[Devel] [PATCH vz10 4/6] ms/selftests/mm: fix strncpy() length

[Konstantin Khorenko]

From: Kevin Brodsky <kevin.brodsky at arm.com>

GCC complains (with -O2) that the length is equal to the destination size,
which is indeed invalid.  Subtract 1 from the size of the array to leave
room for '\0'.

Link: https://lkml.kernel.org/r/20241209095019.1732120-4-kevin.brodsky@arm.com
Signed-off-by: Kevin Brodsky <kevin.brodsky at arm.com>
Cc: Aruna Ramakrishna <aruna.ramakrishna at oracle.com>
Cc: Catalin Marinas <catalin.marinas at arm.com>
Cc: Dave Hansen <dave.hansen at linux.intel.com>
Cc: Joey Gouly <joey.gouly at arm.com>
Cc: Keith Lucas <keith.lucas at oracle.com>
Cc: Ryan Roberts <ryan.roberts at arm.com>
Cc: Shuah Khan <shuah at kernel.org>
Signed-off-by: Andrew Morton <akpm at linux-foundation.org>

(cherry picked from commit 5b6b2799f617b3259d551980fa94f290d96bc593)
Applied cleanly.

https://virtuozzo.atlassian.net/browse/VSTOR-127529
Signed-off-by: Konstantin Khorenko <khorenko at virtuozzo.com>

Feature: fix selftests
---
 tools/testing/selftests/mm/write_to_hugetlbfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/mm/write_to_hugetlbfs.c b/tools/testing/selftests/mm/write_to_hugetlbfs.c
index 1289d311efd7..34c91f7e6128 100644
--- a/tools/testing/selftests/mm/write_to_hugetlbfs.c
+++ b/tools/testing/selftests/mm/write_to_hugetlbfs.c
@@ -89,7 +89,7 @@ int main(int argc, char **argv)
 			size = atoi(optarg);
 			break;
 		case 'p':
-			strncpy(path, optarg, sizeof(path));
+			strncpy(path, optarg, sizeof(path) - 1);
 			break;
 		case 'm':
 			if (atoi(optarg) >= MAX_METHOD) {
-- 
2.47.1