[comp.bugs.4bsd] bug in ptrace

norbert@ifistg.UUCP (04/23/87)

Our system dies really often with 'panic: munhash' if we want to debug a
process with dbx or adb. We have a VAX 11-780 running 4.2bsd.
The stack trace from the post-mortem dump looks like this:

	...
	_panic(8003259e) from 8000b93a
	_munhash(907,fffb89e2) from 80019dd5
	_chgprot(91,20000000) from 80021097
	_procxmt() from	8000d2db
	_issig() from 8000a6f4
	...

I hope that this is a well-known bug and somebody can help us.

Thanks in advance,
				Norbert Jung
				University of Stuttgart
				...!seismo!unido!ifistg!norbert