http://qa.mandrakesoft.com/show_bug.cgi?id=6248
Summary: kernel oopses when ubplugging ups battery's usb link
Product: kernel
Version: 2.4.22-21mdk
Platform: Other
OS/Version: All
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: default
AssignedTo: [EMAIL PROTECTED]
ReportedBy: [EMAIL PROTECTED]
connecting an "[MGE UPS SYSTEMS Evolution" to an "Intel Corporation|82371AB
PIIX4 USB [SERIAL_USB]" controller used to slow down all processes reading /proc/
usb/bus/devices until it get unplugged.
with kernel-2.4.22-21mdk, it even oopses on device unplug:
usb_control/bulk_msg: timeout
usb_control/bulk_msg: timeout
usb_control/bulk_msg: timeout
usb_control/bulk_msg: timeout
usb_control/bulk_msg: timeout
usb_control/bulk_msg: timeout
usb_control/bulk_msg: timeout
usb_control/bulk_msg: timeout
usb_control/bulk_msg: timeout
usb_control/bulk_msg: timeout
usb_control/bulk_msg: timeout
usb_control/bulk_msg: timeout
usb-uhci.c: interrupt, status 2, frame# 381
usb.c: USB disconnect on device 00:07.2-1 address 2
Unable to handle kernel NULL pointer dereference at virtual address 00000007
printing eip:
d082a17d
*pde = 00000000
Oops: 0000
nfsd af_packet ide-floppy ide-tape ide-cd cdrom floppy keybdev mousedev 3c59x
supermount p80211 hid input usb-uhci usbcore rtc ext3 jbd
CPU: 0
EIP: 0010:[<d082a17d>] Not tainted
EFLAGS: 00010246
EIP is at usb_dump_interface_descriptor+0x2d/0x80 [usbcore]
eax: 00000000 ebx: 00000000 ecx: cf6551e0 edx: d082e8aa
esi: c7eb80cc edi: 00000000 ebp: c9045e48 esp: c9045e3c
ds: 0018 es: 0018 ss: 0018
Process drakconnect (pid: 2030, stackpage=c9045000)
Stack: d082e8aa cf6551e0 00000000 c9045e6c d082a1f5 c7eb80cc c7eb9f00
cf6551e0
00000000 c7eb80cc cf6551e0 00000001 c9045e9c d082a30a 00000001
c7eb80cc
c7eb9f00 cf6551e0 00000000 00000000 00000000 cfedf600 c7eb9f00 00000018
Call Trace:
[<d082e8aa>] .rodata.str1.1+0x5e0/0x6f6 [usbcore]
[<d082a1f5>] usb_dump_interface+0x25/0x70 [usbcore]
[<d082a30a>] usb_dump_config+0x7a/0xc0 [usbcore]
[<d082a591>] usb_dump_desc+0x81/0xa0 [usbcore]
[<d082a6f8>] usb_device_dump+0x148/0x2a0 [usbcore]
[<d082a7f3>] usb_device_dump+0x243/0x2a0 [usbcore]
[<d0833480>] usb_bus_list_lock+0x0/0x10 [usbcore]
[<d082a8e6>] usb_device_read+0x96/0xe0 [usbcore]
[<c020196a>] sys_read+0x7a/0x100 [kernel]
[<c01c4333>] system_call+0x33/0x40 [kernel]
Code: 8a 43 07 50 31 c0 8a 43 06 50 31 c0 8a 43 05 50 e8 ae fd ff
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