diff options
Diffstat (limited to 'lib/test-hexdump.c')
| -rw-r--r-- | lib/test-hexdump.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/lib/test-hexdump.c b/lib/test-hexdump.c index 9d3bd1e9ae48..daf29a390a89 100644 --- a/lib/test-hexdump.c +++ b/lib/test-hexdump.c @@ -114,6 +114,45 @@ static void __init test_hexdump_set(int rowsize, bool ascii) test_hexdump(len, rowsize, 1, ascii); } +static void __init test_hexdump_overflow(bool ascii) +{ + char buf[56]; + const char *t = test_data_1_le[0]; + size_t l = get_random_int() % sizeof(buf); + bool a; + int e, r; + + memset(buf, ' ', sizeof(buf)); + + r = hex_dump_to_buffer(data_b, 1, 16, 1, buf, l, ascii); + + if (ascii) + e = 50; + else + e = 2; + buf[e + 2] = '\0'; + + if (!l) { + a = r == e && buf[0] == ' '; + } else if (l < 3) { + a = r == e && buf[0] == '\0'; + } else if (l < 4) { + a = r == e && !strcmp(buf, t); + } else if (ascii) { + if (l < 51) + a = r == e && buf[l - 1] == '\0' && buf[l - 2] == ' '; + else + a = r == e && buf[50] == '\0' && buf[49] == '.'; + } else { + a = r == e && buf[e] == '\0'; + } + + if (!a) { + pr_err("Len: %zu rc: %u strlen: %zu\n", l, r, strlen(buf)); + pr_err("Result: '%s'\n", buf); + } +} + static int __init test_hexdump_init(void) { unsigned int i; @@ -129,6 +168,12 @@ static int __init test_hexdump_init(void) for (i = 0; i < 16; i++) test_hexdump_set(rowsize, true); + for (i = 0; i < 16; i++) + test_hexdump_overflow(false); + + for (i = 0; i < 16; i++) + test_hexdump_overflow(true); + return -EINVAL; } module_init(test_hexdump_init); |