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7042882abc
This adds tests for both the happy path and the error path (with and without the BPF_F_PAD_ZEROS flag). Signed-off-by: Jordan Rome <linux@jordanrome.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20250213152125.1837400-3-linux@jordanrome.com
59 lines
1.6 KiB
C
59 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (C) 2024. Huawei Technologies Co., Ltd */
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#include "test_progs.h"
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#include "read_vsyscall.skel.h"
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#if defined(__x86_64__)
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/* For VSYSCALL_ADDR */
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#include <asm/vsyscall.h>
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#else
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/* To prevent build failure on non-x86 arch */
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#define VSYSCALL_ADDR 0UL
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#endif
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struct read_ret_desc {
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const char *name;
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int ret;
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} all_read[] = {
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{ .name = "probe_read_kernel", .ret = -ERANGE },
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{ .name = "probe_read_kernel_str", .ret = -ERANGE },
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{ .name = "probe_read", .ret = -ERANGE },
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{ .name = "probe_read_str", .ret = -ERANGE },
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{ .name = "probe_read_user", .ret = -EFAULT },
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{ .name = "probe_read_user_str", .ret = -EFAULT },
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{ .name = "copy_from_user", .ret = -EFAULT },
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{ .name = "copy_from_user_task", .ret = -EFAULT },
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{ .name = "copy_from_user_str", .ret = -EFAULT },
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{ .name = "copy_from_user_task_str", .ret = -EFAULT },
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};
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void test_read_vsyscall(void)
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{
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struct read_vsyscall *skel;
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unsigned int i;
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int err;
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#if !defined(__x86_64__)
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test__skip();
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return;
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#endif
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skel = read_vsyscall__open_and_load();
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if (!ASSERT_OK_PTR(skel, "read_vsyscall open_load"))
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return;
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skel->bss->target_pid = getpid();
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err = read_vsyscall__attach(skel);
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if (!ASSERT_EQ(err, 0, "read_vsyscall attach"))
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goto out;
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/* userspace may don't have vsyscall page due to LEGACY_VSYSCALL_NONE,
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* but it doesn't affect the returned error codes.
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*/
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skel->bss->user_ptr = (void *)VSYSCALL_ADDR;
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usleep(1);
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for (i = 0; i < ARRAY_SIZE(all_read); i++)
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ASSERT_EQ(skel->bss->read_ret[i], all_read[i].ret, all_read[i].name);
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out:
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read_vsyscall__destroy(skel);
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}
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