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authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>2016-01-20 14:59:04 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-01-20 17:09:18 -0800
commit1dacd9ddd359eed63b210bd9b5000c2cfae287ff (patch)
tree76baf50b411c76191f0cbca6b398d9c0a9ed15d1 /lib/test_hexdump.c
parentcc77a719a5cfd419d057277fd0fdfca568bcfdd2 (diff)
downloadlinux-1dacd9ddd359eed63b210bd9b5000c2cfae287ff.tar.bz2
test_hexdump: test all possible group sizes for overflow
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 <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>
Diffstat (limited to 'lib/test_hexdump.c')
-rw-r--r--lib/test_hexdump.c21
1 files changed, 18 insertions, 3 deletions
diff --git a/lib/test_hexdump.c b/lib/test_hexdump.c
index 16a759374730..11d45f510d6c 100644
--- a/lib/test_hexdump.c
+++ b/lib/test_hexdump.c
@@ -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;
}