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authorLawrence Brakmo <brakmo@fb.com>2017-11-10 22:19:51 -0800
committerDavid S. Miller <davem@davemloft.net>2017-11-11 15:52:41 +0900
commit016e661bb0610a98b1c9ac1250e3269236fabe19 (patch)
tree780b77273a09aafc48a4a79c135caf81b37267a2 /samples/bpf/tcp_rwnd_kern.c
parent7863f46bac3a1716f7d547c53f367ddf509f031e (diff)
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>
Diffstat (limited to 'samples/bpf/tcp_rwnd_kern.c')
-rw-r--r--samples/bpf/tcp_rwnd_kern.c6
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;