a6541f4d28
Now that defining trusted fields in a struct is supported, we should add selftests to verify the behavior. This patch adds a few such testcases. Signed-off-by: David Vernet <void@manifault.com> Link: https://lore.kernel.org/r/20230125143816.721952-4-void@manifault.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
33 lines
923 B
C
33 lines
923 B
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2023 Meta Platforms, Inc. and affiliates. */
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#include <vmlinux.h>
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#include <bpf/bpf_tracing.h>
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#include <bpf/bpf_helpers.h>
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#include "bpf_misc.h"
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#include "nested_trust_common.h"
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char _license[] SEC("license") = "GPL";
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/* Prototype for all of the program trace events below:
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*
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* TRACE_EVENT(task_newtask,
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* TP_PROTO(struct task_struct *p, u64 clone_flags)
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*/
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SEC("tp_btf/task_newtask")
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__failure __msg("R2 must be referenced or trusted")
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int BPF_PROG(test_invalid_nested_user_cpus, struct task_struct *task, u64 clone_flags)
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{
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bpf_cpumask_test_cpu(0, task->user_cpus_ptr);
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return 0;
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}
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SEC("tp_btf/task_newtask")
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__failure __msg("R1 must have zero offset when passed to release func or trusted arg to kfunc")
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int BPF_PROG(test_invalid_nested_offset, struct task_struct *task, u64 clone_flags)
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{
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bpf_cpumask_first_zero(&task->cpus_mask);
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return 0;
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}
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