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geky bot
288
tests/test_evil.toml
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288
tests/test_evil.toml
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# Tests for recovering from conditions which shouldn't normally
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# happen during normal operation of littlefs
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# invalid pointer tests (outside of block_count)
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[[case]] # invalid tail-pointer test
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define.TAIL_TYPE = ['LFS2_TYPE_HARDTAIL', 'LFS2_TYPE_SOFTTAIL']
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define.INVALSET = [0x3, 0x1, 0x2]
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in = "lfs2.c"
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code = '''
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// create littlefs
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lfs2_format(&lfs2, &cfg) => 0;
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// change tail-pointer to invalid pointers
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lfs2_init(&lfs2, &cfg) => 0;
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lfs2_mdir_t mdir;
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lfs2_dir_fetch(&lfs2, &mdir, (lfs2_block_t[2]){0, 1}) => 0;
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lfs2_dir_commit(&lfs2, &mdir, LFS2_MKATTRS(
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{LFS2_MKTAG(LFS2_TYPE_HARDTAIL, 0x3ff, 8),
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(lfs2_block_t[2]){
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(INVALSET & 0x1) ? 0xcccccccc : 0,
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(INVALSET & 0x2) ? 0xcccccccc : 0}})) => 0;
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lfs2_deinit(&lfs2) => 0;
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// test that mount fails gracefully
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lfs2_mount(&lfs2, &cfg) => LFS2_ERR_CORRUPT;
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'''
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[[case]] # invalid dir pointer test
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define.INVALSET = [0x3, 0x1, 0x2]
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in = "lfs2.c"
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code = '''
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// create littlefs
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lfs2_format(&lfs2, &cfg) => 0;
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// make a dir
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lfs2_mount(&lfs2, &cfg) => 0;
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lfs2_mkdir(&lfs2, "dir_here") => 0;
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lfs2_unmount(&lfs2) => 0;
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// change the dir pointer to be invalid
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lfs2_init(&lfs2, &cfg) => 0;
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lfs2_mdir_t mdir;
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lfs2_dir_fetch(&lfs2, &mdir, (lfs2_block_t[2]){0, 1}) => 0;
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// make sure id 1 == our directory
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lfs2_dir_get(&lfs2, &mdir,
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LFS2_MKTAG(0x700, 0x3ff, 0),
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LFS2_MKTAG(LFS2_TYPE_NAME, 1, strlen("dir_here")), buffer)
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=> LFS2_MKTAG(LFS2_TYPE_DIR, 1, strlen("dir_here"));
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assert(memcmp((char*)buffer, "dir_here", strlen("dir_here")) == 0);
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// change dir pointer
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lfs2_dir_commit(&lfs2, &mdir, LFS2_MKATTRS(
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{LFS2_MKTAG(LFS2_TYPE_DIRSTRUCT, 1, 8),
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(lfs2_block_t[2]){
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(INVALSET & 0x1) ? 0xcccccccc : 0,
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(INVALSET & 0x2) ? 0xcccccccc : 0}})) => 0;
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lfs2_deinit(&lfs2) => 0;
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// test that accessing our bad dir fails, note there's a number
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// of ways to access the dir, some can fail, but some don't
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lfs2_mount(&lfs2, &cfg) => 0;
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lfs2_stat(&lfs2, "dir_here", &info) => 0;
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assert(strcmp(info.name, "dir_here") == 0);
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assert(info.type == LFS2_TYPE_DIR);
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lfs2_dir_open(&lfs2, &dir, "dir_here") => LFS2_ERR_CORRUPT;
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lfs2_stat(&lfs2, "dir_here/file_here", &info) => LFS2_ERR_CORRUPT;
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lfs2_dir_open(&lfs2, &dir, "dir_here/dir_here") => LFS2_ERR_CORRUPT;
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lfs2_file_open(&lfs2, &file, "dir_here/file_here",
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LFS2_O_RDONLY) => LFS2_ERR_CORRUPT;
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lfs2_file_open(&lfs2, &file, "dir_here/file_here",
