Date: Wed, 21 Nov 2001 17:59:09 +0000 From: Ian Dowse <iedowse@maths.tcd.ie> To: Rudi Mathijssen <R.Mathijssen@iris-ict.nl> Cc: "'freebsd-net@FreeBSD.org'" <freebsd-net@FreeBSD.org> Subject: Re: kernel backtrace for kern/28844 Message-ID: <200111211759.aa36148@salmon.maths.tcd.ie> In-Reply-To: Your message of "Wed, 21 Nov 2001 17:14:59 %2B0100." <8BA878388251D311B08200508B449FD10D0E3F4A@BEHDEVEX1>
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In message <8BA878388251D311B08200508B449FD10D0E3F4A@BEHDEVEX1>, Rudi Mathijsse n writes: >--- >Fatal trap 12: page fault while in kernel mode >fault virtual address = 0x79c02812 This is caused by a bug in ip_icmp.c relating to the generation of ICMP redirect messages that was fixed just before 4.3-RELEASE. The problem will go away if you upgrade to a more recent release. I can be almost 100% certain that this particular bug is the cause of your crashes because of the virtual address above. The bug caused the two most significant bytes of the mbuf mh_next pointer to get swapped, so a valid address 0xc0792812 got changed to 0x79c02812. It's a pity that not all bugs have such distinctive signatures :-) Ian To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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