V4L/DVB (4990): Cpia2/cpia2_usb.c: fix error-path leak

Free previously allocated memory (in array elements) if kmalloc() returns
NULL in submit_urbs().

Signed-off-by: Amit Choudhary <amit2030@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/media/video/cpia2/cpia2_usb.c b/drivers/media/video/cpia2/cpia2_usb.c
index 28dc6a1a1e4..d8e929863a8 100644
--- a/drivers/media/video/cpia2/cpia2_usb.c
+++ b/drivers/media/video/cpia2/cpia2_usb.c
@@ -640,6 +640,10 @@ static int submit_urbs(struct camera_data *cam)
                 cam->sbuf[i].data =
                     kmalloc(FRAMES_PER_DESC * FRAME_SIZE_PER_DESC, GFP_KERNEL);
                 if (!cam->sbuf[i].data) {
+                        while (--i >= 0) {
+                                kfree(cam->sbuf[i].data);
+                                cam->sbuf[i].data = NULL;
+                        }
                         return -ENOMEM;
                 }
         }