[PATCH 3.16 17/63] usb: gadget: composite: fix dereference after null check coverify warning

[Ben Hutchings]

3.16.81-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Peter Chen <peter.chen@xxxxxxx>

commit c526c62d565ea5a5bba9433f28756079734f430d upstream.

cdev->config is checked for null pointer at above code, so cdev->config
might be null, fix it by adding null pointer check.

Signed-off-by: Peter Chen <peter.chen@xxxxxxx>
Signed-off-by: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
 drivers/usb/gadget/composite.c | 2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -1729,6 +1729,8 @@ unknown:
 			break;
 
 		case USB_RECIP_ENDPOINT:
+			if (!cdev->config)
+				break;
 			endp = ((w_index & 0x80) >> 3) | (w_index & 0x0f);
 			list_for_each_entry(f, &cdev->config->functions, list) {
 				if (test_bit(endp, f->endpoints))