Commit f3b8c28135c3 for kernel

commit f3b8c28135c339e6993ffb79579447a109537a11
Merge: 0c7ae130698e 1c2958e4ab1e
Author: Martin KaFai Lau <martin.lau@kernel.org>
Date:   Fri May 8 09:55:33 2026 -0700

    Merge branch 'bpf-tcp-fix-type-confusion-in-bpf-helper-functions'

    Kuniyuki Iwashima says:

    ====================
    bpf: tcp: Fix type confusion in bpf helper functions.

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

      socket(AF_INET, SOCK_RAW, IPPROTO_TCP)

    The same issues exist in other bpf functions:

      * bpf_mptcp_sock_from_subflow()
      * bpf_skc_to_tcp_sock()
      * bpf_skc_to_tcp6_sock()
      * sol_tcp_sockopt()

    Patch 1 fixes bpf_tcp_sock() and Patch 2 adds a test for it.
    Patch 3 ~ 6 fix the rest of the functions above.

    Changes:
      v2:
        * Inverse if (err) to if (!err) in the selftest
        * Add patch 3 ~ 6

      v1: https://lore.kernel.org/bpf/20260430184405.1227386-1-kuniyu@google.com/
          https://lore.kernel.org/mptcp/20260430-mptcp-bpf-mptcp-sock-type-v1-1-d2ed5cda7da9@kernel.org/
    ====================

    Link: https://patch.msgid.link/20260504210610.180150-1-kuniyu@google.com
    Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>