Bug 153969

Summary:	kernel panic when removing active USB serial converter used as serial console
Product:	Red Hat Enterprise Linux 3	Reporter:	Richard Horwood <richard_horwood>
Component:	kernel	Assignee:	Dave Jones <davej>
Status:	CLOSED DUPLICATE	QA Contact:	Brian Brock <bbrock>
Severity:	high	Docs Contact:
Priority:	medium
Version:	3.0	CC:	jbaron, petrides, pfrields, riel
Target Milestone:	---
Target Release:	---
Hardware:	ia64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2005-04-06 06:28:41 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Richard Horwood 2005-04-06 06:26:48 UTC

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Description of problem:
Installed a belkin USB to serial converter into system, and set up to work as a serial console for the system.

Kernel recognises the adapter, and serial console works very well.

/etc/inittab contains the line:
cu:2345:respawn:/sbin/agetty -t60 -f /etc/issue.usb 19200 /dev/ttyUSB0

If the USB to serial converter is unplugged when an active agetty is running, the kernel panics.

Version-Release number of selected component (if applicable):
kernel-2.4.21-31.EL

How reproducible:
Always

Steps to Reproduce:
1. Insert USB to serial adapter
2. If not already running, start agetty process on /dev/ttyUSB0 (or whatever tty)
3. unplug USB to serial adapter
  

Actual Results:  System fall down go boom.

Kernel panic, system halted.

Expected Results:  The kernel should recognise the event and bypass any processess attached to that tty

Additional info:

Comment 1 Richard Horwood 2005-04-06 06:28:41 UTC


*** This bug has been marked as a duplicate of 153967 ***