diff options
Diffstat (limited to 'fs/binfmt_elf_test.c')
| -rw-r--r-- | fs/binfmt_elf_test.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/fs/binfmt_elf_test.c b/fs/binfmt_elf_test.c new file mode 100644 index 000000000000..11d734fec366 --- /dev/null +++ b/fs/binfmt_elf_test.c @@ -0,0 +1,64 @@ +// SPDX-License-Identifier: GPL-2.0-only +#include <kunit/test.h> + +static void total_mapping_size_test(struct kunit *test) +{ + struct elf_phdr empty[] = { + { .p_type = PT_LOAD, .p_vaddr = 0, .p_memsz = 0, }, + { .p_type = PT_INTERP, .p_vaddr = 10, .p_memsz = 999999, }, + }; + /* + * readelf -lW /bin/mount | grep '^ .*0x0' | awk '{print "\t\t{ .p_type = PT_" \ + * $1 ", .p_vaddr = " $3 ", .p_memsz = " $6 ", },"}' + */ + struct elf_phdr mount[] = { + { .p_type = PT_PHDR, .p_vaddr = 0x00000040, .p_memsz = 0x0002d8, }, + { .p_type = PT_INTERP, .p_vaddr = 0x00000318, .p_memsz = 0x00001c, }, + { .p_type = PT_LOAD, .p_vaddr = 0x00000000, .p_memsz = 0x0033a8, }, + { .p_type = PT_LOAD, .p_vaddr = 0x00004000, .p_memsz = 0x005c91, }, + { .p_type = PT_LOAD, .p_vaddr = 0x0000a000, .p_memsz = 0x0022f8, }, + { .p_type = PT_LOAD, .p_vaddr = 0x0000d330, .p_memsz = 0x000d40, }, + { .p_type = PT_DYNAMIC, .p_vaddr = 0x0000d928, .p_memsz = 0x000200, }, + { .p_type = PT_NOTE, .p_vaddr = 0x00000338, .p_memsz = 0x000030, }, + { .p_type = PT_NOTE, .p_vaddr = 0x00000368, .p_memsz = 0x000044, }, + { .p_type = PT_GNU_PROPERTY, .p_vaddr = 0x00000338, .p_memsz = 0x000030, }, + { .p_type = PT_GNU_EH_FRAME, .p_vaddr = 0x0000b490, .p_memsz = 0x0001ec, }, + { .p_type = PT_GNU_STACK, .p_vaddr = 0x00000000, .p_memsz = 0x000000, }, + { .p_type = PT_GNU_RELRO, .p_vaddr = 0x0000d330, .p_memsz = 0x000cd0, }, + }; + size_t mount_size = 0xE070; + /* https://lore.kernel.org/linux-fsdevel/YfF18Dy85mCntXrx@fractal.localdomain */ + struct elf_phdr unordered[] = { + { .p_type = PT_LOAD, .p_vaddr = 0x00000000, .p_memsz = 0x0033a8, }, + { .p_type = PT_LOAD, .p_vaddr = 0x0000d330, .p_memsz = 0x000d40, }, + { .p_type = PT_LOAD, .p_vaddr = 0x00004000, .p_memsz = 0x005c91, }, + { .p_type = PT_LOAD, .p_vaddr = 0x0000a000, .p_memsz = 0x0022f8, }, + }; + + /* No headers, no size. */ + KUNIT_EXPECT_EQ(test, total_mapping_size(NULL, 0), 0); + KUNIT_EXPECT_EQ(test, total_mapping_size(empty, 0), 0); + /* Empty headers, no size. */ + KUNIT_EXPECT_EQ(test, total_mapping_size(empty, 1), 0); + /* No PT_LOAD headers, no size. */ + KUNIT_EXPECT_EQ(test, total_mapping_size(&empty[1], 1), 0); + /* Empty PT_LOAD and non-PT_LOAD headers, no size. */ + KUNIT_EXPECT_EQ(test, total_mapping_size(empty, 2), 0); + + /* Normal set of PT_LOADS, and expected size. */ + KUNIT_EXPECT_EQ(test, total_mapping_size(mount, ARRAY_SIZE(mount)), mount_size); + /* Unordered PT_LOADs result in same size. */ + KUNIT_EXPECT_EQ(test, total_mapping_size(unordered, ARRAY_SIZE(unordered)), mount_size); +} + +static struct kunit_case binfmt_elf_test_cases[] = { + KUNIT_CASE(total_mapping_size_test), + {}, +}; + +static struct kunit_suite binfmt_elf_test_suite = { + .name = KBUILD_MODNAME, + .test_cases = binfmt_elf_test_cases, +}; + +kunit_test_suite(binfmt_elf_test_suite); |