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bpf: tcp: Fix type confusion in sol_tcp_sockopt().

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sol_tcp_sockopt() only checks if sk->sk_protocol is IPPROTO_TCP,
but RAW socket can bypass it:

  socket(AF_INET, SOCK_RAW, IPPROTO_TCP)

Let's use sk_is_tcp().

Note that initially sol_tcp_sockopt() checked sk->sk_prot->setsockopt.

Fixes: 2ab42c7b87 ("bpf: Check the protocol of a sock to agree the calls to bpf_setsockopt().")
Signed-off-by: Kuniyuki Iwashima <kuniyu@google.com>
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Link: https://patch.msgid.link/20260504210610.180150-7-kuniyu@google.com
This commit is contained in:
Kuniyuki Iwashima 2026-05-04 21:04:53 +00:00 committed by Martin KaFai Lau
parent 843064b0a7
commit 1c2958e4ab
1 changed files with 1 additions and 1 deletions
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2
net/core/filter.c
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@ -5481,7 +5481,7 @@ static int sol_tcp_sockopt(struct sock *sk, int optname,
char *optval, int *optlen,
bool getopt)
{
if (sk->sk_protocol != IPPROTO_TCP)
if (!sk_is_tcp(sk))
return -EINVAL;
switch (optname) {