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| author |   John Fastabend <john.fastabend@gmail.com> | 2018-01-04 20:02:09 -0800 |
|---|---|---|
| committer |   Daniel Borkmann <daniel@iogearbox.net> | 2018-01-07 00:01:46 +0100 |
| commit | 5731a879d03bdaa00265f8ebc32dfd0e65d25276 (patch) | |
| tree | 3a9d68d5c946353b0f0583e3440655e555826d60 /tools/testing/selftests/bpf/test_align.c | |
| parent | sh_eth: fix SH7757 GEther initialization (diff) | |
| download | linux-dev-5731a879d03bdaa00265f8ebc32dfd0e65d25276.tar.xz linux-dev-5731a879d03bdaa00265f8ebc32dfd0e65d25276.zip | |
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>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions