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SubjectOops in usblp_cleanup, 2.6.0-test3
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Date

While printing to my USB printer (HP PhotoSmart 1000) I got the
following errors:

drivers/usb/class/usblp.c: usblp0: error -84 reading printer status
drivers/usb/class/usblp.c: usblp0: error -110 reading printer status
drivers/usb/class/usblp.c: usblp0: error -110 reading printer status
drivers/usb/class/usblp.c: usblp0: error -110 reading printer status

I then powered off the printer (HP PhotoSmart P1000) and then turned it
on again:

usb 1-2: USB disconnect, address 2
hub 1-0:0: debounce: port 2: delay 100ms stable 4 status 0x101
hub 1-0:0: new USB device on port 2, assigned address 3
drivers/usb/class/usblp.c: usblp0: USB Bidirectional printer dev 3 if 0
alt 1 proto 2 vid 0x03F0 pid 0x3002
drivers/usb/class/usblp.c: usblp0: removed

Finally, I get this oops:

Unable to handle kernel paging request at virtual address fbceed1f
c0269c75
*pde = 00000000
Oops: 0000 [#1]
CPU: 0
EIP: 0060:[<c0269c75>] Not tainted
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010286
eax: d1d9a400 ebx: d1d79be0 ecx: c0475cc4 edx: fbceecff
esi: d1d79be4 edi: d1fc4820 ebp: d05538e0 esp: cef3bf3c
ds: 007b es: 007b ss: 0068
Stack: 00000007 d1d79be0 d1d79be4 d1fc4820 d2a0f37e d1d9a400 00002000
d1646000
11646000 d1d79be0 d2a0f478 d1d79be0 d18165a0 d183f880 c015505a
d05538e0
d18165a0 ceff91c0 d18165a0 d183f880 00000000 cef3a000 c015368d
d18165a0
Call Trace:
[<d2a0f37e>] usblp_cleanup+0x3e/0xa0 [usblp]
[<d2a0f478>] usblp_release+0x58/0x60 [usblp]
[<c015505a>] __fput+0x10a/0x120
[<c015368d>] filp_close+0x4d/0x80
[<c0153721>] sys_close+0x61/0xa0
[<c010adab>] syscall_call+0x7/0xb
Code: 8b 4a 20 85 c9 74 14 8b 41 18 85 c0 75 11 8d b6 00 00 00 00


>>EIP; c0269c75 <usb_buffer_free+15/60> <=====

>>eax; d1d9a400 <__crc_auth_unix_lookup+4c2ca/55b66>
>>ebx; d1d79be0 <__crc_auth_unix_lookup+2baaa/55b66>
>>ecx; c0475cc4 <per_cpu__runqueues+24/928>
>>edx; fbceecff <__crc_pskb_expand_head+d5fa8/38150d>
>>esi; d1d79be4 <__crc_auth_unix_lookup+2baae/55b66>
>>edi; d1fc4820 <__crc_nf_setsockopt+220b84/48b840>
>>ebp; d05538e0 <__crc_nf_unregister_sockopt+182799/30cc9c>
>>esp; cef3bf3c <__crc_ide_toggle_bounce+a7c45/39b93c>

Trace; d2a0f37e <__crc_d_invalidate+3e7df0/3f8239>
Trace; d2a0f478 <__crc_d_invalidate+3e7eea/3f8239>
Trace; c015505a <__fput+10a/120>
Trace; c015368d <filp_close+4d/80>
Trace; c0153721 <sys_close+61/a0>
Trace; c010adab <syscall_call+7/b>

Code; c0269c75 <usb_buffer_free+15/60>
00000000 <_EIP>:
Code; c0269c75 <usb_buffer_free+15/60> <=====
0: 8b 4a 20 mov 0x20(%edx),%ecx <=====
Code; c0269c78 <usb_buffer_free+18/60>
3: 85 c9 test %ecx,%ecx
Code; c0269c7a <usb_buffer_free+1a/60>
5: 74 14 je 1b <_EIP+0x1b>
Code; c0269c7c <usb_buffer_free+1c/60>
7: 8b 41 18 mov 0x18(%ecx),%eax
Code; c0269c7f <usb_buffer_free+1f/60>
a: 85 c0 test %eax,%eax
Code; c0269c81 <usb_buffer_free+21/60>
c: 75 11 jne 1f <_EIP+0x1f>
Code; c0269c83 <usb_buffer_free+23/60>
e: 8d b6 00 00 00 00 lea 0x0(%esi),%esi


--
Rafael D'Halleweyn (List) <list@noduck.net>

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