iso data buffers may have holes in them if some packets were short, so for
iso urbs we should always copy the entire buffer, just like the regular
processcompl does.
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
CC: stable@xxxxxxxxxxxxxxx
---
drivers/usb/core/devio.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index 8df4b76..5c15acd 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -1598,10 +1598,14 @@ static int processcompl_compat(struct async *as, void __user * __user *arg)
void __user *addr = as->userurb;
unsigned int i;
- if (as->userbuffer && urb->actual_length)
- if (copy_to_user(as->userbuffer, urb->transfer_buffer,
- urb->actual_length))
+ if (as->userbuffer && urb->actual_length) {
+ if (urb->number_of_packets > 0) /* Isochronous */
+ i = urb->transfer_buffer_length;
+ else /* Non-Isoc */
+ i = urb->actual_length;
+ if (copy_to_user(as->userbuffer, urb->transfer_buffer, i))
return -EFAULT;
+ }
if (put_user(as->status, &userurb->status))
return -EFAULT;
if (put_user(urb->actual_length, &userurb->actual_length))
--
1.7.10.4
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
