test_hexdump: go through all possible lengths of buffer
When test for overflow do iterate the buffer length in a range 0 ..
BUF_SIZE.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/lib/test_hexdump.c b/lib/test_hexdump.c
index 1ecdb97..940b1d3 100644
--- a/lib/test_hexdump.c
+++ b/lib/test_hexdump.c
@@ -133,17 +133,16 @@
test_hexdump(len, rowsize, 1, ascii);
}
-static void __init test_hexdump_overflow(bool ascii)
+static void __init test_hexdump_overflow(size_t buflen, bool ascii)
{
- char buf[56];
+ char buf[TEST_HEXDUMP_BUF_SIZE];
const char *t = test_data_1_le[0];
- size_t l = get_random_int() % sizeof(buf);
bool a;
int e, r;
memset(buf, FILL_CHAR, sizeof(buf));
- r = hex_dump_to_buffer(data_b, 1, 16, 1, buf, l, ascii);
+ r = hex_dump_to_buffer(data_b, 1, 16, 1, buf, buflen, ascii);
if (ascii)
e = 50;
@@ -151,15 +150,15 @@
e = 2;
buf[e + 2] = '\0';
- if (!l) {
+ if (!buflen) {
a = r == e && buf[0] == FILL_CHAR;
- } else if (l < 3) {
+ } else if (buflen < 3) {
a = r == e && buf[0] == '\0';
- } else if (l < 4) {
+ } else if (buflen < 4) {
a = r == e && !strcmp(buf, t);
} else if (ascii) {
- if (l < 51)
- a = r == e && buf[l - 1] == '\0' && buf[l - 2] == FILL_CHAR;
+ if (buflen < 51)
+ a = r == e && buf[buflen - 1] == '\0' && buf[buflen - 2] == FILL_CHAR;
else
a = r == e && buf[50] == '\0' && buf[49] == '.';
} else {
@@ -167,7 +166,7 @@
}
if (!a) {
- pr_err("Len: %zu rc: %u strlen: %zu\n", l, r, strlen(buf));
+ pr_err("Len: %zu rc: %u strlen: %zu\n", buflen, r, strlen(buf));
pr_err("Result: '%s'\n", buf);
}
}
@@ -187,11 +186,11 @@
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 <= TEST_HEXDUMP_BUF_SIZE; i++)
+ test_hexdump_overflow(i, false);
- for (i = 0; i < 16; i++)
- test_hexdump_overflow(true);
+ for (i = 0; i <= TEST_HEXDUMP_BUF_SIZE; i++)
+ test_hexdump_overflow(i, true);
return -EINVAL;
}