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* [PATCH] staging: ft1000: fix skb, netdev, memory leaks
@ 2010-09-28 17:49 Vasiliy Kulikov
  2010-09-30 11:13 ` Greg KH
  0 siblings, 1 reply; 5+ messages in thread
From: Vasiliy Kulikov @ 2010-09-28 17:49 UTC (permalink / raw)
  To: kernel-janitors; +Cc: Greg Kroah-Hartman, Marek Belisko, devel, linux-kernel

ft1000_copy_up_pkt() doesn't free skb on errors.
init_ft1000_card() doesn't free netdev with free_netdev() but with kfree().
init_ft1000_card() doesn't check request_region()'s return value
and doesn't free region on error.

Signed-off-by: Vasiliy Kulikov <segooon@gmail.com>
---
 Compile tested.

 drivers/staging/ft1000/ft1000-pcmcia/ft1000_hw.c |   32 +++++++++++++--------
 1 files changed, 20 insertions(+), 12 deletions(-)

diff --git a/drivers/staging/ft1000/ft1000-pcmcia/ft1000_hw.c b/drivers/staging/ft1000/ft1000-pcmcia/ft1000_hw.c
index a6ba84c..eed7e94 100644
--- a/drivers/staging/ft1000/ft1000-pcmcia/ft1000_hw.c
+++ b/drivers/staging/ft1000/ft1000-pcmcia/ft1000_hw.c
@@ -1686,6 +1686,7 @@ int ft1000_copy_up_pkt(struct net_device *dev)
 			  tempword);
 		ft1000_flush_fifo(dev, DSP_PKTPHCKSUM_INFO);
 		info->stats.rx_errors++;
+		kfree_skb(skb);
 		return FAILURE;
 	}
 	//subtract the number of bytes read already
@@ -1711,6 +1712,7 @@ int ft1000_copy_up_pkt(struct net_device *dev)
 			*pbuffer++ = (u8) (tempword >> 8);
 			*pbuffer++ = (u8) tempword;
 			if (ft1000_chkcard(dev) == FALSE) {
+				kfree_skb(skb);
 				return FAILURE;
 			}
 		}
@@ -2236,15 +2238,17 @@ struct net_device *init_ft1000_card(unsigned short irq, int port,
 
 	if (request_irq(dev->irq, ft1000_interrupt, IRQF_SHARED, dev->name, dev)) {
 		printk(KERN_ERR "ft1000: Could not request_irq\n");
-		kfree(dev);
-		return (NULL);
+		goto err_dev;
 	}
 
-	request_region(dev->base_addr, 256, dev->name);
+	if (request_region(dev->base_addr, 256, dev->name) == NULL) {
+		printk(KERN_ERR "ft1000: Could not request_region\n");
+		goto err_irq;
+	}
 
 	if (register_netdev(dev) != 0) {
 		DEBUG(0, "ft1000: Could not register netdev");
-		return NULL;
+		goto err_reg;
 	}
 
 	info->AsicID = ft1000_read_reg(dev, FT1000_REG_ASIC_ID);
@@ -2252,19 +2256,13 @@ struct net_device *init_ft1000_card(unsigned short irq, int port,
 		DEBUG(0, "ft1000_hw: ELECTRABUZZ ASIC\n");
 		if (request_firmware(&fw_entry, "ft1000.img", fdev) != 0) {
 			printk(KERN_INFO "ft1000: Could not open ft1000.img\n");
-			unregister_netdev(dev);
-			free_irq(dev->irq, dev);
-			kfree(dev);
-			return NULL;
+			goto err_unreg;
 		}
 	} else {
 		DEBUG(0, "ft1000_hw: MAGNEMITE ASIC\n");
 		if (request_firmware(&fw_entry, "ft2000.img", fdev) != 0) {
 			printk(KERN_INFO "ft1000: Could not open ft2000.img\n");
-			unregister_netdev(dev);
-			free_irq(dev->irq, dev);
-			kfree(dev);
-			return NULL;
+			goto err_unreg;
 		}
 	}
 
@@ -2279,6 +2277,16 @@ struct net_device *init_ft1000_card(unsigned short irq, int port,
 		   dev->dev_addr[1], dev->dev_addr[2], dev->dev_addr[3],
 		   dev->dev_addr[4], dev->dev_addr[5]);
 	return dev;
+
+err_unreg:
+	unregister_netdev(dev);
+err_reg:
+	release_region(dev->base_addr, 256);
+err_irq:
+	free_irq(dev->irq, dev);
+err_dev:
+	free_netdev(dev);
+	return NULL;
 }
 
