From: Dmitry Antipov <dmantipov@yandex.ru>
Date: Tue, 19 May 2026 17:22:54 +0000 (+0300)
Subject: lib: add more string to 64-bit integer conversion overflow tests
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ab90fc1007245380988c500ddf7eff6da1b10056;p=thirdparty%2Flinux.git

lib: add more string to 64-bit integer conversion overflow tests

Add a few more string to 64-bit integer conversion tests to check whether
'kstrtoull()', 'kstrtoll()', 'kstrtou64()' and 'kstrtos64()' can handle
overflows reported by '_parse_integer_limit()'.

Link: https://lore.kernel.org/20260519172259.908980-4-dmantipov@yandex.ru
Signed-off-by: Dmitry Antipov <dmantipov@yandex.ru>
Suggested-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Alexandre Ghiti <alex@ghiti.fr>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Charlie Jenkins <thecharlesjenkins@gmail.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/lib/test-kstrtox.c b/lib/test-kstrtox.c
index ee87fef66cb5..811128d0df16 100644
--- a/lib/test-kstrtox.c
+++ b/lib/test-kstrtox.c
@@ -198,6 +198,7 @@ static void __init test_kstrtoull_fail(void)
 		{"10000000000000000000000000000000000000000000000000000000000000000",	2},
 		{"2000000000000000000000",	8},
 		{"18446744073709551616",	10},
+		{"569202370375329612767",	10},
 		{"10000000000000000",	16},
 		/* negative */
 		{"-0", 0},
@@ -275,9 +276,11 @@ static void __init test_kstrtoll_fail(void)
 		{"9223372036854775809",	10},
 		{"18446744073709551614",	10},
 		{"18446744073709551615",	10},
+		{"569202370375329612767",	10},
 		{"-9223372036854775809",	10},
 		{"-18446744073709551614",	10},
 		{"-18446744073709551615",	10},
+		{"-569202370375329612767",	10},
 		/* sign is first character if any */
 		{"-+1", 0},
 		{"-+1", 8},
@@ -334,6 +337,7 @@ static void __init test_kstrtou64_fail(void)
 		{"-1",	10},
 		{"18446744073709551616",	10},
 		{"18446744073709551617",	10},
+		{"569202370375329612767",	10},
 	};
 	TEST_FAIL(kstrtou64, u64, "%llu", test_u64_fail);
 }
@@ -386,6 +390,8 @@ static void __init test_kstrtos64_fail(void)
 		{"18446744073709551615",	10},
 		{"18446744073709551616",	10},
 		{"18446744073709551617",	10},
+		{"569202370375329612767",	10},
+		{"-569202370375329612767",	10},
 	};
 	TEST_FAIL(kstrtos64, s64, "%lld", test_s64_fail);
 }