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authorAl Viro <viro@zeniv.linux.org.uk>2020-02-18 12:42:57 -0500
committerAl Viro <viro@zeniv.linux.org.uk>2020-05-29 11:03:03 -0400
commit1a4b8febb6c13766f1af91058b90fee876e11674 (patch)
treed7e5c3a6c5aa7b3ff5f36a459d9e7ede9186228a /drivers
parent00fca6b53a88f600c59bae3828e1c2fdce58be0d (diff)
n_hdlc_tty_read(): remove pointless access_ok()
only copy_to_user() is done to the address in question Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/tty/n_hdlc.c7
1 files changed, 0 insertions, 7 deletions
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 (;;) {