Re: [PATCH bpf v2] xdp: fix race on generic receive path

From: Daniel Borkmann
Date: Mon Jul 08 2019 - 20:13:33 EST

On 07/03/2019 02:09 PM, Ilya Maximets wrote:
> Unlike driver mode, generic xdp receive could be triggered
> by different threads on different CPU cores at the same time
> leading to the fill and rx queue breakage. For example, this
> could happen while sending packets from two processes to the
> first interface of veth pair while the second part of it is
> open with AF_XDP socket.
> Need to take a lock for each generic receive to avoid race.
> Fixes: c497176cb2e4 ("xsk: add Rx receive functions and poll support")
> Signed-off-by: Ilya Maximets <i.maximets@xxxxxxxxxxx>

Applied, thanks!