[PATCH v2 3/4] fs: unicode: Use strscpy() instead of strncpy()

[Shreeya Patel]

Following warning was reported by Kernel Test Robot.

In function 'utf8_parse_version',
inlined from 'utf8_load' at fs/unicode/utf8mod.c:195:7:
>> fs/unicode/utf8mod.c:175:2: warning: 'strncpy' specified bound 12 equals
destination size [-Wstringop-truncation]
175 |  strncpy(version_string, version, sizeof(version_string));
    |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

The -Wstringop-truncation warning highlights the unintended
uses of the strncpy function that truncate the terminating NULL
character from the source string.
Unlike strncpy(), strscpy() always null-terminates the destination string,
hence use strscpy() instead of strncpy().

Signed-off-by: Shreeya Patel <shreeya.pa...@collabora.com>
Reported-by: kernel test robot <l...@intel.com>
---
Changes in v2
  - Resolve warning of -Wstringop-truncation reported by
    kernel test robot.

 fs/unicode/unicode-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/unicode/unicode-core.c b/fs/unicode/unicode-core.c
index d5f09e022ac5..287a8a48836c 100644
--- a/fs/unicode/unicode-core.c
+++ b/fs/unicode/unicode-core.c
@@ -179,7 +179,7 @@ static int unicode_parse_version(const char *version, 
unsigned int *maj,
                {0, NULL}
        };
 
-       strncpy(version_string, version, sizeof(version_string));
+       strscpy(version_string, version, sizeof(version_string));
 
        if (match_token(version_string, token, args) != 1)
                return -EINVAL;
-- 
2.30.1