diff options
| author | Lawrence Brakmo <brakmo@fb.com> | 2017-11-11 09:19:51 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-11-11 09:52:41 +0300 |
| commit | 016e661bb0610a98b1c9ac1250e3269236fabe19 (patch) | |
| tree | 780b77273a09aafc48a4a79c135caf81b37267a2 | |
| parent | 7863f46bac3a1716f7d547c53f367ddf509f031e (diff) | |
| download | linux-016e661bb0610a98b1c9ac1250e3269236fabe19.tar.xz | |
bpf: Fix tcp_rwnd_kern.c sample program
The program was returning -1 in some cases which is not allowed
by the verifier any longer.
Fixes: 390ee7e29fc8 ("bpf: enforce return code for cgroup-bpf programs")
Signed-off-by: Lawrence Brakmo <brakmo@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | samples/bpf/tcp_rwnd_kern.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/samples/bpf/tcp_rwnd_kern.c b/samples/bpf/tcp_rwnd_kern.c index 3f2a228f81ce..09ff65b40b31 100644 --- a/samples/bpf/tcp_rwnd_kern.c +++ b/samples/bpf/tcp_rwnd_kern.c @@ -38,8 +38,10 @@ int bpf_rwnd(struct bpf_sock_ops *skops) * if neither port numberis 55601 */ if (bpf_ntohl(skops->remote_port) != - 55601 && skops->local_port != 55601) - return -1; + 55601 && skops->local_port != 55601) { + skops->reply = -1; + return 1; + } op = (int) skops->op; |