Staging: Use kmemdup

Use kmemdup when some other buffer is immediately copied into the
allocated region.

A simplified version of the semantic patch that makes this change is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
expression from,to,size,flag;
statement S;
@@

-  to = \(kmalloc\|kzalloc\)(size,flag);
+  to = kmemdup(from,size,flag);
   if (to==NULL || ...) S
-  memcpy(to, from, size);
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/comedi/drivers/usbdux.c

@@ -840,13 +840,12 @@ static int firmwareUpload(struct usbduxsub *usbduxsub,
 	}
 
 	/* we generate a local buffer for the firmware */
-	fwBuf = kzalloc(sizeFirmware, GFP_KERNEL);
+	fwBuf = kmemdup(firmwareBinary, sizeFirmware, GFP_KERNEL);
 	if (!fwBuf) {
 		dev_err(&usbduxsub->interface->dev,
 			"comedi_: mem alloc for firmware failed\n");
 		return -ENOMEM;
 	}
-	memcpy(fwBuf, firmwareBinary, sizeFirmware);
 
 	ret = usbduxsub_stop(usbduxsub);
 	if (ret < 0) {

drivers/staging/comedi/drivers/usbduxfast.c

@@ -1368,13 +1368,12 @@ static int firmwareUpload(struct usbduxfastsub_s *usbduxfastsub,
 	}
 
 	/* we generate a local buffer for the firmware */
-	fwBuf = kzalloc(sizeFirmware, GFP_KERNEL);
+	fwBuf = kmemdup(firmwareBinary, sizeFirmware, GFP_KERNEL);
 	if (!fwBuf) {
 		dev_err(&usbduxfastsub->interface->dev,
 			"comedi_: mem alloc for firmware failed\n");
 		return -ENOMEM;
 	}
-	memcpy(fwBuf, firmwareBinary, sizeFirmware);
 
 	ret = usbduxfastsub_stop(usbduxfastsub);
 	if (ret < 0) {

drivers/staging/hv/vmbus.c

@@ -185,11 +185,10 @@ static void VmbusOnMsgDPC(struct hv_driver *drv)
 			/* no msg */
 			break;
 		} else {
-			copied = kmalloc(sizeof(*copied), GFP_ATOMIC);
+			copied = kmemdup(msg, sizeof(*copied), GFP_ATOMIC);
 			if (copied == NULL)
 				continue;
 
-			memcpy(copied, msg, sizeof(*copied));
 			osd_schedule_callback(gVmbusConnection.WorkQueue,
 					      VmbusOnChannelMessage,
 					      (void *)copied);

drivers/staging/line6/dumprequest.c

@@ -105,10 +105,9 @@ int line6_wait_dump(struct line6_dump_request *l6dr, int nonblock)
 int line6_dumpreq_initbuf(struct line6_dump_request *l6dr, const void *buf,
 			  size_t len, int num)
 {
-	l6dr->reqbufs[num].buffer = kmalloc(len, GFP_KERNEL);
+	l6dr->reqbufs[num].buffer = kmemdup(buf, len, GFP_KERNEL);
 	if (l6dr->reqbufs[num].buffer == NULL)
 		return -ENOMEM;
-	memcpy(l6dr->reqbufs[num].buffer, buf, len);
 	l6dr->reqbufs[num].length = len;
 	return 0;
 }

drivers/staging/line6/pod.c

@@ -1074,7 +1074,8 @@ int pod_init(struct usb_interface *interface, struct usb_line6_pod *pod)
 		return -ENOMEM;
 	}
 
-	pod->buffer_versionreq = kmalloc(sizeof(pod_request_version),
+	pod->buffer_versionreq = kmemdup(pod_request_version,
+					 sizeof(pod_request_version),
 					 GFP_KERNEL);
 
 	if (pod->buffer_versionreq == NULL) {
@@ -1083,9 +1084,6 @@ int pod_init(struct usb_interface *interface, struct usb_line6_pod *pod)
 		return -ENOMEM;
 	}
 
-	memcpy(pod->buffer_versionreq, pod_request_version,
-	       sizeof(pod_request_version));
-
 	/* create sysfs entries: */
 	err = pod_create_files2(&interface->dev);
 	if (err < 0) {

drivers/staging/line6/variax.c

@@ -486,7 +486,8 @@ int variax_init(struct usb_interface *interface,
 		return err;
 	}
 
-	variax->buffer_activate = kmalloc(sizeof(variax_activate), GFP_KERNEL);
+	variax->buffer_activate = kmemdup(variax_activate,
+					  sizeof(variax_activate), GFP_KERNEL);
 
 	if (variax->buffer_activate == NULL) {
 		dev_err(&interface->dev, "Out of memory\n");
@@ -494,8 +495,6 @@ int variax_init(struct usb_interface *interface,
 		return -ENOMEM;
 	}
 
-	memcpy(variax->buffer_activate, variax_activate,
-	       sizeof(variax_activate));
 	init_timer(&variax->activate_timer);
 
