6.0_BETA crash during reboot after modifying network settings

[Mayuresh <mayuresh%acm.org@localhost>]

Following is the message I saw in ddb:

panic: kernel diagnostic assertion "l->l_pflag & LP_INTR)==0" failed:
faile "/usr/src/sys/kern/kern_Synch.c", line 187.

I am not sure about reproducibility of this. I did the actions mentioned
in the subject line.

BTW: I do not know how to save ddb trace on disk. I wrote it on a paper
and typed out above.

Mayuresh