1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/isdn/icn/icn.c b/drivers/isdn/icn/icn.c
index 6649f8bc9951..730bbd07ebc7 100644
--- a/drivers/isdn/icn/icn.c
+++ b/drivers/isdn/icn/icn.c
@@ -1010,7 +1010,8 @@ icn_readstatus(u_char __user *buf, int len, icn_card * card)
         for (p = buf, count = 0; count < len; p++, count++) {
                 if (card->msg_buf_read == card->msg_buf_write)
                         return count;
-                put_user(*card->msg_buf_read++, p);
+                if (put_user(*card->msg_buf_read++, p))
+                        return -EFAULT;
                 if (card->msg_buf_read > card->msg_buf_end)
                         card->msg_buf_read = card->msg_buf;
         }