From owner-freebsd-current@FreeBSD.ORG  Wed Oct 26 22:50:47 2005
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Date: Wed, 26 Oct 2005 23:50:44 +0100 (BST)
From: Robert Watson <rwatson@FreeBSD.org>
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To: "Evgueni V. Gavrilov" <aquatique@rusunix.org>
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Cc: freebsd-current@freebsd.org
Subject: Re: 6.0-RC1 crash
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On Wed, 26 Oct 2005, Evgueni V. Gavrilov wrote:

> #11 0xc06b2377 in vm_page_cowsetup (m=0xc106dfb8) at /usr/src/sys/vm/vm_page.c:1696
> No locals.
> #12 0xc05a86eb in socow_setup (m0=0xc8d2d400, uio=0xc7d2b440) at /usr/src/sys/kern/uipc_cow.c:131
> 	sf = (struct sf_buf *) 0x5fe5
> 	pp = 0xc106dfb8
> 	pa = 3238453176
> 	iov = (struct iovec *) 0x4
> 	vmspace = (struct vmspace *) 0xc3acaa80
> 	offset = 1435
> 	uva = 3238453176
> #13 0xc05accec in sosend (so=0xc61ae164, addr=0x0, uio=0xc7d2b440, top=0x0, control=0x0, flags=0, td=0xc3acaa80)
>    at /usr/src/sys/kern/uipc_socket.c:748
> 	mp = (struct mbuf **) 0xeacc4c2c
> 	m = (struct mbuf *) 0xc8d2d400
> 	space = 24549
> 	len = 0
> 	resid = 89551
> 	clen = -925707264
> 	error = 128
> 	dontroute = 0
> 	atomic = 0
> 	cow_send = 0

Looks like you're running into a problem with zero-copy sockets.  A number 
of bug fixes were recently committed that address this problem, but do not 
appear in 6.0-RC1.  Hopefully they'll be in RC2, if not, then in the 
release.

Robert N M Watson