diff options
| author |   Lorenz Bauer <lmb@cloudflare.com> | 2020-06-29 10:56:27 +0100 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2020-06-30 10:46:39 -0700 |
| commit | 9b2b09717e1812e450782a43ca0c2790651cf380 (patch) | |
| tree | 335fdf3b51260b4b2445c736b9ca24899b181bcd /net | |
| parent | bpf: flow_dissector: Check value of unused flags to BPF_PROG_DETACH (diff) | |
| download | wireguard-linux-9b2b09717e1812e450782a43ca0c2790651cf380.tar.xz wireguard-linux-9b2b09717e1812e450782a43ca0c2790651cf380.zip | |
bpf: sockmap: Check value of unused args to BPF_PROG_ATTACH
Using BPF_PROG_ATTACH on a sockmap program currently understands no
flags or replace_bpf_fd, but accepts any value. Return EINVAL instead.
Fixes: 604326b41a6f ("bpf, sockmap: convert to generic sk_msg interface")
Signed-off-by: Lorenz Bauer <lmb@cloudflare.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200629095630.7933-4-lmb@cloudflare.com
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/sock_map.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/core/sock_map.c b/net/core/sock_map.c index 4059f94e9bb5..58016a5c63ff 100644 --- a/net/core/sock_map.c +++ b/net/core/sock_map.c @@ -70,6 +70,9 @@ int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog) struct fd f; int ret; + if (attr->attach_flags || attr->replace_bpf_fd) + return -EINVAL; + f = fdget(ufd); map = __bpf_map_get(f); if (IS_ERR(map)) |