From 4617721c502b2ddaa4e324e86da4997edf738fa5 Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Wed, 2 Sep 2026 09:55:01 -0400 Subject: ftrace: Synchronize the initialization of ftrace_ops There's some internal state that ftrace_ops needs to have set, but since it can be declared outside of the ftrace.c code, it calls ftrace_ops_init() on the ops in every global function. The issue is that if two tasks call it on the same ops at the same time it is possible to have the initialization of one corrupt the initialization of the other call. Create a ops_mutex to use to synchronize every initialization of the ftrace_ops. The mutex is taken within checking the ftrace_ops flag that states it was initializied but the flag is checked again after the mutex has been taken. Checking first outside the mutex allows it to shortcut having to take the mutex. But then the check needs to be done again after the mute is taken in case of races. Cc: stable@vger.kernel.org Link: https://patch.msgid.link/20260902095501.6b59af20@gandalf.local.home Fixes: f04f24fb7e48d ("ftrace, kprobes: Fix a deadlock on ftrace_regex_lock") Reported-by: sashiko-bot@kernel.org Close: https://lore.kernel.org/all/20260829025528.49A831F000E9@smtp.kernel.org/ Signed-off-by: Steven Rostedt --- security/ipe/policy_tests.c | 297 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 297 insertions(+) create mode 100644 security/ipe/policy_tests.c (limited to 'security/ipe/policy_tests.c') diff --git a/security/ipe/policy_tests.c b/security/ipe/policy_tests.c new file mode 100644 index 000000000..5f1654dee --- /dev/null +++ b/security/ipe/policy_tests.c @@ -0,0 +1,297 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2020-2024 Microsoft Corporation. All rights reserved. + */ + +#include +#include +#include +#include +#include "policy.h" +struct policy_case { + const char *const policy; + int errno; + const char *const desc; +}; + +static const struct policy_case policy_cases[] = { + { + "policy_name=allowall policy_version=0.0.0\n" + "DEFAULT action=ALLOW", + 0, + "basic", + }, + { + "policy_name=trailing_comment policy_version=152.0.0 #This is comment\n" + "DEFAULT action=ALLOW", + 0, + "trailing comment", + }, + { + "policy_name=allowallnewline policy_version=0.2.0\n" + "DEFAULT action=ALLOW\n" + "\n", + 0, + "trailing newline", + }, + { + "policy_name=carriagereturnlinefeed policy_version=0.0.1\n" + "DEFAULT action=ALLOW\n" + "\r\n", + 0, + "clrf newline", + }, + { + "policy_name=whitespace policy_version=0.0.0\n" + "DEFAULT\taction=ALLOW\n" + " \t DEFAULT \t op=EXECUTE action=DENY\n" + "op=EXECUTE boot_verified=TRUE action=ALLOW\n" + "# this is a\tcomment\t\t\t\t\n" + "DEFAULT \t op=KMODULE\t\t\t action=DENY\r\n" + "op=KMODULE boot_verified=TRUE action=ALLOW\n", + 0, + "various whitespaces and nested default", + }, + { + "policy_name=boot_verified policy_version=-1236.0.0\n" + "DEFAULT\taction=ALLOW\n", + -EINVAL, + "negative version", + }, + { + "policy_name=$@!*&^%%\\:;{}() policy_version=0.0.0\n" + "DEFAULT action=ALLOW", + 0, + "special characters", + }, + { + "policy_name=test policy_version=999999.0.0\n" + "DEFAULT action=ALLOW", + -ERANGE, + "overflow version", + }, + { + "policy_name=test policy_version=255.0\n" + "DEFAULT action=ALLOW", + -EBADMSG, + "incomplete version", + }, + { + "policy_name=test policy_version=111.0.0.0\n" + "DEFAULT action=ALLOW", + -EBADMSG, + "extra version", + }, + { + "", + -EBADMSG, + "0-length policy", + }, + { + "policy_name=test\0policy_version=0.0.0\n" + "DEFAULT action=ALLOW", + -EBADMSG, + "random null in header", + }, + { + "policy_name=test policy_version=0.0.0\n" + "\0DEFAULT action=ALLOW", + -EBADMSG, + "incomplete policy from NULL", + }, + { + "policy_name=test policy_version=0.0.0\n" + "DEFAULT action=DENY\n\0" + "op=EXECUTE dmverity_signature=TRUE action=ALLOW\n", + 0, + "NULL truncates policy", + }, + { + "policy_name=test policy_version=0.0.0\n" + "DEFAULT action=ALLOW\n" + "op=EXECUTE dmverity_signature=abc action=ALLOW", + -EBADMSG, + "invalid property type", + }, + { + "DEFAULT action=ALLOW", + -EBADMSG, + "missing policy header", + }, + { + "policy_name=test policy_version=0.0.0\n", + -EBADMSG, + "missing default definition", + }, + { + "policy_name=test policy_version=0.0.0\n" + "DEFAULT action=ALLOW\n" + "dmverity_signature=TRUE op=EXECUTE