diff options
| -rw-r--r-- | net/ipv4/tcp_probe.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/net/ipv4/tcp_probe.c b/net/ipv4/tcp_probe.c index 1c509592574..5ff0ce6e9d3 100644 --- a/net/ipv4/tcp_probe.c +++ b/net/ipv4/tcp_probe.c @@ -190,19 +190,18 @@ static ssize_t tcpprobe_read(struct file *file, char __user *buf, width = tcpprobe_sprint(tbuf, sizeof(tbuf)); - if (width < len) + if (cnt + width < len) tcp_probe.tail = (tcp_probe.tail + 1) % bufsize; spin_unlock_bh(&tcp_probe.lock); /* if record greater than space available return partial buffer (so far) */ - if (width >= len) + if (cnt + width >= len) break; - error = copy_to_user(buf + cnt, tbuf, width); - if (error) - break; + if (copy_to_user(buf + cnt, tbuf, width)) + return -EFAULT; cnt += width; } |