 	/* create sysfs entries: */

drivers/staging/pohmelfs/config.c

@@ -204,18 +204,18 @@ int pohmelfs_copy_crypto(struct pohmelfs_sb *psb)
 	}
 
 	if (g->hash_keysize) {
-		psb->hash_key = kmalloc(g->hash_keysize, GFP_KERNEL);
+		psb->hash_key = kmemdup(g->hash_key, g->hash_keysize,
+					GFP_KERNEL);
 		if (!psb->hash_key)
 			goto err_out_free_cipher_string;
-		memcpy(psb->hash_key, g->hash_key, g->hash_keysize);
 		psb->hash_keysize = g->hash_keysize;
 	}
 
 	if (g->cipher_keysize) {
-		psb->cipher_key = kmalloc(g->cipher_keysize, GFP_KERNEL);
+		psb->cipher_key = kmemdup(g->cipher_key, g->cipher_keysize,
+					  GFP_KERNEL);
 		if (!psb->cipher_key)
 			goto err_out_free_hash;
-		memcpy(psb->cipher_key, g->cipher_key, g->cipher_keysize);
 		psb->cipher_keysize = g->cipher_keysize;
 	}
 
@@ -454,14 +454,12 @@ static int pohmelfs_crypto_hash_init(struct pohmelfs_config_group *g, struct poh
 	g->hash_strlen = c->strlen;
 	g->hash_keysize = c->keysize;
 
-	g->hash_key = kmalloc(c->keysize, GFP_KERNEL);
+	g->hash_key = kmemdup(key, c->keysize, GFP_KERNEL);
 	if (!g->hash_key) {
 		kfree(g->hash_string);
 		return -ENOMEM;
 	}
 
-	memcpy(g->hash_key, key, c->keysize);
-
 	return 0;
 }
 
@@ -479,14 +477,12 @@ static int pohmelfs_crypto_cipher_init(struct pohmelfs_config_group *g, struct p
 	g->cipher_strlen = c->strlen;
 	g->cipher_keysize = c->keysize;
 
-	g->cipher_key = kmalloc(c->keysize, GFP_KERNEL);
+	g->cipher_key = kmemdup(key, c->keysize, GFP_KERNEL);
 	if (!g->cipher_key) {
 		kfree(g->cipher_string);
 		return -ENOMEM;
 	}
 
-	memcpy(g->cipher_key, key, c->keysize);
-
 	return 0;
 }
 

drivers/staging/rtl8187se/ieee80211/ieee80211_softmac.c

@@ -2667,11 +2667,11 @@ static int ieee80211_wpa_set_wpa_ie(struct ieee80211_device *ieee,
 		return -EINVAL;
 
 	if (param->u.wpa_ie.len) {
-		buf = kmalloc(param->u.wpa_ie.len, GFP_KERNEL);
+		buf = kmemdup(param->u.wpa_ie.data, param->u.wpa_ie.len,
+			      GFP_KERNEL);
 		if (buf == NULL)
 			return -ENOMEM;
 
-		memcpy(buf, param->u.wpa_ie.data, param->u.wpa_ie.len);
 		kfree(ieee->wpa_ie);
 		ieee->wpa_ie = buf;
 		ieee->wpa_ie_len = param->u.wpa_ie.len;

drivers/staging/rtl8187se/ieee80211/ieee80211_wx.c

@@ -727,10 +727,9 @@ int ieee80211_wx_set_gen_ie(struct ieee80211_device *ieee, u8 *ie, size_t len)
 			printk("len:%zu, ie:%d\n", len, ie[1]);
 			return -EINVAL;
 		}
-		buf = kmalloc(len, GFP_KERNEL);
+		buf = kmemdup(ie, len, GFP_KERNEL);
 		if (buf == NULL)
 			return -ENOMEM;
-		memcpy(buf, ie, len);
 		kfree(ieee->wpa_ie);
 		ieee->wpa_ie = buf;
 		ieee->wpa_ie_len = len;

drivers/staging/rtl8192e/ieee80211/ieee80211_softmac.c

@@ -3255,11 +3255,11 @@ static int ieee80211_wpa_set_wpa_ie(struct ieee80211_device *ieee,
 		return -EINVAL;
 
 	if (param->u.wpa_ie.len) {
-		buf = kmalloc(param->u.wpa_ie.len, GFP_KERNEL);
+		buf = kmemdup(param->u.wpa_ie.data, param->u.wpa_ie.len,
+			      GFP_KERNEL);
 		if (buf == NULL)
 			return -ENOMEM;
 