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LFS2_O_WRONLY | LFS2_O_CREAT) => LFS2_ERR_CORRUPT;
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lfs2_unmount(&lfs2) => 0;
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'''
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[[case]] # invalid file pointer test
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in = "lfs2.c"
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define.SIZE = [10, 1000, 100000] # faked file size
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code = '''
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// create littlefs
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lfs2_format(&lfs2, &cfg) => 0;
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// make a file
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lfs2_mount(&lfs2, &cfg) => 0;
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lfs2_file_open(&lfs2, &file, "file_here",
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LFS2_O_WRONLY | LFS2_O_CREAT) => 0;
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lfs2_file_close(&lfs2, &file) => 0;
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lfs2_unmount(&lfs2) => 0;
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// change the file pointer to be invalid
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lfs2_init(&lfs2, &cfg) => 0;
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lfs2_mdir_t mdir;
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lfs2_dir_fetch(&lfs2, &mdir, (lfs2_block_t[2]){0, 1}) => 0;
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// make sure id 1 == our file
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lfs2_dir_get(&lfs2, &mdir,
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LFS2_MKTAG(0x700, 0x3ff, 0),
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LFS2_MKTAG(LFS2_TYPE_NAME, 1, strlen("file_here")), buffer)
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=> LFS2_MKTAG(LFS2_TYPE_REG, 1, strlen("file_here"));
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assert(memcmp((char*)buffer, "file_here", strlen("file_here")) == 0);
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// change file pointer
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lfs2_dir_commit(&lfs2, &mdir, LFS2_MKATTRS(
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{LFS2_MKTAG(LFS2_TYPE_CTZSTRUCT, 1, sizeof(struct lfs2_ctz)),
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&(struct lfs2_ctz){0xcccccccc, lfs2_tole32(SIZE)}})) => 0;
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lfs2_deinit(&lfs2) => 0;
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// test that accessing our bad file fails, note there's a number
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// of ways to access the dir, some can fail, but some don't
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lfs2_mount(&lfs2, &cfg) => 0;
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lfs2_stat(&lfs2, "file_here", &info) => 0;
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assert(strcmp(info.name, "file_here") == 0);
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assert(info.type == LFS2_TYPE_REG);
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assert(info.size == SIZE);
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lfs2_file_open(&lfs2, &file, "file_here", LFS2_O_RDONLY) => 0;
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lfs2_file_read(&lfs2, &file, buffer, SIZE) => LFS2_ERR_CORRUPT;
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lfs2_file_close(&lfs2, &file) => 0;
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// any allocs that traverse CTZ must unfortunately must fail
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if (SIZE > 2*LFS2_BLOCK_SIZE) {
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lfs2_mkdir(&lfs2, "dir_here") => LFS2_ERR_CORRUPT;
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}
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lfs2_unmount(&lfs2) => 0;
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'''
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[[case]] # invalid pointer in CTZ skip-list test
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define.SIZE = ['2*LFS2_BLOCK_SIZE', '3*LFS2_BLOCK_SIZE', '4*LFS2_BLOCK_SIZE']
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in = "lfs2.c"
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code = '''
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// create littlefs
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lfs2_format(&lfs2, &cfg) => 0;
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// make a file
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lfs2_mount(&lfs2, &cfg) => 0;
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lfs2_file_open(&lfs2, &file, "file_here",
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LFS2_O_WRONLY | LFS2_O_CREAT) => 0;
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for (int i = 0; i < SIZE; i++) {
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char c = 'c';
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lfs2_file_write(&lfs2, &file, &c, 1) => 1;
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}
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lfs2_file_close(&lfs2, &file) => 0;
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lfs2_unmount(&lfs2) => 0;
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// change pointer in CTZ skip-list to be invalid
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lfs2_init(&lfs2, &cfg) => 0;
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lfs2_mdir_t mdir;
