From: Eric Dumazet <[email protected]> Date: Wed, 01 Feb 2017 08:33:53 -0800
> From: Eric Dumazet <[email protected]> > > syszkaller fuzzer was able to trigger a divide by zero, when > TCP window scaling is not enabled. > > SO_RCVBUF can be used not only to increase sk_rcvbuf, also > to decrease it below current receive buffers utilization. > > If mss is negative or 0, just return a zero TCP window. > > Signed-off-by: Eric Dumazet <[email protected]> > Reported-by: Dmitry Vyukov <[email protected]> > --- > No Fixes: tag, this is a day-0 bug. Applied and queued up for -stable, thanks Eric.
