The following reply was made to PR port-xen/30153; it has been noted by GNATS.

From: Manuel Bouyer <bouyer@antioche.eu.org>
To: gnats-bugs@NetBSD.org
Cc: port-xen-maintainer@NetBSD.org, gnats-admin@NetBSD.org,
	netbsd-bugs@NetBSD.org
Subject: Re: port-xen/30153: Panic in domU when running a pkgsrc bulk build
Date: Thu, 12 May 2005 22:00:58 +0200

 On Fri, May 06, 2005 at 11:17:00AM +0000, juan@xtrarom.org wrote:
 > >Description:
 > 
 > 	One domU just crashed when running a pkgsrc bulk build
 > 	(60% completed):
 > 
 > panic: HYPERVISOR_mmu_update failed
 > 
 > Stopped in pid 27247.1 (gcc) at netbsd:cpu_Debugger+0x4:        leave
 > cpu_Debugger(c033a025,caecfa78,cbedceec,6,1) at netbsd:cpu_Debugger+0x4
 > panic(c033a940,c04d6cc0,0,0,0) at netbsd:panic+0x12e
 > xpq_flush_queue(0,3,22,c08c0900,2) at netbsd:xpq_flush_queue+0x4a
 > xennet_rx_push_buffer(c099e000,17,c08c0500,c08c0500,c08c0900) at netbsd:xennet_r
 > x_push_buffer+0x9f
 > xennet_rx_mbuf_free(c08c0900,caa1a000,42,c099ef80,0) at netbsd:xennet_rx_mbuf_fr
 > ee+0x2e
 > m_freem(c08c0900,1d0,caa1a022,14,20) at netbsd:m_freem+0x10c
 > tcp_input(c08c0900,14,6,ca1be7b0,caecfc94) at netbsd:tcp_input+0x10cf
 
 I wonder if this could be caused by TCP bugs that were recently fixed.
 I've seen panics in pool_put() with a similar stack trace. A double-free,
 or mbuf corruption in the TCP code could lead to to both panics, depending
 on from where the mbuf comes. Now that these fixes have been pulled up to
 netbsd-3, could you update your kernels, and tell me if this is still
 occuring ?
 
 -- 
 Manuel Bouyer <bouyer@antioche.eu.org>
      NetBSD: 26 ans d'experience feront toujours la difference
 --