Bug 155392

Summary:	Slab corruption when unplugging cp2101 USB-serial converter.
Product:	[openSUSE] SUSE Linux 10.1	Reporter:	Forgotten User ZhJd0F0L3x <forgotten_ZhJd0F0L3x>
Component:	Kernel	Assignee:	Greg Kroah-Hartman <gregkh>
Status:	RESOLVED FIXED	QA Contact:	E-mail List <qa-bugs>
Severity:	Major
Priority:	P5 - None
Version:	Beta 6
Target Milestone:	---
Hardware:	Other
OS:	Other
Whiteboard:
Found By:	Component Test	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---
Bug Depends on:
Bug Blocks:	140732

Description Forgotten User ZhJd0F0L3x 2006-03-06 13:16:52 UTC

plug in cp2101 device,
cat /dev/ttyUSB0
unplug device

usb 1-1: new full speed USB device using uhci_hcd and address 6
usb 1-1: new device found, idVendor=10ab, idProduct=10c5
usb 1-1: new device strings: Mfr=1, Product=2, SerialNumber=3
usb 1-1: Product: usb data cable
usb 1-1: Manufacturer: Silicon Labs
usb 1-1: SerialNumber: 0001
usb 1-1: configuration #1 chosen from 1 choice
cp2101 1-1:1.0: cp2101 converter detected
usb 1-1: reset full speed USB device using uhci_hcd and address 6
usb 1-1: cp2101 converter now attached to ttyUSB0
usb 1-1: USB disconnect, address 6
cp2101 1-1:1.0: device disconnected
cp2101 ttyUSB0: cp2101_set_config - Unable to send request, request=0x0 size=2 result=-19
cp2101 ttyUSB0: cp2101 converter now disconnected from ttyUSB0
Slab corruption: start=c2131a04, len=1024
Redzone: 0x5a2cf071/0x5a2cf071.
Last user: [<c020a41e>](device_release+0x14/0x41)
010: 6b 6b 6b 6b 6b 6b 6b 6b 6c 6b 6b 6b 6b 6b 6b 6b
Prev obj: start=c21315f8, len=1024
Redzone: 0x5a2cf071/0x5a2cf071.
Last user: [<c022fe1f>](kfree_skbmem+0x8/0x5f)
000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
010: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b

Comment 1 Olaf Kirch 2006-03-06 14:42:14 UTC

*** Bug 155398 has been marked as a duplicate of this bug. ***

Comment 2 Olaf Kirch 2006-03-06 15:19:57 UTC

Greg, this is for you I guess

Comment 3 Greg Kroah-Hartman 2006-03-06 20:56:08 UTC

Different device, yes, but the bug is in the usb-serial core, as I can duplicate
this here with different devices...

Comment 4 Greg Kroah-Hartman 2006-03-06 21:26:44 UTC

bug found, and is being checked into kernel cvs.