1 // SPDX-License-Identifier: GPL-2.0-only 2 #include <kunit/test.h> 3 4 static void total_mapping_size_test(struct kunit *test) 5 { 6 struct elf_phdr empty[] = { 7 { .p_type = PT_LOAD, .p_vaddr = 0, .p_memsz = 0, }, 8 { .p_type = PT_INTERP, .p_vaddr = 10, .p_memsz = 999999, }, 9 }; 10 /* 11 * readelf -lW /bin/mount | grep '^ .*0x0' | awk '{print "\t\t{ .p_type = PT_" \ 12 * $1 ", .p_vaddr = " $3 ", .p_memsz = " $6 ", },"}' 13 */ 14 struct elf_phdr mount[] = { 15 { .p_type = PT_PHDR, .p_vaddr = 0x00000040, .p_memsz = 0x0002d8, }, 16 { .p_type = PT_INTERP, .p_vaddr = 0x00000318, .p_memsz = 0x00001c, }, 17 { .p_type = PT_LOAD, .p_vaddr = 0x00000000, .p_memsz = 0x0033a8, }, 18 { .p_type = PT_LOAD, .p_vaddr = 0x00004000, .p_memsz = 0x005c91, }, 19 { .p_type = PT_LOAD, .p_vaddr = 0x0000a000, .p_memsz = 0x0022f8, }, 20 { .p_type = PT_LOAD, .p_vaddr = 0x0000d330, .p_memsz = 0x000d40, }, 21 { .p_type = PT_DYNAMIC, .p_vaddr = 0x0000d928, .p_memsz = 0x000200, }, 22 { .p_type = PT_NOTE, .p_vaddr = 0x00000338, .p_memsz = 0x000030, }, 23 { .p_type = PT_NOTE, .p_vaddr = 0x00000368, .p_memsz = 0x000044, }, 24 { .p_type = PT_GNU_PROPERTY, .p_vaddr = 0x00000338, .p_memsz = 0x000030, }, 25 { .p_type = PT_GNU_EH_FRAME, .p_vaddr = 0x0000b490, .p_memsz = 0x0001ec, }, 26 { .p_type = PT_GNU_STACK, .p_vaddr = 0x00000000, .p_memsz = 0x000000, }, 27 { .p_type = PT_GNU_RELRO, .p_vaddr = 0x0000d330, .p_memsz = 0x000cd0, }, 28 }; 29 size_t mount_size = 0xE070; 30 /* https://lore.kernel.org/linux-fsdevel/YfF18Dy85mCntXrx@fractal.localdomain */ 31 struct elf_phdr unordered[] = { 32 { .p_type = PT_LOAD, .p_vaddr = 0x00000000, .p_memsz = 0x0033a8, }, 33 { .p_type = PT_LOAD, .p_vaddr = 0x0000d330, .p_memsz = 0x000d40, }, 34 { .p_type = PT_LOAD, .p_vaddr = 0x00004000, .p_memsz = 0x005c91, }, 35 { .p_type = PT_LOAD, .p_vaddr = 0x0000a000, .p_memsz = 0x0022f8, }, 36 }; 37 38 /* No headers, no size. */ 39 KUNIT_EXPECT_EQ(test, total_mapping_size(NULL, 0), 0); 40 KUNIT_EXPECT_EQ(test, total_mapping_size(empty, 0), 0); 41 /* Empty headers, no size. */ 42 KUNIT_EXPECT_EQ(test, total_mapping_size(empty, 1), 0); 43 /* No PT_LOAD headers, no size. */ 44 KUNIT_EXPECT_EQ(test, total_mapping_size(&empty[1], 1), 0); 45 /* Empty PT_LOAD and non-PT_LOAD headers, no size. */ 46 KUNIT_EXPECT_EQ(test, total_mapping_size(empty, 2), 0); 47 48 /* Normal set of PT_LOADS, and expected size. */ 49 KUNIT_EXPECT_EQ(test, total_mapping_size(mount, ARRAY_SIZE(mount)), mount_size); 50 /* Unordered PT_LOADs result in same size. */ 51 KUNIT_EXPECT_EQ(test, total_mapping_size(unordered, ARRAY_SIZE(unordered)), mount_size); 52 } 53 54 static struct kunit_case binfmt_elf_test_cases[] = { 55 KUNIT_CASE(total_mapping_size_test), 56 {}, 57 }; 58 59 static struct kunit_suite binfmt_elf_test_suite = { 60 .name = KBUILD_MODNAME, 61 .test_cases = binfmt_elf_test_cases, 62 }; 63 64 kunit_test_suite(binfmt_elf_test_suite); 65