f0a5056222
Add a test validating that freplace'ing another main (entry) BPF program fails if the target BPF program doesn't have valid/expected func proto BTF. We extend fexit_bpf2bpf test to allow to specify expected log message for negative test cases (where freplace program is expected to fail to load). Acked-by: Eduard Zingerman <eddyz87@gmail.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/r/20231215011334.2307144-11-andrii@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>
20 lines
612 B
C
20 lines
612 B
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright (c) 2020 Facebook
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#include "vmlinux.h"
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#include <bpf/bpf_helpers.h>
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#include <bpf/bpf_tracing.h>
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SEC("freplace/btf_unreliable_kprobe")
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/* context type is what BPF verifier expects for kprobe context, but target
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* program has `stuct whatever *ctx` argument, so freplace operation will be
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* rejected with the following message:
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*
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* arg0 replace_btf_unreliable_kprobe(struct pt_regs *) doesn't match btf_unreliable_kprobe(struct whatever *)
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*/
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int replace_btf_unreliable_kprobe(bpf_user_pt_regs_t *ctx)
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{
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return 0;
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}
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char _license[] SEC("license") = "GPL";
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