oops when rmmoding scsi ppa

Adrian Bridgett (bridgett@uk.ibm.com)
Thu, 5 Nov 1998 09:18:04 +0000


on 2.1.126 (I don't think it was patched)

rmmod ppa parport scsi_mod sd_mod

Unable to handle kernel NULL pointer
dereference at virtual address 00000028
current->tss.cr3 = 00b68000, %cr3 = 00b68000
*pde = 00000000
Oops: 0000
CPU: 0
EIP: 0010:[<c585114b>]
EFLAGS: 00010213
eax: c030f9e0 ebx: 00000000 ecx: 00000000 edx: c030f9e0
esi: c5851e5c edi: 00000000 ebp: bffff6a0 esp: c4497f90
ds: 0018 es: 0018 ss: 0018
Process rmmod (pid: 6177, process nr: 67, stackpage=c4497000)
Stack: 00000000 c0114274 c584e000 fffffff0 00000000 c01137f2 c584e000 00000000
c4496000 00000000 00000000 c0b69000 c0107a34 0804f838 00000000 bffff718
00000000 00000000 bffff6a0 00000081 0000002b 0000002b 00000081 0804d45e
Call Trace: [free_module+32/156] [<c584e000>] [sys_delete_module+298/464] [<c584e000>] [system_call+52/56]
Code: 8b 49 28 85 c9 75 ca 0f b6 05 08 1e 85 c5 83 c0 0f 39 c7 74

/proc/ksyms didn't contain c585, however after a reboot:

c5850d14 revalidate_scsidisk [sd_mod]
c5851358 sd_ioctl [sd_mod]
c5851df0 rscsi_disks [sd_mod]
c5851df4 sd_template [sd_mod]
c5851ee0 sd [sd_mod]

Cheers

Adrian

Adrian Bridgett <bridgett@hursley.ibm.com>
Internal: 7-245528 External: 01962-815528

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