V4L/DVB (5490): Drivers/media/video/se401.c: check kmalloc() return value.
authorAmit Choudhary <amit2030@gmail.com>
Fri, 30 Mar 2007 20:48:59 +0000 (17:48 -0300)
committerMauro Carvalho Chehab <mchehab@infradead.org>
Fri, 27 Apr 2007 18:45:21 +0000 (15:45 -0300)
Check the return value of kmalloc() in function se401_start_stream(), in
file drivers/media/video/se401.c.

Signed-off-by: Amit Choudhary <amit2030@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
drivers/media/video/se401.c

index 038448f5a9781f3e5ea6463c00d411543fe9e2f4..93fb04ed99a040d2e28512e21505e424f3133e69 100644 (file)
@@ -450,6 +450,13 @@ static int se401_start_stream(struct usb_se401 *se401)
        }
        for (i=0; i<SE401_NUMSBUF; i++) {
                se401->sbuf[i].data=kmalloc(SE401_PACKETSIZE, GFP_KERNEL);
+               if (!se401->sbuf[i].data) {
+                       for(i = i - 1; i >= 0; i--) {
+                               kfree(se401->sbuf[i].data);
+                               se401->sbuf[i].data = NULL;
+                       }
+                       return -ENOMEM;
+               }
        }
 
        se401->bayeroffset=0;
@@ -458,13 +465,26 @@ static int se401_start_stream(struct usb_se401 *se401)
        se401->scratch_overflow=0;
        for (i=0; i<SE401_NUMSCRATCH; i++) {
                se401->scratch[i].data=kmalloc(SE401_PACKETSIZE, GFP_KERNEL);
+               if (!se401->scratch[i].data) {
+                       for(i = i - 1; i >= 0; i--) {
+                               kfree(se401->scratch[i].data);
+                               se401->scratch[i].data = NULL;
+                       }
+                       goto nomem_sbuf;
+               }
                se401->scratch[i].state=BUFFER_UNUSED;
        }
 
        for (i=0; i<SE401_NUMSBUF; i++) {
                urb=usb_alloc_urb(0, GFP_KERNEL);
-               if(!urb)
-                       return -ENOMEM;
+               if(!urb) {
+                       for(i = i - 1; i >= 0; i--) {
+                               usb_kill_urb(se401->urb[i]);
+                               usb_free_urb(se401->urb[i]);
+                               se401->urb[i] = NULL;
+                       }
+                       goto nomem_scratch;
+               }
 
                usb_fill_bulk_urb(urb, se401->dev,
                        usb_rcvbulkpipe(se401->dev, SE401_VIDEO_ENDPOINT),
@@ -482,6 +502,18 @@ static int se401_start_stream(struct usb_se401 *se401)
        se401->framecount=0;
 
        return 0;
+
+ nomem_scratch:
+       for (i=0; i<SE401_NUMSCRATCH; i++) {
+               kfree(se401->scratch[i].data);
+               se401->scratch[i].data = NULL;
+       }
+ nomem_sbuf:
+       for (i=0; i<SE401_NUMSBUF; i++) {
+               kfree(se401->sbuf[i].data);
+               se401->sbuf[i].data = NULL;
+       }
+       return -ENOMEM;
 }
 
 static int se401_stop_stream(struct usb_se401 *se401)