-		memcpy(buf, param->u.wpa_ie.data, param->u.wpa_ie.len);
 		kfree(ieee->wpa_ie);
 		ieee->wpa_ie = buf;
 		ieee->wpa_ie_len = param->u.wpa_ie.len;

drivers/staging/rtl8192e/ieee80211/ieee80211_wx.c

@@ -979,10 +979,9 @@ int ieee80211_wx_set_gen_ie(struct ieee80211_device *ieee, u8 *ie, size_t len)
 			printk("len:%zu, ie:%d\n", len, ie[1]);
 			return -EINVAL;
 		}
-		buf = kmalloc(len, GFP_KERNEL);
+		buf = kmemdup(ie, len, GFP_KERNEL);
 		if (buf == NULL)
 			return -ENOMEM;
-		memcpy(buf, ie, len);
 		kfree(ieee->wpa_ie);
 		ieee->wpa_ie = buf;
 		ieee->wpa_ie_len = len;

drivers/staging/rtl8192su/ieee80211/ieee80211_softmac.c

@@ -2844,11 +2844,11 @@ static int ieee80211_wpa_set_wpa_ie(struct ieee80211_device *ieee,
 		return -EINVAL;
 
 	if (param->u.wpa_ie.len) {
-		buf = kmalloc(param->u.wpa_ie.len, GFP_KERNEL);
+		buf = kmemdup(param->u.wpa_ie.data, param->u.wpa_ie.len,
+			      GFP_KERNEL);
 		if (buf == NULL)
 			return -ENOMEM;
 
-		memcpy(buf, param->u.wpa_ie.data, param->u.wpa_ie.len);
 		kfree(ieee->wpa_ie);
 		ieee->wpa_ie = buf;
 		ieee->wpa_ie_len = param->u.wpa_ie.len;

drivers/staging/rtl8192su/ieee80211/ieee80211_wx.c

@@ -767,10 +767,9 @@ int ieee80211_wx_set_gen_ie(struct ieee80211_device *ieee, u8 *ie, size_t len)
 			printk("len: %Zd, ie:%d\n", len, ie[1]);
 			return -EINVAL;
 		}
-		buf = kmalloc(len, GFP_KERNEL);
+		buf = kmemdup(ie, len, GFP_KERNEL);
 		if (buf == NULL)
 			return -ENOMEM;
-		memcpy(buf, ie, len);
 		kfree(ieee->wpa_ie);
 		ieee->wpa_ie = buf;
 		ieee->wpa_ie_len = len;

drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c

@@ -1579,10 +1579,9 @@ static inline u16 auth_parse(struct sk_buff *skb, u8** challenge, int *chlen)
 
 		if(*(t++) == MFIE_TYPE_CHALLENGE){
 			*chlen = *(t++);
-			*challenge = kmalloc(*chlen, GFP_ATOMIC);
+			*challenge = kmemdup(t, *chlen, GFP_ATOMIC);
 			if (!*challenge)
 				return -ENOMEM;
-			memcpy(*challenge, t, *chlen);
 		}
 	}
 
@@ -2870,11 +2869,11 @@ static int ieee80211_wpa_set_wpa_ie(struct ieee80211_device *ieee,
 		return -EINVAL;
 
 	if (param->u.wpa_ie.len) {
-		buf = kmalloc(param->u.wpa_ie.len, GFP_KERNEL);
+		buf = kmemdup(param->u.wpa_ie.data, param->u.wpa_ie.len,
+			      GFP_KERNEL);
 		if (buf == NULL)
 			return -ENOMEM;
 
-		memcpy(buf, param->u.wpa_ie.data, param->u.wpa_ie.len);
 		kfree(ieee->wpa_ie);
 		ieee->wpa_ie = buf;
 		ieee->wpa_ie_len = param->u.wpa_ie.len;

drivers/staging/rtl8192u/ieee80211/ieee80211_wx.c

@@ -847,10 +847,9 @@ int ieee80211_wx_set_gen_ie(struct ieee80211_device *ieee, u8 *ie, size_t len)
 			printk("len:%zu, ie:%d\n", len, ie[1]);
 			return -EINVAL;
 		}
-		buf = kmalloc(len, GFP_KERNEL);
+		buf = kmemdup(ie, len, GFP_KERNEL);
 		if (buf == NULL)
 			return -ENOMEM;
-		memcpy(buf, ie, len);
 		kfree(ieee->wpa_ie);
 		ieee->wpa_ie = buf;
 		ieee->wpa_ie_len = len;

drivers/staging/usbip/stub_rx.c

@@ -502,13 +502,13 @@ static void stub_recv_cmd_submit(struct stub_device *sdev,
 	}
 
 	/* set priv->urb->setup_packet */
-	priv->urb->setup_packet = kzalloc(8, GFP_KERNEL);
+	priv->urb->setup_packet = kmemdup(&pdu->u.cmd_submit.setup, 8,
+					  GFP_KERNEL);
 	if (!priv->urb->setup_packet) {
 		dev_err(&sdev->interface->dev, "allocate setup_packet\n");
 		usbip_event_add(ud, SDEV_EVENT_ERROR_MALLOC);
 		return;
 	}
-	memcpy(priv->urb->setup_packet, &pdu->u.cmd_submit.setup, 8);
 
 	/* set other members from the base header of pdu */
 	priv->urb->context                = (void *) priv;