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Bug 153967

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: kernelAssignee: Dave Jones <davej>
Status: CLOSED DUPLICATE QA Contact: Brian Brock <bbrock>
Severity: high Docs Contact:
Priority: medium    
Version: 3.0CC: 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 06:31:06 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Richard Horwood 2005-04-06 06:12:47 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 06:29:00 UTC
*** Bug 153969 has been marked as a duplicate of this bug. ***

Comment 2 Richard Horwood 2005-04-06 06:31:06 UTC

*** This bug has been marked as a duplicate of 153954 ***