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d463dd9c9a
Add test for lsm tail call to ensure tail call can only be used between bpf lsm progs attached to the same hook. Signed-off-by: Xu Kuohai <xukuohai@huawei.com> Link: https://lore.kernel.org/r/20240719110059.797546-9-xukuohai@huaweicloud.com Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
34 lines
681 B
C
34 lines
681 B
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2024 Huawei Technologies Co., Ltd */
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#include "vmlinux.h"
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#include <errno.h>
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#include <bpf/bpf_helpers.h>
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char _license[] SEC("license") = "GPL";
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struct {
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__uint(type, BPF_MAP_TYPE_PROG_ARRAY);
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__uint(max_entries, 1);
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__uint(key_size, sizeof(__u32));
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__uint(value_size, sizeof(__u32));
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} jmp_table SEC(".maps");
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SEC("lsm/file_permission")
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int lsm_file_permission_prog(void *ctx)
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{
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return 0;
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}
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SEC("lsm/file_alloc_security")
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int lsm_file_alloc_security_prog(void *ctx)
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{
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return 0;
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}
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SEC("lsm/file_alloc_security")
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int lsm_file_alloc_security_entry(void *ctx)
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{
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bpf_tail_call_static(ctx, &jmp_table, 0);
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return 0;
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}
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