When `echo Y > /sys/module/usbcore/parameters/usbfs_snoop` and
usb_control_msg() returns error, a lot of kernel memory is dumped to dmesg
until unhandled kernel paging request occurs.
Signed-off-by: Michal Sojka <[email protected]>
Cc: [email protected]
---
drivers/usb/core/devio.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index a7131ad..37518df 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -802,7 +802,7 @@ static int proc_control(struct dev_state *ps, void __user *arg)
tbuf, ctrl.wLength, tmo);
usb_lock_device(dev);
snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE,
- tbuf, i);
+ tbuf, max(i, 0));
if ((i > 0) && ctrl.wLength) {
if (copy_to_user(ctrl.data, tbuf, i)) {
free_page((unsigned long)tbuf);
--
1.7.2.3