V4L/DVB (5490): Drivers/media/video/se401.c: check kmalloc() return value.

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>

1 files changed, 34 insertions, 2 deletions

diff --git a/drivers/media/video/se401.c b/drivers/media/video/se401.c
index 038448f5a978..93fb04ed99a0 100644
--- a/drivers/media/video/se401.c
+++ b/drivers/media/video/se401.c
@@ -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)