From: Lorenz Bauer <lmb@cloudflare.com>
To: ast@kernel.org, daniel@iogearbox.net, sdf@google.com,
jakub@cloudflare.com, john.fastabend@gmail.com
Cc: kernel-team@cloudflare.com, bpf@vger.kernel.org,
Lorenz Bauer <lmb@cloudflare.com>
Subject: [PATCH bpf v2 3/6] bpf: sockmap: check value of unused args to BPF_PROG_ATTACH
Date: Mon, 29 Jun 2020 10:56:27 +0100 [thread overview]
Message-ID: <20200629095630.7933-4-lmb@cloudflare.com> (raw)
In-Reply-To: <20200629095630.7933-1-lmb@cloudflare.com>
Using BPF_PROG_ATTACH on a sockmap program currently understands no
flags or replace_bpf_fd, but accepts any value. Return EINVAL instead.
Signed-off-by: Lorenz Bauer <lmb@cloudflare.com>
Fixes: 604326b41a6f ("bpf, sockmap: convert to generic sk_msg interface")
---
net/core/sock_map.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/net/core/sock_map.c b/net/core/sock_map.c
index 4c1123c749bb..db45c1453d39 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))
--
2.25.1
next prev parent reply other threads:[~2020-06-29 21:03 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-29 9:56 [PATCH bpf v2 0/6] Fix attach / detach uapi for sockmap and flow_dissector Lorenz Bauer
2020-06-29 9:56 ` [PATCH bpf v2 1/6] bpf: flow_dissector: check value of unused flags to BPF_PROG_ATTACH Lorenz Bauer
2020-11-04 18:08 ` Jiri Benc
2020-11-05 11:00 ` Lorenz Bauer
2020-11-05 11:08 ` Jiri Benc
2020-11-05 16:04 ` Stanislav Fomichev
2020-06-29 9:56 ` [PATCH bpf v2 2/6] bpf: flow_dissector: check value of unused flags to BPF_PROG_DETACH Lorenz Bauer
2020-06-29 9:56 ` Lorenz Bauer [this message]
2020-06-29 9:56 ` [PATCH bpf v2 4/6] bpf: sockmap: require attach_bpf_fd when detaching a program Lorenz Bauer
2020-07-08 1:30 ` Martin KaFai Lau
2020-06-29 9:56 ` [PATCH bpf v2 5/6] selftests: bpf: pass program and target_fd in flow_dissector_reattach Lorenz Bauer
2020-06-29 9:56 ` [PATCH bpf v2 6/6] selftests: bpf: pass program to bpf_prog_detach in flow_dissector Lorenz Bauer
2020-06-30 5:48 ` [PATCH bpf v2 0/6] Fix attach / detach uapi for sockmap and flow_dissector Yonghong Song
2020-06-30 8:39 ` Lorenz Bauer
2020-06-30 15:08 ` Yonghong Song
2020-06-30 15:50 ` Lorenz Bauer
2020-06-30 18:00 ` Alexei Starovoitov
2020-06-30 18:31 ` Jakub Sitnicki
2020-06-30 18:42 ` Alexei Starovoitov
2020-07-01 7:45 ` Jakub Sitnicki
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