4.4-stable review patch. If anyone has any objections, please let me know.
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From: Alan Stern stern@rowland.harvard.edu
commit 7c80f9e4a588f1925b07134bb2e3689335f6c6d8 upstream.
If the usbtest driver encounters a device with an IN bulk endpoint but no OUT bulk endpoint, it will try to dereference a NULL pointer (out->desc.bEndpointAddress). The problem can be solved by adding a missing test.
Signed-off-by: Alan Stern stern@rowland.harvard.edu Reported-by: Andrey Konovalov andreyknvl@google.com Tested-by: Andrey Konovalov andreyknvl@google.com Signed-off-by: Felipe Balbi felipe.balbi@linux.intel.com Cc: Ben Hutchings ben.hutchings@codethink.co.uk Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/usb/misc/usbtest.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
--- a/drivers/usb/misc/usbtest.c +++ b/drivers/usb/misc/usbtest.c @@ -185,12 +185,13 @@ found: return tmp; }
- if (in) { + if (in) dev->in_pipe = usb_rcvbulkpipe(udev, in->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); + if (out) dev->out_pipe = usb_sndbulkpipe(udev, out->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); - } + if (iso_in) { dev->iso_in = &iso_in->desc; dev->in_iso_pipe = usb_rcvisocpipe(udev,