa578 08108c20 bfffe87c 00000055 Call Trace: [<c0134675>] [<c0108593>] Code: 83 2c 00 04 57 56 53 8b 5c 24 14 8b 7c 24 18 8b 74 24 1c c7
>>EIP; c013955c <page_readlink+0/4c> <=====
>>eax; c013955c <page_readlink+0/4c> >>ecx; c6263e00 <END_OF_CODE+5f045c8/????> >>edx; 40000001 Before first symbol >>esi; c6263e00 <END_OF_CODE+5f045c8/????> >>edi; ca971fa4 <END_OF_CODE+a61276c/????> >>ebp; 00000fff Before first symbol >>esp; ca971f80 <END_OF_CODE+a612748/????>
Trace; c0134675 <cdput+5cd/868> Trace; c0108593 <__up_wakeup+102f/2324>
Code; c013955c <page_readlink+0/4c> 00000000 <_EIP>: Code; c013955c <page_readlink+0/4c> <===== 0: 83 2c 00 04 subl $0x4,(%eax,%eax,1) <===== Code; c0139560 <page_readlink+4/4c> 4: 57 push %edi Code; c0139561 <page_readlink+5/4c> 5: 56 push %esi Code; c0139562 <page_readlink+6/4c> 6: 53 push %ebx Code; c0139563 <page_readlink+7/4c> 7: 8b 5c 24 14 mov 0x14(%esp,1),%ebx Code; c0139567 <page_readlink+b/4c> b: 8b 7c 24 18 mov 0x18(%esp,1),%edi Code; c013956b <page_readlink+f/4c> f: 8b 74 24 1c mov 0x1c(%esp,1),%esi Code; c013956f <page_readlink+13/4c> 13: c7 00 00 00 00 00 movl $0x0,(%eax)
2 warnings and 1 error issued. Results may not be reliable. [unhandled content-type:application/pgp-signature] | |