diff options
| author | Alan Stern <stern@rowland.harvard.edu> | 2017-09-29 10:54:24 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-11-18 11:11:05 +0100 |
| commit | de46c1adbea694109036d3e7dee1fa6250b72660 (patch) | |
| tree | fa568f923518616349ac85b8bf63890a8dabd160 | |
| parent | c93df40f3c73a74226e59bcfb1edb57ec979d0a7 (diff) | |
usb: usbtest: fix NULL pointer dereference
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>
| -rw-r--r-- | drivers/usb/misc/usbtest.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/usb/misc/usbtest.c b/drivers/usb/misc/usbtest.c index 2e947dc94e32..bc92a498ec03 100644 --- 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, |