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test_hexdump: test all possible group sizes for overflow

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Currently the only one combination is tested for overflow, i.e.  rowsize =
16, groupsize = 1, len = 1.  Do various test to go through all possible
branches.

Signed-off-by: Andy Shevchenko <[email protected]>
Cc: Rasmus Villemoes <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Andy Shevchenko authored and Linus Torvalds committed 2016-01-20 17:09:18 -08:00
1 parent cc77a719a5
commit 1dacd9ddd3
1 file changed
+18 -3
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lib/test_hexdump.c
+18 -3
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@@ -133,7 +133,9 @@ static void __init test_hexdump_set(int rowsize, bool ascii)
test_hexdump(len, rowsize, 1, ascii);
}
static void __init test_hexdump_overflow(size_t buflen, bool ascii)
static void __init test_hexdump_overflow(size_t buflen, size_t len,
int rowsize, int groupsize,
bool ascii)
{
char test[TEST_HEXDUMP_BUF_SIZE];
char buf[TEST_HEXDUMP_BUF_SIZE];
@@ -176,6 +178,19 @@ static void __init test_hexdump_overflow(size_t buflen, bool ascii)
}
}
static void __init test_hexdump_overflow_set(size_t buflen, bool ascii)
{
unsigned int i = 0;
int rs = (get_random_int() % 2 + 1) * 16;
do {
int gs = 1 << i;
size_t len = get_random_int() % rs + gs;
test_hexdump_overflow(buflen, rounddown(len, gs), rs, gs, ascii);
} while (i++ < 3);
}
static int __init test_hexdump_init(void)
{
unsigned int i;
@@ -192,10 +207,10 @@ static int __init test_hexdump_init(void)
test_hexdump_set(rowsize, true);
for (i = 0; i <= TEST_HEXDUMP_BUF_SIZE; i++)
test_hexdump_overflow(i, false);
test_hexdump_overflow_set(i, false);
for (i = 0; i <= TEST_HEXDUMP_BUF_SIZE; i++)
test_hexdump_overflow(i, true);
test_hexdump_overflow_set(i, true);
return -EINVAL;
}