Re: Crash when loading a module (without executing any code of the module!)

[Michael Tasche]

Hi,
 
attached you will find the .configs of the two kernel-trees.
 
-Michael
 
On Wed, 30 Jun 2004 14:29:48 -0700, Randy.Dunlap <rddunlap@xxxxxxxx> wrote:
>
>Hi-
> 
>On Wed, 30 Jun 2004 15:41:27 +0200 Michael Tasche wrote:
>| Hi,
>| currently I'm developping a small kernel module for a hardware (which was developped by a friend of mine), which is
>| supposed to load a firmware onto a PCI-card.
>|
>| The development is done together with the friend, who's developping the firmware.
>| We tried the following:
>| He compiled a kernel-independent object (containing the firmware) on his system using kbuild
>| (Dual-AthlonMP, SuSE 8.2 with kernel.org-kernel 2.6.3, module-init-tools 0.9.14-pre2, gcc 3.3.1,
>| ld 2.14.90.0.5 20030722).
>| Afterwards I tried to link it to my kernel-module (using the same kbuild makefile with
>| firmware.o_shipped) on my machine (Fedora2, 2.6.5-3.1smp, module-init-tools 3.0-pre10, gcc 3.3.3, ld 2.15.90.0.3
>| 20040415).
>|
>| This is what happened:
>|
>| Unable to handle kernel paging request at virtual address 82d90700
>|  printing eip:
>| 02135657
>| *pde = 00000000
>| Oops: 0002 [#1]
>| PREEMPT SMP
>| CPU:    1
>| EIP:    0060:[<02135657>]    Not tainted
>| EFLAGS: 00010246   (2.6.5-3.1smp)
>| EIP is at module_unload_init+0xa/0x4d
>| eax: 82d90700   ebx: 82c2387c   ecx: 82d8f600   edx: 00000000
>| esi: 82c38f33   edi: 82c40027   ebp: 000005f0   esp: 763c3f38
>| ds: 007b   es: 007b   ss: 0068
>| Process insmod (pid: 1812, threadinfo=763c2000 task=7f3c60b0)
>| Stack: 02136dc0 7864cc40 8282a000 00000000 82d8f600 00000000 00000000 00000000
>|        00000000 00000000 0000000b 00000000 00000010 00000000 00000000 00000009
>|        00000025 00000024 00000026 82c3829c 82c23727 82a94000 0856a008 763c3fc4
>| Call Trace:
>|  [<02136dc0>] load_module+0x53e/0x7fa
>|  [<021370da>] sys_init_module+0x5e/0x293
>|
>| Code: 89 81 00 11 00 00 89 81 04 11 00 00 89 c8 c7 80 00 01 00 00
> 
>Some of those stack addresses look odd to me.
>Please send me your kernel .config file.
> 
>| What puzzles me, is that I don't see any of my code in the calltrace. I had a look into the
>| kernel-code and it seems to crash, before it even jumps into my code. What am I missing?
>| By the way, everything works fine, if I compile the entire module on my machine.
>| Some more testing showed, that we do also expierence a crash, if we do everything vice-versa.
>|
>| Regards,
>| Michael
>|
>| P.S: This was also posted by the driver developer to comp.os.linux.development.system.
> 
>Can you post the module source code, or a subset of it that causes
>the problem?
> 
>--
>~Randy
>-
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