From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:39948 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751418AbdJEJC7 (ORCPT ); Thu, 5 Oct 2017 05:02:59 -0400 Subject: Patch "net: core: Prevent from dereferencing null pointer when releasing SKB" has been added to the 3.18-stable tree To: mhjungk@gmail.com, alexander.levin@verizon.com, davem@davemloft.net, gregkh@linuxfoundation.org Cc: , From: Date: Thu, 05 Oct 2017 11:02:37 +0200 Message-ID: <150719415719191@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: 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 know about it. >>From foo@baz Thu Oct 5 10:58:04 CEST 2017 From: Myungho Jung Date: Tue, 25 Apr 2017 11:58:15 -0700 Subject: net: core: Prevent from dereferencing null pointer when releasing SKB From: Myungho Jung [ Upstream commit 9899886d5e8ec5b343b1efe44f185a0e68dc6454 ] Added NULL check to make __dev_kfree_skb_irq consistent with kfree family of functions. Link: https://bugzilla.kernel.org/show_bug.cgi?id=195289 Signed-off-by: Myungho Jung Signed-off-by: David S. Miller Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- net/core/dev.c | 3 +++ 1 file changed, 3 insertions(+) --- a/net/core/dev.c +++ b/net/core/dev.c @@ -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 mhjungk@gmail.com are queue-3.18/net-core-prevent-from-dereferencing-null-pointer-when-releasing-skb.patch