From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:57928 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751070AbdBWURq (ORCPT ); Thu, 23 Feb 2017 15:17:46 -0500 Subject: Patch "kcm: fix a null pointer dereference in kcm_sendmsg()" has been added to the 4.9-stable tree To: xiyou.wangcong@gmail.com, davem@davemloft.net, dvyukov@google.com, gregkh@linuxfoundation.org, tom@herbertland.com Cc: , From: Date: Thu, 23 Feb 2017 21:17:25 +0100 Message-ID: <148788104512568@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 kcm: fix a null pointer dereference in kcm_sendmsg() to the 4.9-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: kcm-fix-a-null-pointer-dereference-in-kcm_sendmsg.patch and it can be found in the queue-4.9 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 Feb 23 21:13:05 CET 2017 From: WANG Cong Date: Mon, 13 Feb 2017 11:13:16 -0800 Subject: kcm: fix a null pointer dereference in kcm_sendmsg() From: WANG Cong [ Upstream commit cd27b96bc13841ee7af25837a6ae86fee87273d6 ] In commit 98e3862ca2b1 ("kcm: fix 0-length case for kcm_sendmsg()") I tried to avoid skb allocation for 0-length case, but missed a check for NULL pointer in the non EOR case. Fixes: 98e3862ca2b1 ("kcm: fix 0-length case for kcm_sendmsg()") Reported-by: Dmitry Vyukov Cc: Tom Herbert Signed-off-by: Cong Wang Acked-by: Tom Herbert Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/kcm/kcmsock.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) --- a/net/kcm/kcmsock.c +++ b/net/kcm/kcmsock.c @@ -1044,8 +1044,10 @@ wait_for_memory: } else { /* Message not complete, save state */ partial_message: - kcm->seq_skb = head; - kcm_tx_msg(head)->last_skb = skb; + if (head) { + kcm->seq_skb = head; + kcm_tx_msg(head)->last_skb = skb; + } } KCM_STATS_ADD(kcm->stats.tx_bytes, copied); Patches currently in stable-queue which might be from xiyou.wangcong@gmail.com are queue-4.9/kcm-fix-0-length-case-for-kcm_sendmsg.patch queue-4.9/kcm-fix-a-null-pointer-dereference-in-kcm_sendmsg.patch