The patch titled
Subject: test_hexdump: test all possible group sizes for overflow
has been added to the -mm tree. Its filename is
test_hexdump-test-all-possible-group-sizes-for-overflow.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/test_hexdump-test-all-possible-group-sizes-for-overflow.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/test_hexdump-test-all-possible-group-sizes-for-overflow.patch
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------------------------------------------------------
From: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Subject: 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@xxxxxxxxxxxxxxx>
Cc: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/test_hexdump.c | 21 ++++++++++++++++++---
1 file changed, 18 insertions(+), 3 deletions(-)
diff -puN lib/test_hexdump.c~test_hexdump-test-all-possible-group-sizes-for-overflow lib/test_hexdump.c
--- a/lib/test_hexdump.c~test_hexdump-test-all-possible-group-sizes-for-overflow
+++ a/lib/test_hexdump.c
@@ -133,7 +133,9 @@ static void __init test_hexdump_set(int
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
}
}
+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;
}
_
Patches currently in -mm which might be from andriy.shevchenko@xxxxxxxxxxxxxxx are
test_hexdump-rename-to-test_hexdump.patch
test_hexdump-introduce-test_hexdump_prepare_test-helper.patch
test_hexdump-define-fill_char-constant.patch
test_hexdump-go-through-all-possible-lengths-of-buffer.patch
test_hexdump-replace-magic-numbers-by-their-meaning.patch
test_hexdump-switch-to-memcmp.patch
test_hexdump-check-all-bytes-in-real-buffer.patch
test_hexdump-test-all-possible-group-sizes-for-overflow.patch
test_hexdump-print-statistics-at-the-end.patch
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