2006-10-20 05:59:41

by Amit Choudhary

Subject: [PATCH 2.6.19-rc2] [REVISED] drivers/media/video/stv680.c: check kmalloc() return value.

Description: Check the return value of kmalloc() in function stv680_start_stream(), in file drivers/media/video/stv680.c.

Signed-off-by: Amit Choudhary <[email protected]>

diff --git a/drivers/media/video/stv680.c b/drivers/media/video/stv680.c
index 6d1ef1e..f35c664 100644
--- a/drivers/media/video/stv680.c
+++ b/drivers/media/video/stv680.c
@@ -687,7 +687,11 @@ static int stv680_start_stream (struct u
stv680->sbuf[i].data = kmalloc (stv680->rawbufsize, GFP_KERNEL);
if (stv680->sbuf[i].data == NULL) {
PDEBUG (0, "STV(e): Could not kmalloc raw data buffer %i", i);
- return -1;
+ for (i = i - 1; i >= 0; i--) {
+ kfree(stv680->sbuf[i].data);
+ stv680->sbuf[i].data = NULL;
+ }
+ return -ENOMEM;
}
}

@@ -698,15 +702,25 @@ static int stv680_start_stream (struct u
stv680->scratch[i].data = kmalloc (stv680->rawbufsize, GFP_KERNEL);
if (stv680->scratch[i].data == NULL) {
PDEBUG (0, "STV(e): Could not kmalloc raw scratch buffer %i", i);
- return -1;
+ for (i = i - 1; i >= 0; i--) {
+ kfree(stv680->scratch[i].data);
+ stv680->scratch[i].data = NULL;
+ }
+ goto nomem_sbuf;
}
stv680->scratch[i].state = BUFFER_UNUSED;
}

for (i = 0; i < STV680_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(stv680->urb[i]);
+ usb_free_urb(stv680->urb[i]);
+ stv680->urb[i] = NULL;
+ }
+ goto nomem_scratch;
+ }

/* sbuf is urb->transfer_buffer, later gets memcpyed to scratch */
usb_fill_bulk_urb (urb, stv680->udev,
@@ -721,6 +735,18 @@ static int stv680_start_stream (struct u

stv680->framecount = 0;
return 0;
+
+ nomem_scratch:
+ for (i=0; i<STV680_NUMSCRATCH; i++) {
+ kfree(stv680->scratch[i].data);
+ stv680->scratch[i].data = NULL;
+ }
+ nomem_sbuf:
+ for (i=0; i<STV680_NUMSBUF; i++) {
+ kfree(stv680->sbuf[i].data);
+ stv680->sbuf[i].data = NULL;
+ }
+ return -ENOMEM;
}

static int stv680_stop_stream (struct usb_stv *stv680)