From 27600805e62f800bacf990354632eae4e487d34c Mon Sep 17 00:00:00 2001 From: Yazen Ghannam Date: Thu, 3 Sep 2026 10:43:25 -0500 Subject: x86/amd_node: Fix PCI device reference counting in amd_smn_init() The local "root" pointer is a temporary variable used during the device search. Therefore, refcount related to the search iterators should be cleaned up after the search is complete. Use the __free() cleanup macro to ensure the refcount is decremented when the temporary pointer goes out of scope. Additionally, increment the refcount when caching a root pointer. This ensures the in-use refcount is separate from the temporary search refcounting. Finally, drop the redundant "root = NULL" before the second search loop. The pci_get_class() iterator always decrements the refcount of its "from" argument, so the first loop can only fall through with "root" already NULL. Fixes: 0a4b61d9c2e4 ("x86/amd_node: Fix AMD root device caching") Closes: https://sashiko.dev/#/patchset/20260806160159.230453-1-jason.andryuk%40amd.com Reported-by: Sashiko Assisted-by: LLM Signed-off-by: Yazen Ghannam Signed-off-by: Borislav Petkov (AMD) Reviewed-by: Mario Limonciello (AMD) Cc: Link: https://patch.msgid.link/20260903154325.74343-1-yazen.ghannam@amd.com --- fs/hfs/string_test.c | 133 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 133 insertions(+) create mode 100644 fs/hfs/string_test.c (limited to 'fs/hfs/string_test.c') diff --git a/fs/hfs/string_test.c b/fs/hfs/string_test.c new file mode 100644 index 000000000..e1bf6f954 --- /dev/null +++ b/fs/hfs/string_test.c @@ -0,0 +1,133 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * KUnit tests for HFS string operations + * + * Copyright (C) 2025 Viacheslav Dubeyko + */ + +#include +#include +#include "hfs_fs.h" + +/* Test hfs_strcmp function */ +static void hfs_strcmp_test(struct kunit *test) +{ + /* Test equal strings */ + KUNIT_EXPECT_EQ(test, 0, hfs_strcmp("hello", 5, "hello", 5)); + KUNIT_EXPECT_EQ(test, 0, hfs_strcmp("test", 4, "test", 4)); + KUNIT_EXPECT_EQ(test, 0, hfs_strcmp("", 0, "", 0)); + + /* Test unequal strings */ + KUNIT_EXPECT_NE(test, 0, hfs_strcmp("hello", 5, "world", 5)); + KUNIT_EXPECT_NE(test, 0, hfs_strcmp("test", 4, "testing", 7)); + + /* Test different lengths */ + KUNIT_EXPECT_LT(test, hfs_strcmp("test", 4, "testing", 7), 0); + KUNIT_EXPECT_GT(test, hfs_strcmp("testing", 7, "test", 4), 0); + + /* Test case insensitive comparison (HFS should handle case) */ + KUNIT_EXPECT_EQ(test, 0, hfs_strcmp("Test", 4, "TEST", 4)); + KUNIT_EXPECT_EQ(test, 0, hfs_strcmp("hello", 5, "HELLO", 5)); + + /* Test with special characters */ + KUNIT_EXPECT_EQ(test, 0, hfs_strcmp("file.txt", 8, "file.txt", 8)); + KUNIT_EXPECT_NE(test, 0, hfs_strcmp("file.txt", 8, "file.dat", 8)); + + /* Test boundary cases */ + KUNIT_EXPECT_EQ(test, 0, hfs_strcmp("a", 1, "a", 1)); + KUNIT_EXPECT_NE(test, 0, hfs_strcmp("a", 1, "b", 1)); +} + +/* Test hfs_hash_dentry function */ +static void hfs_hash_dentry_test(struct kunit *test) +{ + struct qstr test_name1, test_name2, test_name3; + struct dentry dentry = {}; + char name1[] = "testfile"; + char name2[] = "TestFile"; + char name3[] = "different"; + + /* Initialize test strings */ + test_name1.name = name1; + test_name1.len = strlen(name1); + test_name1.hash = 0; + + test_name2.name = name2; + test_name2.len = strlen(name2); + test_name2.hash = 0; + + test_name3.name = name3; + test_name3.len = strlen(name3); + test_name3.hash = 0; + + /* Test hashing */ + KUNIT_EXPECT_EQ(test, 0, hfs_hash_dentry(&dentry, &test_name1)); + KUNIT_EXPECT_EQ(test, 0, hfs_hash_dentry(&dentry, &test_name2)); + KUNIT_EXPECT_EQ(test, 0, hfs_hash_dentry(&dentry, &test_name3)); + + /* Case insensitive names should hash the same */ + KUNIT_EXPECT_EQ(test, test_name1.hash, test_name2.hash); + + /* Different names should have different hashes */ + KUNIT_EXPECT_NE(test, test_name1.hash, test_name3.hash); +} + +/* Test hfs_compare_dentry function */ +static void hfs_compare_dentry_test(struct kunit *test) +{ + struct qstr test_name; + struct dentry dentry = {}; + char name[] = "TestFile"; + + test_name.name = name; + test_name.len = strlen(name); + + /* Test exact match */ + KUNIT_EXPECT_EQ(test, 0, hfs_compare_dentry(&dentry, 8, + "TestFile", &test_name)); + + /* Test case insensitive match */ + KUNIT_EXPECT_EQ(test, 0, hfs_compare_dentry(&dentry, 8, + "testfile", &test_name)); + KUNIT_EXPECT_EQ(test, 0, hfs_compare_dentry(&dentry, 8, + "TESTFILE", &test_name)); + + /* Test different names */ + KUNIT_EXPECT_EQ(test, 1, hfs_compare_dentry(&dentry, 8, + "DiffFile", &test_name)); + + /* Test different lengths */ + KUNIT_EXPECT_EQ(test, 1, hfs_compare_dentry(&dentry, 7, + "TestFil", &test_name)); + KUNIT_EXPECT_EQ(test, 1, hfs_compare_dentry(&dentry, 9, + "TestFiles", &test_name)); + + /* Test empty string */ + test_name.name = ""; + test_name.len = 0; + KUNIT_EXPECT_EQ(test, 0, hfs_compare_dentry(&dentry, 0, "", &test_name)); + + /* Test HFS_NAMELEN boundary */ + test_name.name = "This_is_a_very_long_filename_that_exceeds_normal_limits"; + test_name.len = strlen(test_name.name); + KUNIT_EXPECT_EQ(test, 0, hfs_compare_dentry(&dentry, HFS_NAMELEN, + "This_is_a_very_long_filename_th", &test_name)); +} + +static struct kunit_case hfs_string_test_cases[] = { + KUNIT_CASE(hfs_strcmp_test), + KUNIT_CASE(hfs_hash_dentry_test), + KUNIT_CASE(hfs_compare_dentry_test), + {} +}; + +static struct kunit_suite hfs_string_test_suite = { + .name = "hfs_string", + .test_cases = hfs_string_test_cases, +}; + +kunit_test_suite(hfs_string_test_suite); + +MODULE_DESCRIPTION("KUnit tests for HFS string operations"); +MODULE_LICENSE("GPL"); +MODULE_IMPORT_NS("EXPORTED_FOR_KUNIT_TESTING"); -- cgit v1.3.1