Subject: Re: squid now reveals a new kernel problem.
To: NetBSD Kernel Technical Discussion List <tech-kern@NetBSD.ORG>
From: Charles M. Hannum <>
List: tech-kern
Date: 10/28/1999 16:44:16 (Greg A. Woods) writes:

> This is NetBSD-1.3.3 with the sys_accept() patch I posted, as well as
> [...]
> Ever since trying either the original patch suggested by Darren, or my
> patch using ffree() instead of closef() the kernel has been reporting
> various numbers (about 80 yesterday, then only about 9 before the crash)
> of messages like the following just as squid does its log rotation:

I don't see what's surprising about this.  fdalloc() put the struct
file (`fp') into the process's file descriptor table, but your ffree()
call did not remove it.  Any future operation on that file descriptor
-- including cleanup during process exit -- will thus walk a stale

You should have used fdrelease() instead.

I'm quite disturbed that such a change was made without actually
testing it prior to commit.