Re: [bpf-net PATCH v2] bpf: sockmap missing NULL psock check

On 01/05/2018 05:02 AM, John Fastabend wrote:

Add psock NULL check to handle a racing sock event that can get the
sk_callback_lock before this case but after xchg happens causing the
refcnt to hit zero and sock user data (psock) to be null and queued
for garbage collection.

Also add a comment in the code because this is a bit subtle and
not obvious in my opinion.

Signed-off-by: John Fastabend <john.fastabend@gmail.com>

Applied to bpf, thanks John!