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lfs2_dir_fetch(&lfs2, &mdir, (lfs2_block_t[2]){0, 1}) => 0;
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// make sure id 1 == our file and get our CTZ structure
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lfs2_dir_get(&lfs2, &mdir,
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LFS2_MKTAG(0x700, 0x3ff, 0),
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LFS2_MKTAG(LFS2_TYPE_NAME, 1, strlen("file_here")), buffer)
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=> LFS2_MKTAG(LFS2_TYPE_REG, 1, strlen("file_here"));
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assert(memcmp((char*)buffer, "file_here", strlen("file_here")) == 0);
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struct lfs2_ctz ctz;
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lfs2_dir_get(&lfs2, &mdir,
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LFS2_MKTAG(0x700, 0x3ff, 0),
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LFS2_MKTAG(LFS2_TYPE_STRUCT, 1, sizeof(struct lfs2_ctz)), &ctz)
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=> LFS2_MKTAG(LFS2_TYPE_CTZSTRUCT, 1, sizeof(struct lfs2_ctz));
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lfs2_ctz_fromle32(&ctz);
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// rewrite block to contain bad pointer
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uint8_t bbuffer[LFS2_BLOCK_SIZE];
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cfg.read(&cfg, ctz.head, 0, bbuffer, LFS2_BLOCK_SIZE) => 0;
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uint32_t bad = lfs2_tole32(0xcccccccc);
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memcpy(&bbuffer[0], &bad, sizeof(bad));
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memcpy(&bbuffer[4], &bad, sizeof(bad));
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cfg.erase(&cfg, ctz.head) => 0;
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cfg.prog(&cfg, ctz.head, 0, bbuffer, LFS2_BLOCK_SIZE) => 0;
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lfs2_deinit(&lfs2) => 0;
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// test that accessing our bad file fails, note there's a number
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// of ways to access the dir, some can fail, but some don't
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lfs2_mount(&lfs2, &cfg) => 0;
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lfs2_stat(&lfs2, "file_here", &info) => 0;
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assert(strcmp(info.name, "file_here") == 0);
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assert(info.type == LFS2_TYPE_REG);
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assert(info.size == SIZE);
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lfs2_file_open(&lfs2, &file, "file_here", LFS2_O_RDONLY) => 0;
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lfs2_file_read(&lfs2, &file, buffer, SIZE) => LFS2_ERR_CORRUPT;
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lfs2_file_close(&lfs2, &file) => 0;
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// any allocs that traverse CTZ must unfortunately must fail
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if (SIZE > 2*LFS2_BLOCK_SIZE) {
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lfs2_mkdir(&lfs2, "dir_here") => LFS2_ERR_CORRUPT;
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}
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lfs2_unmount(&lfs2) => 0;
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'''
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[[case]] # invalid gstate pointer
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define.INVALSET = [0x3, 0x1, 0x2]
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in = "lfs2.c"
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code = '''
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// create littlefs
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lfs2_format(&lfs2, &cfg) => 0;
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// create an invalid gstate
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lfs2_init(&lfs2, &cfg) => 0;
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lfs2_mdir_t mdir;
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lfs2_dir_fetch(&lfs2, &mdir, (lfs2_block_t[2]){0, 1}) => 0;
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lfs2_fs_prepmove(&lfs2, 1, (lfs2_block_t [2]){
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(INVALSET & 0x1) ? 0xcccccccc : 0,
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(INVALSET & 0x2) ? 0xcccccccc : 0});
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lfs2_dir_commit(&lfs2, &mdir, NULL, 0) => 0;
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lfs2_deinit(&lfs2) => 0;
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// test that mount fails gracefully
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// mount may not fail, but our first alloc should fail when
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// we try to fix the gstate
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lfs2_mount(&lfs2, &cfg) => 0;
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lfs2_mkdir(&lfs2, "should_fail") => LFS2_ERR_CORRUPT;
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lfs2_unmount(&lfs2) => 0;
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'''
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# cycle detection/recovery tests
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[[case]] # metadata-pair threaded-list loop test
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in = "lfs2.c"
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code = '''
