| commit | 5731a879d03bdaa00265f8ebc32dfd0e65d25276 | [log] [tgz] |
|---|---|---|
| author | John Fastabend <john.fastabend@gmail.com> | Thu Jan 04 20:02:09 2018 -0800 |
| committer | Daniel Borkmann <daniel@iogearbox.net> | Sun Jan 07 00:01:46 2018 +0100 |
| tree | 3a9d68d5c946353b0f0583e3440655e555826d60 | |
| parent | 5133550296d43236439494aa955bfb765a89f615 [diff] |
bpf: sockmap missing NULL psock check 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> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>