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DragonFly kernel List (threaded) for 2005-09
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Re: kernel: mfree: m->m_nextpkt != NULL

From: Jeroen Ruigrok/asmodai <asmodai@xxxxxxxxxxxxx>
Date: Tue, 20 Sep 2005 11:09:47 +0200

-On [20050920 10:02], Dave Hayes (dave@xxxxxxxxxxx) wrote:
>What does this Subject mean? 

I am by no means a network stack guru, but it seems mfree was trying to free
a mbuf cluster, but it still has a next packet/cluster pointer, meaning that
it has a child and thus it is unacceptable to free it.

I think it comes from:


one of the two KKASSERT(m->m_nextpkt == NULL);

Meaning it tripped either in sbappendstream() or sbappendaddr().

So that means there's still a code path somewhere that comes to either of
these functions with a chained mbuf.

But that's my reading of it.

Jeroen Ruigrok van der Werven <asmodai(at)wxs.nl> / asmodai / kita no mono
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