# \[PATCH net-next 01/13\] net: Check skb for NULL in dev\_kfree\_skb\_irq

- From: Govindarajulu Varadarajan \<hidden\>
- Date: 2013-11-02 13:48:10 
- List: netdev
- Page: https://ratatoskr.run/netdev/2013/11/4142802
- Thread: https://ratatoskr.run/linux-wireless/2013/11/4142803/t.md

```text
Signed-off-by: Govindarajulu Varadarajan <redacted>
---
 net/core/dev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/core/dev.c b/net/core/dev.c
index 0054c8c..63bd44d 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2146,7 +2146,7 @@ EXPORT_SYMBOL(__netif_schedule);
 
 void dev_kfree_skb_irq(struct sk_buff *skb)
 {
-	if (atomic_dec_and_test(&skb->users)) {
+	if (skb && atomic_dec_and_test(&skb->users)) {
 		struct softnet_data *sd;
 		unsigned long flags;
 
-- 
1.8.4.2
```