From 1a4b8febb6c13766f1af91058b90fee876e11674 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Tue, 18 Feb 2020 12:42:57 -0500 Subject: n_hdlc_tty_read(): remove pointless access_ok() only copy_to_user() is done to the address in question Reviewed-by: Greg Kroah-Hartman Signed-off-by: Al Viro --- drivers/tty/n_hdlc.c | 7 ------- 1 file changed, 7 deletions(-) (limited to 'drivers/tty/n_hdlc.c') diff --git a/drivers/tty/n_hdlc.c b/drivers/tty/n_hdlc.c index 991f49ee4026..b09eac4b6d64 100644 --- a/drivers/tty/n_hdlc.c +++ b/drivers/tty/n_hdlc.c @@ -423,13 +423,6 @@ static ssize_t n_hdlc_tty_read(struct tty_struct *tty, struct file *file, struct n_hdlc_buf *rbuf; DECLARE_WAITQUEUE(wait, current); - /* verify user access to buffer */ - if (!access_ok(buf, nr)) { - pr_warn("%s(%d) %s() can't verify user buffer\n", - __FILE__, __LINE__, __func__); - return -EFAULT; - } - add_wait_queue(&tty->read_wait, &wait); for (;;) { -- cgit