1 files changed, 10 insertions, 3 deletions

diff --git a/fs/nls/nls_utf8.c b/fs/nls/nls_utf8.c
index aa2c42fdd977..0d60a44acacd 100644
--- a/fs/nls/nls_utf8.c
+++ b/fs/nls/nls_utf8.c
@@ -15,7 +15,11 @@ static int uni2char(wchar_t uni, unsigned char *out, int boundlen)
 {
         int n;
 
-        if ( (n = utf8_wctomb(out, uni, boundlen)) == -1) {
+        if (boundlen <= 0)
+                return -ENAMETOOLONG;
+
+        n = utf32_to_utf8(uni, out, boundlen);
+        if (n < 0) {
                 *out = '?';
                 return -EINVAL;
         }
@@ -25,11 +29,14 @@ static int uni2char(wchar_t uni, unsigned char *out, int boundlen)
 static int char2uni(const unsigned char *rawstring, int boundlen, wchar_t *uni)
 {
         int n;
+        unicode_t u;
 
-        if ( (n = utf8_mbtowc(uni, rawstring, boundlen)) == -1) {
+        n = utf8_to_utf32(rawstring, boundlen, &u);
+        if (n < 0 || u > MAX_WCHAR_T) {
                 *uni = 0x003f;  /* ? */
-                n = -EINVAL;
+                return -EINVAL;
         }
+        *uni = (wchar_t) u;
         return n;
 }