Re: [PATCH v4.4.y..v4.14.y] tcp: avoid integer overflows in tcp_rcv_space_adjust()

On Wed, May 30, 2018 at 01:36:05PM -0700, Guenter Roeck wrote:

From: Eric Dumazet edumazet@google.com

commit 607065bad9931e72207b0cac365d7d4abc06bd99 upstream.

When using large tcp_rmem[2] values (I did tests with 500 MB), I noticed overflows while computing rcvwin.

Lets fix this before the following patch.

Signed-off-by: Eric Dumazet edumazet@google.com Acked-by: Soheil Hassas Yeganeh soheil@google.com Acked-by: Wei Wang weiwan@google.com Acked-by: Neal Cardwell ncardwell@google.com Signed-off-by: David S. Miller davem@davemloft.net [Backport: sysctl_tcp_rmem is not Namespace-ify'd in older kernels] Signed-off-by: Guenter Roeck linux@roeck-us.net

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Applies cleanly to v4.4.y and v4.9.y; v4.14.y needs "git am -3".

Now queued up, thanks.

greg k-h