diff options
| author |   Al Viro <viro@zeniv.linux.org.uk> | 2020-04-23 10:27:20 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2020-05-29 11:05:58 -0400 |
| commit | fe6bb59f4dd693ffb678224fe78fc69dda163c46 (patch) | |
| tree | e0dcc62270d8c2a0faa4679986203144caa48e15 | |
| parent | lpfc_debugfs: get rid of pointless access_ok() (diff) | |
| download | linux-dev-fe6bb59f4dd693ffb678224fe78fc69dda163c46.tar.xz linux-dev-fe6bb59f4dd693ffb678224fe78fc69dda163c46.zip | |
usb: get rid of pointless access_ok() calls
in all affected cases addresses are passed only to
copy_from()_user or copy_to_user().
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| -rw-r--r-- | drivers/usb/core/devices.c | 2 | ||||
| -rw-r--r-- | drivers/usb/core/devio.c | 9 | ||||
| -rw-r--r-- | drivers/usb/gadget/function/f_hid.c | 6 |
3 files changed, 0 insertions, 17 deletions
diff --git a/drivers/usb/core/devices.c b/drivers/usb/core/devices.c index 44f28a114c2b..94b6fa6e585e 100644 --- a/drivers/usb/core/devices.c +++ b/drivers/usb/core/devices.c @@ -598,8 +598,6 @@ static ssize_t usb_device_read(struct file *file, char __user *buf, return -EINVAL; if (nbytes <= 0) return 0; - if (!access_ok(buf, nbytes)) - return -EFAULT; mutex_lock(&usb_bus_idr_lock); /* print devices for all busses */ diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c index 6833c918abce..544769807ab8 100644 --- a/drivers/usb/core/devio.c +++ b/drivers/usb/core/devio.c @@ -1127,11 +1127,6 @@ static int proc_control(struct usb_dev_state *ps, void __user *arg) ctrl.bRequestType, ctrl.bRequest, ctrl.wValue, ctrl.wIndex, ctrl.wLength); if (ctrl.bRequestType & 0x80) { - if (ctrl.wLength && !access_ok(ctrl.data, - ctrl.wLength)) { - ret = -EINVAL; - goto done; - } pipe = usb_rcvctrlpipe(dev, 0); snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, NULL, 0); @@ -1216,10 +1211,6 @@ static int proc_bulk(struct usb_dev_state *ps, void __user *arg) } tmo = bulk.timeout; if (bulk.ep & 0x80) { - if (len1 && !access_ok(bulk.data, len1)) { - ret = -EINVAL; - goto done; - } snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, NULL, 0); usb_unlock_device(dev); diff --git a/drivers/usb/gadget/function/f_hid.c b/drivers/usb/gadget/function/f_hid.c index f3816a5c861e..df671acdd464 100644 --- a/drivers/usb/gadget/function/f_hid.c +++ b/drivers/usb/gadget/function/f_hid.c @@ -252,9 +252,6 @@ static ssize_t f_hidg_read(struct file *file, char __user *buffer, if (!count) return 0; - if (!access_ok(buffer, count)) - return -EFAULT; - spin_lock_irqsave(&hidg->read_spinlock, flags); #define READ_COND (!list_empty(&hidg->completed_out_req)) @@ -339,9 +336,6 @@ static ssize_t f_hidg_write(struct file *file, const char __user *buffer, unsigned long flags; ssize_t status = -ENOMEM; - if (!access_ok(buffer, count)) - return -EFAULT; - spin_lock_irqsave(&hidg->write_spinlock, flags); #define WRITE_COND (!hidg->write_pending) |