| 1 | // SPDX-License-Identifier: GPL-2.0 |
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| 2 | |
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| 3 | #include "vmlinux.h" |
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| 4 | #include <bpf/bpf_tracing.h> |
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| 5 | #include <bpf/bpf_helpers.h> |
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| 6 | |
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| 7 | #include "bpf_misc.h" |
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| 8 | |
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| 9 | char _license[] SEC("license" ) = "GPL" ; |
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| 10 | |
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| 11 | int bpf_sock_destroy(struct sock_common *sk) __ksym; |
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| 12 | |
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| 13 | SEC("tp_btf/tcp_destroy_sock" ) |
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| 14 | __failure __msg("calling kernel function bpf_sock_destroy is not allowed" ) |
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| 15 | int BPF_PROG(trace_tcp_destroy_sock, struct sock *sk) |
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| 16 | { |
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| 17 | /* should not load */ |
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| 18 | bpf_sock_destroy((struct sock_common *)sk); |
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| 19 | |
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| 20 | return 0; |
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| 21 | } |
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| 22 | |
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| 23 | |
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