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Date:      Sun, 13 Sep 2009 02:04:52 +0100
From:      Bruce Simpson <bms@incunabulum.net>
To:        freebsd-gnats-submit@FreeBSD.org
Cc:        freebsd-net@FreeBSD.org
Subject:   Re: kern/138666: [multicast] [panic] not working multicast through igmpproxy
Message-ID:  <4AAC4534.9040606@incunabulum.net>
In-Reply-To: <200909091921.n89JL2wr014985@freefall.freebsd.org>
References:  <200909091921.n89JL2wr014985@freefall.freebsd.org>

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I did a quick pass over ip_mroute.c to see if I could have introduced 
any obvious errors during refactoring; didn't see anything obvious.

The backtrace which was posted points towards a trashed rte->m pointer, 
assuming it's accurate and the arguments didn't get trashed on-stack. 
The MFC lock should be held in expire_mfc(). I'll add a lock assertion 
there for now. The VIF lock shouldn't be needed in this path.



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