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Subject2.5.59 change broke modules
Previously today I wrote:
> 2.5.59 with CONFIG_PACKET=m oopes when af_packet.ko is insmodded:
> Unable to handle kernel paging request at virtual address 2220c021
> printing eip:
> c0124011
> *pde = 00000000
> Oops: 0000
> CPU: 0
> EIP: 0060:[<c0124011>] Not tainted
> EFLAGS: 00010097
> EIP is at __find_symbol+0x3d/0x7c
> eax: c020f70e ebx: 00000536 ecx: 00000000 edx: c028b600
> esi: 2220c021 edi: e8889558 ebp: e8889558 esp: e67c5ecc
> ds: 007b es: 007b ss: 0068
> Process insmod (pid: 482, threadinfo=e67c4000 task=e6c80ce0)
> Stack: e8888f34 e8889a40 00000038 e8883f50 c0124960 e8889558 e67c5ef4 00000001
> e8888f34 e8889374 e67c5f28 c0124b2a e8883f50 00000016 e8889374 e8889558
> e8889a40 e8883f50 0000000c 00000017 e8889a40 00000000 0000007c c01253a4
> Call Trace:
> [<c0124960>] resolve_symbol+0x20/0x4c
> [<c0124b2a>] simplify_symbols+0x82/0xe4
> [<c01253a4>] load_module+0x5c4/0x7ec
> [<c012562b>] sys_init_module+0x5f/0x194
> [<c0108887>] syscall_call+0x7/0xb

This oops occurs for every module, not just af_packet.ko, at
resolve_symbol()'s first call to __find_symbol().

What happens is that __find_symbol() oopses because the kernel's
symbol table is in la-la land. (Note the bogus kernel adress
2220c021 it tried to dereference above.)

Reverting 2.5.59's patch to arch/i386/ cured the
problem and modules now load correctly for me.

I don't know if this is a problem also for non-i386 archs.

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