lib/iov_iter.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/iov_iter.c b/lib/iov_iter.c
index e0aa6b440ca5..5236c16734e0 100644
--- a/lib/iov_iter.c
+++ b/lib/iov_iter.c
@@ -248,7 +248,10 @@ static __always_inline
 size_t memcpy_from_iter_mc(void *iter_from, size_t progress,
 			   size_t len, void *to, void *priv2)
 {
-	return copy_mc_to_kernel(to + progress, iter_from, len);
+	size_t n = copy_mc_to_kernel(to + progress, iter_from, len);
+	if (n)
+		memset(to + progress - n, 0, n);
+	return 0;
 }
 
 static size_t __copy_from_iter_mc(void *addr, size_t bytes, struct iov_iter *i)