netdev - Re: [PATCH bpf] bpf: Fix use of sk->sk_reuseport from sk

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Date:   Thu, 9 Apr 2020 01:14:01 +0200
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Joe Stringer <joe@...d.net.nz>, bpf@...r.kernel.org
Cc:     netdev@...r.kernel.org, ast@...nel.org
Subject: Re: [PATCH bpf] bpf: Fix use of sk->sk_reuseport from sk_assign

On 4/8/20 5:35 AM, Joe Stringer wrote:
> In testing, we found that for request sockets the sk->sk_reuseport field
> may yet be uninitialized, which caused bpf_sk_assign() to randomly
> succeed or return -ESOCKTNOSUPPORT when handling the forward ACK in a
> three-way handshake.
> 
> Fix it by only applying the reuseport check for full sockets.
> 
> Fixes: cf7fbe660f2d ("bpf: Add socket assign support")
> Signed-off-by: Joe Stringer <joe@...d.net.nz>

Applied, thanks!