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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>
This commit is contained in:
Andy Shevchenko 2016-01-20 14:58:53 -08:00 committed by Linus Torvalds
parent 3db4a98718
commit a3d601fcc2
1 changed files with 13 additions and 14 deletions
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27
lib/test_hexdump.c
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@ -133,17 +133,16 @@ static void __init test_hexdump_set(int rowsize, bool ascii)
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 @@ static void __init test_hexdump_overflow(bool ascii)
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 @@ static void __init test_hexdump_overflow(bool ascii)
}
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 @@ 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 <= 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;
}