diff options
| author | Lawrence Brakmo <brakmo@fb.com> | 2017-11-11 09:19:52 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-11-11 09:52:41 +0300 |
| commit | a4174f0560f849317239478b1b22afbf03a6eda2 (patch) | |
| tree | 5c633fd9cbee65be8fc2cde131f967bd5c3a93c6 | |
| parent | 016e661bb0610a98b1c9ac1250e3269236fabe19 (diff) | |
| download | linux-a4174f0560f849317239478b1b22afbf03a6eda2.tar.xz | |
bpf: Fix tcp_bufs_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_bufs_kern.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/samples/bpf/tcp_bufs_kern.c b/samples/bpf/tcp_bufs_kern.c index ee83bbabd17c..0566b7fa38a1 100644 --- a/samples/bpf/tcp_bufs_kern.c +++ b/samples/bpf/tcp_bufs_kern.c @@ -41,8 +41,10 @@ int bpf_bufs(struct bpf_sock_ops *skops) * if neither port numberis 55601 */ if (bpf_ntohl(skops->remote_port) != 55601 && - skops->local_port != 55601) - return -1; + skops->local_port != 55601) { + skops->reply = -1; + return 1; + } op = (int) skops->op; @@ -61,8 +63,8 @@ int bpf_bufs(struct bpf_sock_ops *skops) /* Set sndbuf and rcvbuf of active connections */ rv = bpf_setsockopt(skops, SOL_SOCKET, SO_SNDBUF, &bufsize, sizeof(bufsize)); - rv = rv*100 + bpf_setsockopt(skops, SOL_SOCKET, SO_RCVBUF, - &bufsize, sizeof(bufsize)); + rv += bpf_setsockopt(skops, SOL_SOCKET, SO_RCVBUF, + &bufsize, sizeof(bufsize)); break; case BPF_SOCK_OPS_ACTIVE_ESTABLISHED_CB: /* Nothing to do */ @@ -71,8 +73,8 @@ int bpf_bufs(struct bpf_sock_ops *skops) /* Set sndbuf and rcvbuf of passive connections */ rv = bpf_setsockopt(skops, SOL_SOCKET, SO_SNDBUF, &bufsize, sizeof(bufsize)); - rv = rv*100 + bpf_setsockopt(skops, SOL_SOCKET, SO_RCVBUF, - &bufsize, sizeof(bufsize)); + rv += bpf_setsockopt(skops, SOL_SOCKET, SO_RCVBUF, + &bufsize, sizeof(bufsize)); break; default: rv = -1; |