action=ALLOW", + -EBADMSG, + "invalid rule ordering" + }, + { + "policy_name=test policy_version=0.0.0\n" + "DEFAULT action=ALLOW\n" + "action=ALLOW op=EXECUTE dmverity_signature=TRUE", + -EBADMSG, + "invalid rule ordering (2)", + }, + { + "policy_name=test policy_version=0.0\n" + "DEFAULT action=ALLOW\n" + "op=EXECUTE dmverity_signature=TRUE action=ALLOW", + -EBADMSG, + "invalid version", + }, + { + "policy_name=test policy_version=0.0.0\n" + "DEFAULT action=ALLOW\n" + "op=UNKNOWN dmverity_signature=TRUE action=ALLOW", + -EBADMSG, + "unknown operation", + }, + { + "policy_name=asdvpolicy_version=0.0.0\n" + "DEFAULT action=ALLOW\n", + -EBADMSG, + "missing space after policy name", + }, + { + "policy_name=test\xFF\xEF policy_version=0.0.0\n" + "DEFAULT action=ALLOW\n" + "op=EXECUTE dmverity_signature=TRUE action=ALLOW", + 0, + "expanded ascii", + }, + { + "policy_name=test\xFF\xEF policy_version=0.0.0\n" + "DEFAULT action=ALLOW\n" + "op=EXECUTE dmverity_roothash=GOOD_DOG action=ALLOW", + -EBADMSG, + "invalid property value (2)", + }, + { + "policy_name=test policy_version=0.0.0\n" + "policy_name=test policy_version=0.1.0\n" + "DEFAULT action=ALLOW", + -EBADMSG, + "double header" + }, + { + "policy_name=test policy_version=0.0.0\n" + "DEFAULT action=ALLOW\n" + "DEFAULT action=ALLOW\n", + -EBADMSG, + "double default" + }, + { + "policy_name=test policy_version=0.0.0\n" + "DEFAULT action=ALLOW\n" + "DEFAULT op=EXECUTE action=DENY\n" + "DEFAULT op=EXECUTE action=ALLOW\n", + -EBADMSG, + "double operation default" + }, + { + "policy_name=test policy_version=0.0.0\n" + "DEFAULT action=ALLOW\n" + "DEFAULT op=EXECUTE action=DEN\n", + -EBADMSG, + "invalid action value" + }, + { + "policy_name=test policy_version=0.0.0\n" + "DEFAULT action=ALLOW\n" + "DEFAULT op=EXECUTE action\n", + -EBADMSG, + "invalid action value (2)" + }, + { + "policy_name=test policy_version=0.0.0\n" + "DEFAULT action=ALLOW\n" + "UNKNOWN value=true\n", + -EBADMSG, + "unrecognized statement" + }, + { + "policy_name=test policy_version=0.0.0\n" + "DEFAULT action=ALLOW\n" + "op=EXECUTE dmverity_roothash=1c0d7ee1f8343b7fbe418378e8eb22c061d7dec7 action=DENY\n", + -EBADMSG, + "old-style digest" + }, + { + "policy_name=test policy_version=0.0.0\n" + "DEFAULT action=ALLOW\n" + "op=EXECUTE fsverity_digest=1c0d7ee1f8343b7fbe418378e8eb22c061d7dec7 action=DENY\n", + -EBADMSG, + "old-style digest" + } +}; + +static void pol_to_desc(const struct policy_case *c, char *desc) +{ + strscpy(desc, c->desc, KUNIT_PARAM_DESC_SIZE); +} + +KUNIT_ARRAY_PARAM(ipe_policies, policy_cases, pol_to_desc); + +/** + * ipe_parser_unsigned_test - Test the parser by passing unsigned policies. + * @test: Supplies a pointer to a kunit structure. + * + * This is called by the kunit harness. This test does not check the correctness + * of the policy, but ensures that errors are handled correctly. + */ +static void ipe_parser_unsigned_test(struct kunit *test) +{ + const struct policy_case *p = test->param_value; + struct ipe_policy *pol; + + pol = ipe_new_policy(p->policy, strlen(p->policy), NULL, 0); + + if (p->errno) { + KUNIT_EXPECT_EQ(test, PTR_ERR(pol), p->errno); + return; + } + + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pol); + KUNIT_EXPECT_NOT_ERR_OR_NULL(test, pol->parsed); + KUNIT_EXPECT_STREQ(test, pol->text, p->policy); + KUNIT_EXPECT_PTR_EQ(test, NULL, pol->pkcs7); + KUNIT_EXPECT_EQ(test, 0, pol->pkcs7len); + + ipe_free_policy(pol); +} + +/** + * ipe_parser_widestring_test - Ensure parser fail on a wide string policy. + * @test: Supplies a pointer to a kunit structure. + * + * This is called by the kunit harness. + */ +static void ipe_parser_widestring_test(struct kunit *test) +{ + const unsigned short policy[] = L"policy_name=Test policy_version=0.0.0\n" + L"DEFAULT action=ALLOW"; + struct ipe_policy *pol = NULL; + + pol = ipe_new_policy((const char *)policy, (ARRAY_SIZE(policy) - 1) * 2, NULL, 0); + KUNIT_EXPECT_TRUE(test, IS_ERR_OR_NULL(pol)); + + ipe_free_policy(pol); +} + +static struct kunit_case ipe_parser_test_cases[] = { + KUNIT_CASE_PARAM(ipe_parser_unsigned_test, ipe_policies_gen_params), + KUNIT_CASE(ipe_parser_widestring_test), + { } +}; + +static struct kunit_suite ipe_parser_test_suite = { + .name = "ipe-parser", + .test_cases = ipe_parser_test_cases, +}; + +kunit_test_suite(ipe_parser_test_suite); -- cgit v1.3.1