From 016e661bb0610a98b1c9ac1250e3269236fabe19 Mon Sep 17 00:00:00 2001 From: Lawrence Brakmo Date: Fri, 10 Nov 2017 22:19:51 -0800 Subject: 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 Signed-off-by: David S. Miller --- samples/bpf/tcp_rwnd_kern.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'samples') 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; -- cgit