From patchwork Wed Mar 9 00:27:52 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kamal Mostafa X-Patchwork-Id: 594611 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from huckleberry.canonical.com (huckleberry.canonical.com [91.189.94.19]) by ozlabs.org (Postfix) with ESMTP id B23A31401B5; Wed, 9 Mar 2016 11:33:47 +1100 (AEDT) Received: from localhost ([127.0.0.1] helo=huckleberry.canonical.com) by huckleberry.canonical.com with esmtp (Exim 4.76) (envelope-from ) id 1adS4P-0007y7-Ey; Wed, 09 Mar 2016 00:33:45 +0000 Received: from youngberry.canonical.com ([91.189.89.112]) by huckleberry.canonical.com with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.76) (envelope-from ) id 1adRyx-0004uJ-5u for kernel-team@lists.ubuntu.com; Wed, 09 Mar 2016 00:28:07 +0000 Received: from 1.general.kamal.us.vpn ([10.172.68.52] helo=fourier) by youngberry.canonical.com with esmtpsa (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.76) (envelope-from ) id 1adRyw-00032r-Ez; Wed, 09 Mar 2016 00:28:06 +0000 Received: from kamal by fourier with local (Exim 4.86) (envelope-from ) id 1adRyo-0007JL-Dl; Tue, 08 Mar 2016 16:27:58 -0800 From: Kamal Mostafa To: Eric Dumazet Subject: [3.19.y-ckt stable] Patch "ipv4: fix memory leaks in ip_cmsg_send() callers" has been added to the 3.19.y-ckt tree Date: Tue, 8 Mar 2016 16:27:52 -0800 Message-Id: <1457483272-28068-1-git-send-email-kamal@canonical.com> X-Mailer: git-send-email 2.7.0 X-Extended-Stable: 3.19 Cc: Kamal Mostafa , "David S . Miller" , Dmitry Vyukov , kernel-team@lists.ubuntu.com X-BeenThere: kernel-team@lists.ubuntu.com X-Mailman-Version: 2.1.14 Precedence: list List-Id: Kernel team discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: kernel-team-bounces@lists.ubuntu.com Sender: kernel-team-bounces@lists.ubuntu.com This is a note to let you know that I have just added a patch titled ipv4: fix memory leaks in ip_cmsg_send() callers to the linux-3.19.y-queue branch of the 3.19.y-ckt extended stable tree which can be found at: http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.19.y-queue This patch is scheduled to be released in version 3.19.8-ckt16. If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.19.y-ckt tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Kamal ---8<------------------------------------------------------------ From 9e16835913d58ef504e94f1c768b0d80d26844cf Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Thu, 4 Feb 2016 06:23:28 -0800 Subject: ipv4: fix memory leaks in ip_cmsg_send() callers [ Upstream commit 919483096bfe75dda338e98d56da91a263746a0a ] Dmitry reported memory leaks of IP options allocated in ip_cmsg_send() when/if this function returns an error. Callers are responsible for the freeing. Many thanks to Dmitry for the report and diagnostic. Reported-by: Dmitry Vyukov Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller Signed-off-by: Kamal Mostafa --- net/ipv4/ip_sockglue.c | 2 ++ net/ipv4/ping.c | 4 +++- net/ipv4/raw.c | 4 +++- net/ipv4/udp.c | 4 +++- 4 files changed, 11 insertions(+), 3 deletions(-) -- 2.7.0 diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c index 6b85adb..1cf0007 100644 --- a/net/ipv4/ip_sockglue.c +++ b/net/ipv4/ip_sockglue.c @@ -216,6 +216,8 @@ int ip_cmsg_send(struct net *net, struct msghdr *msg, struct ipcm_cookie *ipc, switch (cmsg->cmsg_type) { case IP_RETOPTS: err = cmsg->cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr)); + + /* Our caller is responsible for freeing ipc->opt */ err = ip_options_get(net, &ipc->opt, CMSG_DATA(cmsg), err < 40 ? err : 40); if (err) diff --git a/net/ipv4/ping.c b/net/ipv4/ping.c index c0db43d..cd1ce77 100644 --- a/net/ipv4/ping.c +++ b/net/ipv4/ping.c @@ -746,8 +746,10 @@ static int ping_v4_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *m if (msg->msg_controllen) { err = ip_cmsg_send(sock_net(sk), msg, &ipc, false); - if (err) + if (unlikely(err)) { + kfree(ipc.opt); return err; + } if (ipc.opt) free = 1; } diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c index 0bb68df..26db03c 100644 --- a/net/ipv4/raw.c +++ b/net/ipv4/raw.c @@ -545,8 +545,10 @@ static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, if (msg->msg_controllen) { err = ip_cmsg_send(sock_net(sk), msg, &ipc, false); - if (err) + if (unlikely(err)) { + kfree(ipc.opt); goto out; + } if (ipc.opt) free = 1; } diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c index 75f76d7..b833848 100644 --- a/net/ipv4/udp.c +++ b/net/ipv4/udp.c @@ -965,8 +965,10 @@ int udp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, if (msg->msg_controllen) { err = ip_cmsg_send(sock_net(sk), msg, &ipc, sk->sk_family == AF_INET6); - if (err) + if (unlikely(err)) { + kfree(ipc.opt); return err; + } if (ipc.opt) free = 1; connected = 0;