Bug 153969 - kernel panic when removing active USB serial converter used as serial console
kernel panic when removing active USB serial converter used as serial console
Status: CLOSED DUPLICATE of bug 153967
Product: Red Hat Enterprise Linux 3
Classification: Red Hat
Component: kernel (Show other bugs)
3.0
ia64 Linux
medium Severity high
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Assigned To: Dave Jones
Brian Brock
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Depends On:
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Reported: 2005-04-06 02:26 EDT by Richard Horwood
Modified: 2015-01-04 17:18 EST (History)
4 users (show)

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Doc Type: Bug Fix
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Last Closed: 2005-04-06 02:28:41 EDT
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Description Richard Horwood 2005-04-06 02:26:48 EDT
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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 02:28:41 EDT

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

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