 EXPORT_SYMBOL(init_ft1000_card);
-- 
1.7.0.4


^ permalink raw reply related	[flat|nested] 5+ messages in thread
* [PATCH] staging: ft1000: fix skb, netdev, memory leaks
@ 2010-09-26  8:59 Vasiliy Kulikov
  0 siblings, 0 replies; 5+ messages in thread
From: Vasiliy Kulikov @ 2010-09-26  8:59 UTC (permalink / raw)
  To: kernel-janitors; +Cc: Greg Kroah-Hartman, Marek Belisko, devel, linux-kernel

ft1000_copy_up_pkt() doesn't free skb on errors.
init_ft1000_card() doesn't free netdev with free_netdev() but with kfree().
init_ft1000_card() doesn't check request_region()'s return value
and doesn't free region on error.
---
 Compile tested.

 drivers/staging/ft1000/ft1000-pcmcia/ft1000_hw.c |   32 +++++++++++++--------
 1 files changed, 20 insertions(+), 12 deletions(-)

diff --git a/drivers/staging/ft1000/ft1000-pcmcia/ft1000_hw.c b/drivers/staging/ft1000/ft1000-pcmcia/ft1000_hw.c
index a6ba84c..eed7e94 100644
--- a/drivers/staging/ft1000/ft1000-pcmcia/ft1000_hw.c
+++ b/drivers/staging/ft1000/ft1000-pcmcia/ft1000_hw.c
@@ -1686,6 +1686,7 @@ int ft1000_copy_up_pkt(struct net_device *dev)
 			  tempword);
 		ft1000_flush_fifo(dev, DSP_PKTPHCKSUM_INFO);
 		info->stats.rx_errors++;
+		kfree_skb(skb);
 		return FAILURE;
 	}
 	//subtract the number of bytes read already
@@ -1711,6 +1712,7 @@ int ft1000_copy_up_pkt(struct net_device *dev)
 			*pbuffer++ = (u8) (tempword >> 8);
 			*pbuffer++ = (u8) tempword;
 			if (ft1000_chkcard(dev) == FALSE) {
+				kfree_skb(skb);
 				return FAILURE;
 			}
 		}
@@ -2236,15 +2238,17 @@ struct net_device *init_ft1000_card(unsigned short irq, int port,
 
 	if (request_irq(dev->irq, ft1000_interrupt, IRQF_SHARED, dev->name, dev)) {
 		printk(KERN_ERR "ft1000: Could not request_irq\n");
-		kfree(dev);
-		return (NULL);
+		goto err_dev;
 	}
 
-	request_region(dev->base_addr, 256, dev->name);
+	if (request_region(dev->base_addr, 256, dev->name) == NULL) {
+		printk(KERN_ERR "ft1000: Could not request_region\n");
+		goto err_irq;
+	}
 
 	if (register_netdev(dev) != 0) {
 		DEBUG(0, "ft1000: Could not register netdev");
-		return NULL;
+		goto err_reg;
 	}
 
 	info->AsicID = ft1000_read_reg(dev, FT1000_REG_ASIC_ID);
@@ -2252,19 +2256,13 @@ struct net_device *init_ft1000_card(unsigned short irq, int port,
 		DEBUG(0, "ft1000_hw: ELECTRABUZZ ASIC\n");
 		if (request_firmware(&fw_entry, "ft1000.img", fdev) != 0) {
 			printk(KERN_INFO "ft1000: Could not open ft1000.img\n");
-			unregister_netdev(dev);
-			free_irq(dev->irq, dev);
-			kfree(dev);
-			return NULL;
+			goto err_unreg;
 		}
 	} else {
 		DEBUG(0, "ft1000_hw: MAGNEMITE ASIC\n");
 		if (request_firmware(&fw_entry, "ft2000.img", fdev) != 0) {
 			printk(KERN_INFO "ft1000: Could not open ft2000.img\n");
-			unregister_netdev(dev);
-			free_irq(dev->irq, dev);
-			kfree(dev);
-			return NULL;
+			goto err_unreg;
 		}
 	}
 
@@ -2279,6 +2277,16 @@ struct net_device *init_ft1000_card(unsigned short irq, int port,
 		   dev->dev_addr[1], dev->dev_addr[2], dev->dev_addr[3],
 		   dev->dev_addr[4], dev->dev_addr[5]);
 	return dev;
+
+err_unreg:
+	unregister_netdev(dev);
+err_reg:
+	release_region(dev->base_addr, 256);
+err_irq:
+	free_irq(dev->irq, dev);
+err_dev:
+	free_netdev(dev);
+	return NULL;
 }
 
 EXPORT_SYMBOL(init_ft1000_card);
-- 
1.7.0.4


^ permalink raw reply related	[flat|nested] 5+ messages in thread
end of thread, other threads:[~2010-09-30 20:02 UTC | newest]

Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2010-09-28 17:49 [PATCH] staging: ft1000: fix skb, netdev, memory leaks Vasiliy Kulikov
2010-09-30 11:13 ` Greg KH
2010-09-30 19:23   ` Vasiliy Kulikov
2010-09-30 19:53     ` Greg KH
  -- strict thread matches above, loose matches on Subject: below --
2010-09-26  8:59 Vasiliy Kulikov

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