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Date: Tue, 16 Mar 2004 14:26:06 +0530
From: Maneesh Soni <maneesh@in.ibm.com>
To: Badari Pulavarty <pbadari@us.ibm.com>
Cc: Andrew Morton <akpm@osdl.org>, Greg KH <gregkh@us.ibm.com>,
       linux-kernel@vger.kernel.org
Subject: Re: sysfs panic on 2.6.4-mm1
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Try 2.6.4-mm2. I tested with scsi_debug and problem disappeared in 2.6.4-mm2.
It is fixed by this patch.

http://marc.theaimsgroup.com/?l=bk-commits-head&m=107928795812635&w=2


Maneesh

On Mon, Mar 15, 2004 at 10:20:23PM +0000, Badari Pulavarty wrote:
> Happend while rmmod qla2200 on 2.6.4-mm1.
> 
> Thanks,
> Badari
> 
> Unable to handle kernel NULL pointer dereference at virtual address 0000000c
>  printing eip:
> c019e1df
> *pde = 00000000
> Oops: 0000 [#1]
> SMP
> CPU:    7
> EIP:    0060:[<c019e1df>]    Not tainted VLI
> EFLAGS: 00010282   (2.6.4-mm1)
> EIP is at sysfs_hash_and_remove+0xf/0x6e
> eax: 00000000   ebx: f634c298   ecx: f634c23c   edx: c03d82f9
> esi: 00000000   edi: 00000000   ebp: f2f87eac   esp: f2f87ea4
> ds: 007b   es: 007b   ss: 0068
> Process rmmod (pid: 23347, threadinfo=f2f86000 task=f79e26b0)
> Stack: f634c298 f634c298 f2f87ec8 c0299c29 c0449be4 f634c244 f634c298 f634c184
>        00000000 f2f87ed4 c0299c6b f634c000 f2f87ee4 c02c1ffd f3a50000 f7bbb000
>        f2f87ef4 c02c14ff f3a50000 c3366044 f2f87f00 c02bb72b f3a501e0 f2f87f10
> Call Trace:
>  [<c0299c29>] class_device_del+0x89/0xc0
>  [<c0299c6b>] class_device_unregister+0xb/0x20
>  [<c02c1ffd>] scsi_remove_device+0x4d/0x90
>  [<c02c14ff>] scsi_forget_host+0x3f/0x70
>  [<c02bb72b>] scsi_remove_host+0x1b/0x50
>  [<f8978bc4>] qla2x00_remove_one+0x74/0xb0 [qla2xxx]
>  [<c0255a4c>] pci_device_remove+0x2c/0x30
>  [<c0298fe9>] device_release_driver+0x59/0x60
>  [<c0299018>] driver_detach+0x28/0x40
>  [<c029923c>] bus_remove_driver+0x3c/0x70
>  [<c02995db>] driver_unregister+0xb/0x1d
>  [<c0255bfe>] pci_unregister_driver+0xe/0x20
>  [<c013c201>] sys_delete_module+0x121/0x170
>  [<c0155e5a>] unmap_vma_list+0x1a/0x30
>  [<c01562a7>] do_munmap+0x127/0x190
>  [<c0156352>] sys_munmap+0x42/0x70
>  [<c03a5c1e>] sysenter_past_esp+0x43/0x65
> 
> Code: f2 e8 b6 26 fd ff 83 c4 10 5b 5e 5f 5d c3 8d b4 26 00 00 00 00 8d bc 27 00 00 00 00 55 89 e5 83 ec 08 89 74 24 04 89 c6 89 1c 24 <8b> 40 0c 8d 48 74 f0 ff 48 74 78 53 89 f0 e8 6e ff ff ff 3d 18
> 
> -
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-- 
Maneesh Soni
Linux Technology Center, 
IBM Software Lab, Bangalore, India
email: maneesh@in.ibm.com
Phone: 91-80-25044999 Fax: 91-80-25268553
T/L : 9243696
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