From owner-freebsd-security  Sun Feb  3 18:44:14 2002
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Date: Sun, 3 Feb 2002 21:43:57 -0500 (EST)
From: Ralph Huntington <rjh@mohawk.net>
To: Mike Silbersack <silby@silby.com>
Cc: Jason Stone <jason@shalott.net>, <freebsd-security@FreeBSD.ORG>
Subject: Re: crashs on 4.5RC
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Gentlemen, this is not a security issue. Please take it to the appropriate
list. Please. Thank you.	;-)

On Sun, 3 Feb 2002, Mike Silbersack wrote:

>
> On Sun, 3 Feb 2002, Jason Stone wrote:
>
> > The last messages in my logs before the box went down were:
> >
> > Feb  2 11:47:28 walter /kernel: m_retry failed, consider increase mbuf value
> > Feb  2 11:47:28 walter /kernel: m_retryhdr failed, consider increase mbuf value
> > Feb  2 11:47:29 walter /kernel: fxp0: mbuf allocation failed, packet dropped!
> > Feb  2 11:47:29 walter last message repeated 15 times
> >
> > So my question is, is it possible to panic and crash a FreeBSD box by
> > overflowing its nmbclusters?
> >
> >  -Jason
>
> In theory, no.  However, if there's a piece of code which doesn't expect
> to have mbuf allocations ever fail, then a panic and crash could very well
> occur.  Also, network connections failing could cause a userland app to
> start acting really strange.
>
> So, we'd need more information to really know.
>
> Mike "Silby" Silbersack
>
>
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