nls: utf8_wcstombs: use correct buffer size in error case

When utf8_wcstombs encounters a character that cannot be encoded, we
must not decrease the remaining output buffer size because nothing has
been written to the output buffer.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/fs/nls/nls_base.c b/fs/nls/nls_base.c
index 9b0efda..000736d 100644 (file)
--- a/fs/nls/nls_base.c
+++ b/fs/nls/nls_base.c
@@ -144,7 +144,6 @@ utf8_wcstombs(__u8 *s, const wchar_t *pwcs, int maxlen)
                        size = utf8_wctomb(op, *ip, maxlen);
                        if (size == -1) {
                                /* Ignore character and move on */
-                               maxlen--;
                        } else {
                                op += size;
                                maxlen -= size;