+ test_hexdump-go-through-all-possible-lengths-of-buffer.patch added to -mm tree

* + test_hexdump-go-through-all-possible-lengths-of-buffer.patch added to -mm tree
@ 2015-12-10  0:31 akpm
  0 siblings, 0 replies; 2+ messages in thread
From: akpm @ 2015-12-10  0:31 UTC (permalink / raw)
  To: andriy.shevchenko, linux, mm-commits


The patch titled
     Subject: test_hexdump: go through all possible lengths of buffer
has been added to the -mm tree.  Its filename is
     test_hexdump-go-through-all-possible-lengths-of-buffer.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/test_hexdump-go-through-all-possible-lengths-of-buffer.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/test_hexdump-go-through-all-possible-lengths-of-buffer.patch

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------------------------------------------------------
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Subject: 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>
---

 lib/test_hexdump.c |   27 +++++++++++++--------------
 1 file changed, 13 insertions(+), 14 deletions(-)

diff -puN lib/test_hexdump.c~test_hexdump-go-through-all-possible-lengths-of-buffer lib/test_hexdump.c

--- a/lib/test_hexdump.c~test_hexdump-go-through-all-possible-lengths-of-buffer
+++ a/lib/test_hexdump.c
@@ -133,17 +133,16 @@ static void __init test_hexdump_set(int
 	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
 		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
 	}
 
 	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;
 }
_

Patches currently in -mm which might be from andriy.shevchenko@linux.intel.com 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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