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Patch "net: core: Prevent from dereferencing null pointer when releasing SKB" has been added to the 3.18-stable tree

PATCH [email protected] 1 participant 1 message Oct 5, 2017

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This is a note to let you know that I've just added the patch titled

net: core: Prevent from dereferencing null pointer when releasing SKB

to the 3.18-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
net-core-prevent-from-dereferencing-null-pointer-when-releasing-skb.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

Quoted 1 line

From foo@baz Thu Oct 5 10:58:04 CEST 2017

From: Myungho Jung <[email protected]>
Date: Tue, 25 Apr 2017 11:58:15 -0700
Subject: net: core: Prevent from dereferencing null pointer when releasing SKB

From: Myungho Jung <[email protected]>

[ Upstream commit 9899886d5e8ec5b343b1efe44f185a0e68dc6454 ]

Added NULL check to make __dev_kfree_skb_irq consistent with kfree family of functions.

---
 net/core/dev.c |    3 +++
 1 file changed, 3 insertions(+)
net/core/dev.c +3 -0
@@ -2225,6 +2225,9 @@ void __dev_kfree_skb_irq(struct sk_buff
 {
 	unsigned long flags;
 
+	if (unlikely(!skb))
+		return;
+
 	if (likely(atomic_read(&skb->users) == 1)) {
 		smp_rmb();
 		atomic_set(&skb->users, 0);

Patches currently in stable-queue which might be from [email protected] are

queue-3.18/net-core-prevent-from-dereferencing-null-pointer-when-releasing-skb.patch