On Mon, 2015-11-16 at 16:25 +0100, Hannes Frederic Sowa wrote: > In case multiple writes to a unix stream socket race we could end up in a > situation where we pre-allocate a new skb for use in unix_stream_sendpage > but have to free it again in the locked section because another skb > has been appended meanwhile, which we must use. Accidentally we didn't > clear the pointer after consuming it and so we touched freed memory > while appending it to the sk_receive_queue. So, clear the pointer after > consuming the skb. > > This bug has been found with syzkaller > (http://github.com/google/syzkaller) by Dmitry Vyukov. > > Fixes: 869e7c62486e ("net: af_unix: implement stream sendpage support") > Reported-by: Dmitry Vyukov <dvyu...@google.com> > Cc: Dmitry Vyukov <dvyu...@google.com> > Cc: Eric Dumazet <eric.duma...@gmail.com> > Signed-off-by: Hannes Frederic Sowa <han...@stressinduktion.org> > ---
Acked-by: Eric Dumazet <eduma...@google.com> -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
