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ecce368d6e
Add a test to ensure that bpf_lookup_user_key() creates a referenced special keyring when the KEY_LOOKUP_CREATE flag is passed to this function. Ensure that the kfunc rejects invalid flags. Ensure that a keyring can be obtained from bpf_lookup_system_key() when one of the pre-determined keyring IDs is provided. The test is currently blacklisted for s390x (JIT does not support calling kernel function). Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com> Link: https://lore.kernel.org/r/20220920075951.929132-12-roberto.sassu@huaweicloud.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
112 lines
2.7 KiB
C
112 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2022 Huawei Technologies Duesseldorf GmbH
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*
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* Author: Roberto Sassu <roberto.sassu@huawei.com>
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*/
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#include <linux/keyctl.h>
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#include <test_progs.h>
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#include "test_lookup_key.skel.h"
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#define KEY_LOOKUP_CREATE 0x01
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#define KEY_LOOKUP_PARTIAL 0x02
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static bool kfunc_not_supported;
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static int libbpf_print_cb(enum libbpf_print_level level, const char *fmt,
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va_list args)
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{
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char *func;
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if (strcmp(fmt, "libbpf: extern (func ksym) '%s': not found in kernel or module BTFs\n"))
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return 0;
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func = va_arg(args, char *);
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if (strcmp(func, "bpf_lookup_user_key") && strcmp(func, "bpf_key_put") &&
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strcmp(func, "bpf_lookup_system_key"))
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return 0;
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kfunc_not_supported = true;
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return 0;
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}
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void test_lookup_key(void)
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{
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libbpf_print_fn_t old_print_cb;
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struct test_lookup_key *skel;
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__u32 next_id;
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int ret;
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skel = test_lookup_key__open();
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if (!ASSERT_OK_PTR(skel, "test_lookup_key__open"))
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return;
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old_print_cb = libbpf_set_print(libbpf_print_cb);
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ret = test_lookup_key__load(skel);
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libbpf_set_print(old_print_cb);
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if (ret < 0 && kfunc_not_supported) {
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printf("%s:SKIP:bpf_lookup_*_key(), bpf_key_put() kfuncs not supported\n",
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__func__);
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test__skip();
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goto close_prog;
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}
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if (!ASSERT_OK(ret, "test_lookup_key__load"))
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goto close_prog;
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ret = test_lookup_key__attach(skel);
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if (!ASSERT_OK(ret, "test_lookup_key__attach"))
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goto close_prog;
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skel->bss->monitored_pid = getpid();
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skel->bss->key_serial = KEY_SPEC_THREAD_KEYRING;
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/* The thread-specific keyring does not exist, this test fails. */
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skel->bss->flags = 0;
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ret = bpf_prog_get_next_id(0, &next_id);
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if (!ASSERT_LT(ret, 0, "bpf_prog_get_next_id"))
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goto close_prog;
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/* Force creation of the thread-specific keyring, this test succeeds. */
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skel->bss->flags = KEY_LOOKUP_CREATE;
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ret = bpf_prog_get_next_id(0, &next_id);
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if (!ASSERT_OK(ret, "bpf_prog_get_next_id"))
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goto close_prog;
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/* Pass both lookup flags for parameter validation. */
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skel->bss->flags = KEY_LOOKUP_CREATE | KEY_LOOKUP_PARTIAL;
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ret = bpf_prog_get_next_id(0, &next_id);
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if (!ASSERT_OK(ret, "bpf_prog_get_next_id"))
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goto close_prog;
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/* Pass invalid flags. */
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skel->bss->flags = UINT64_MAX;
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ret = bpf_prog_get_next_id(0, &next_id);
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if (!ASSERT_LT(ret, 0, "bpf_prog_get_next_id"))
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goto close_prog;
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skel->bss->key_serial = 0;
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skel->bss->key_id = 1;
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ret = bpf_prog_get_next_id(0, &next_id);
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if (!ASSERT_OK(ret, "bpf_prog_get_next_id"))
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goto close_prog;
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skel->bss->key_id = UINT32_MAX;
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ret = bpf_prog_get_next_id(0, &next_id);
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ASSERT_LT(ret, 0, "bpf_prog_get_next_id");
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close_prog:
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skel->bss->monitored_pid = 0;
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test_lookup_key__destroy(skel);
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}
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