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// create littlefs
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lfs2_format(&lfs2, &cfg) => 0;
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// change tail-pointer to point to ourself
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lfs2_init(&lfs2, &cfg) => 0;
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lfs2_mdir_t mdir;
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lfs2_dir_fetch(&lfs2, &mdir, (lfs2_block_t[2]){0, 1}) => 0;
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lfs2_dir_commit(&lfs2, &mdir, LFS2_MKATTRS(
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{LFS2_MKTAG(LFS2_TYPE_HARDTAIL, 0x3ff, 8),
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(lfs2_block_t[2]){0, 1}})) => 0;
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lfs2_deinit(&lfs2) => 0;
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// test that mount fails gracefully
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lfs2_mount(&lfs2, &cfg) => LFS2_ERR_CORRUPT;
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'''
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[[case]] # metadata-pair threaded-list 2-length loop test
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in = "lfs2.c"
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code = '''
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// create littlefs with child dir
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lfs2_format(&lfs2, &cfg) => 0;
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lfs2_mount(&lfs2, &cfg) => 0;
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lfs2_mkdir(&lfs2, "child") => 0;
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lfs2_unmount(&lfs2) => 0;
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// find child
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lfs2_init(&lfs2, &cfg) => 0;
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lfs2_mdir_t mdir;
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lfs2_block_t pair[2];
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lfs2_dir_fetch(&lfs2, &mdir, (lfs2_block_t[2]){0, 1}) => 0;
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lfs2_dir_get(&lfs2, &mdir,
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LFS2_MKTAG(0x7ff, 0x3ff, 0),
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LFS2_MKTAG(LFS2_TYPE_DIRSTRUCT, 1, sizeof(pair)), pair)
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=> LFS2_MKTAG(LFS2_TYPE_DIRSTRUCT, 1, sizeof(pair));
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lfs2_pair_fromle32(pair);
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// change tail-pointer to point to root
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lfs2_dir_fetch(&lfs2, &mdir, pair) => 0;
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lfs2_dir_commit(&lfs2, &mdir, LFS2_MKATTRS(
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{LFS2_MKTAG(LFS2_TYPE_HARDTAIL, 0x3ff, 8),
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(lfs2_block_t[2]){0, 1}})) => 0;
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lfs2_deinit(&lfs2) => 0;
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// test that mount fails gracefully
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lfs2_mount(&lfs2, &cfg) => LFS2_ERR_CORRUPT;
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'''
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[[case]] # metadata-pair threaded-list 1-length child loop test
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in = "lfs2.c"
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code = '''
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// create littlefs with child dir
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lfs2_format(&lfs2, &cfg) => 0;
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lfs2_mount(&lfs2, &cfg) => 0;
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lfs2_mkdir(&lfs2, "child") => 0;
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lfs2_unmount(&lfs2) => 0;
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// find child
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lfs2_init(&lfs2, &cfg) => 0;
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lfs2_mdir_t mdir;
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lfs2_block_t pair[2];
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lfs2_dir_fetch(&lfs2, &mdir, (lfs2_block_t[2]){0, 1}) => 0;
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lfs2_dir_get(&lfs2, &mdir,
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LFS2_MKTAG(0x7ff, 0x3ff, 0),
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LFS2_MKTAG(LFS2_TYPE_DIRSTRUCT, 1, sizeof(pair)), pair)
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=> LFS2_MKTAG(LFS2_TYPE_DIRSTRUCT, 1, sizeof(pair));
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lfs2_pair_fromle32(pair);
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// change tail-pointer to point to ourself
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lfs2_dir_fetch(&lfs2, &mdir, pair) => 0;
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lfs2_dir_commit(&lfs2, &mdir, LFS2_MKATTRS(
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{LFS2_MKTAG(LFS2_TYPE_HARDTAIL, 0x3ff, 8), pair})) => 0;
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lfs2_deinit(&lfs2) => 0;
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// test that mount fails gracefully
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lfs2_mount(&lfs2, &cfg) => LFS2_ERR_CORRUPT;
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'''
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