netdev - Re: sctp refcount bug.

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Message-ID: <20170713145656.q3mvzohpzmg2mawe@codemonkey.org.uk>
Date:   Thu, 13 Jul 2017 10:56:56 -0400
From:   Dave Jones <davej@...emonkey.org.uk>
To:     Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
Cc:     netdev@...r.kernel.org, Vlad Yasevich <vyasevich@...il.com>,
        Neil Horman <nhorman@...driver.com>, linux-sctp@...r.kernel.org
Subject: Re: sctp refcount bug.

On Thu, Jul 13, 2017 at 11:38:34AM -0300, Marcelo Ricardo Leitner wrote:
 > On Thu, Jul 13, 2017 at 10:36:39AM -0400, Dave Jones wrote:
 > > Hit this on Linus' current tree.
 > > 
 > > 
 > > refcount_t: underflow; use-after-free.
 > 
 > Any tips on how to reproduce this?

Only seen it once so far. Will see if I can narrow it down if it
reproduces.  It took ~12 hours of fuzzing to find overnight.

	Dave