From nobody Tue Apr 7 07:07:30 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A1873ECAAD8 for ; Tue, 30 Aug 2022 07:03:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230406AbiH3HDx (ORCPT ); Tue, 30 Aug 2022 03:03:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58096 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230388AbiH3HDt (ORCPT ); Tue, 30 Aug 2022 03:03:49 -0400 Received: from mail-pf1-x431.google.com (mail-pf1-x431.google.com [IPv6:2607:f8b0:4864:20::431]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0BF109DFA4; Tue, 30 Aug 2022 00:03:48 -0700 (PDT) Received: by mail-pf1-x431.google.com with SMTP id y141so10471233pfb.7; Tue, 30 Aug 2022 00:03:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc; bh=P+sb9Ku8woiZSO8lvNnm4FCZUFPAW73ZlQftiOI/Zus=; b=OEw3+guJoCnoto/64sdCSG4gz1yFKLp9/hy8fRnMHY+gIm2POkhKA9CX1nHQ3s8m6g Lck7fa13vgbUEbl/qE/LtlSuEn7M8JTsV0WDj3SsQK8pvm267kO3tK00PGMFdhez+ANt 6OFjgY16Hs1OP33boCPlpqJP3ePO2sf+lB7z4EHiHaK8EBQcyll76p5YfS8PMlU6rLtA Om+phS5zP2xuQrYAMgY6dE73KVxqNmHkA24bZtFIg9XuKVpSrVjk3izTL4Siz+HvO+J0 HMlMBUYihpkZiQawWaM3efIn0d+yEdoYj1fgxFpOpdKH8r974RVP0mFfVyaPelKoQOqt q/8A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc; bh=P+sb9Ku8woiZSO8lvNnm4FCZUFPAW73ZlQftiOI/Zus=; b=Gp9pQp4rKey1YVBjJhLpAaC9Aye5PU4i98Y6NlSN9QyVkoeRiwQoY6wZPq0HBDSFhJ 52OIHrC814gNS+tslit0QgHh+cssTS/3eJvJq+kEuo1IEn91dVXckCSeRpF82ZqVz7zp 0v0XPbZ8YrkLmrHzgvY0fL8Ztj3xGJbgoEVEcrVGBYUNY/ec/Dz7otuHrG1xr+mU44JH yMgh0qlCZ8+N3LCqShxzDFCoxJ+NmpBVPdFj8HLFCAtudSzCzlF6JiRZbC/qYaeY6h+b jwbg/o+4ZPQ4IICYAJVRegWCxJbPWSWtLjVv5ZbgBORIyvAq1HKxHPtCLBKueoXEAnAN XiRA== X-Gm-Message-State: ACgBeo0806RDznnC/X1hhmR+JrcVX6M5zhuk3hByXBtiDT0BsesFjEMi 3WPhzOSlihU0i3y79tWsfxE= X-Google-Smtp-Source: AA6agR4N6BzPNq3P6D/IwXVxMBqtIkdYQ03y8+U6V2V+FkrtnlyCCXcRI3ouKAja60bzu+Cr+t1pIQ== X-Received: by 2002:a63:491f:0:b0:41d:89d5:b3e7 with SMTP id w31-20020a63491f000000b0041d89d5b3e7mr16896017pga.18.1661843027489; Tue, 30 Aug 2022 00:03:47 -0700 (PDT) Received: from localhost.localdomain ([150.109.151.50]) by smtp.gmail.com with ESMTPSA id o186-20020a62cdc3000000b005289a50e4c2sm8473221pfg.23.2022.08.30.00.03.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 30 Aug 2022 00:03:47 -0700 (PDT) From: Haimin Zhang X-Google-Original-From: Haimin Zhang To: alex.aring@gmail.com, stefan@datenfreihafen.org, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, linux-wpan@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Haimin Zhang Subject: [PATCH V2] net/ieee802154: fix uninit value bug in dgram_sendmsg Date: Tue, 30 Aug 2022 15:03:39 +0800 Message-Id: <20220830070339.494695-1-tcs_kernel@tencent.com> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" There is uninit value bug in dgram_sendmsg function in net/ieee802154/socket.c when the length of valid data pointed by the msg->msg_name isn't verified. We should check the msg_namelen is not less than struct=20 sockaddr_ieee802154 when addr_type is SHORT before calling=20 ieee802154_addr_from_sa. So we define IEEE802154_MIN_NAMELEN. And in function ieee802154_addr_from_sa, when=20 addr_type is LONG, we check msg_namelen is not less than=20 sizeof(struct sockaddr_ieee802154). Meanwhile we check in the=20 beginning of function dgram_sendmsg. Also fixed in raw_bind, dgram_bind, dgram_connect. Signed-off-by: Haimin Zhang --- include/net/ieee802154_netdev.h | 9 ++++-- net/ieee802154/socket.c | 52 ++++++++++++++++++++------------- 2 files changed, 39 insertions(+), 22 deletions(-) diff --git a/include/net/ieee802154_netdev.h b/include/net/ieee802154_netde= v.h index d0d188c32..e1dc3fb02 100644 --- a/include/net/ieee802154_netdev.h +++ b/include/net/ieee802154_netdev.h @@ -165,8 +165,8 @@ static inline void ieee802154_devaddr_to_raw(void *raw,= __le64 addr) memcpy(raw, &temp, IEEE802154_ADDR_LEN); } =20 -static inline void ieee802154_addr_from_sa(struct ieee802154_addr *a, - const struct ieee802154_addr_sa *sa) +static inline int ieee802154_addr_from_sa(struct ieee802154_addr *a, + const struct ieee802154_addr_sa *sa, int len) { a->mode =3D sa->addr_type; a->pan_id =3D cpu_to_le16(sa->pan_id); @@ -176,9 +176,14 @@ static inline void ieee802154_addr_from_sa(struct ieee= 802154_addr *a, a->short_addr =3D cpu_to_le16(sa->short_addr); break; case IEEE802154_ADDR_LONG: + if (len > sizeof(struct sockaddr_ieee802154)) + return -EINVAL; a->extended_addr =3D ieee802154_devaddr_from_raw(sa->hwaddr); break; + default: + return -EINVAL; } + return 0; } =20 static inline void ieee802154_addr_to_sa(struct ieee802154_addr_sa *sa, diff --git a/net/ieee802154/socket.c b/net/ieee802154/socket.c index 718fb77bb..4452aaf68 100644 --- a/net/ieee802154/socket.c +++ b/net/ieee802154/socket.c @@ -27,6 +27,10 @@ #include #include =20 +#define IEEE802154_MIN_NAMELEN \ + (offsetof(struct sockaddr_ieee802154, addr) + \ + offsetofend(struct ieee802154_addr_sa, short_addr)) + /* Utility function for families */ static struct net_device* ieee802154_get_dev(struct net *net, const struct ieee802154_addr *addr) @@ -200,7 +204,7 @@ static int raw_bind(struct sock *sk, struct sockaddr *_= uaddr, int len) int err =3D 0; struct net_device *dev =3D NULL; =20 - if (len < sizeof(*uaddr)) + if (len < IEEE802154_MIN_NAMELEN) return -EINVAL; =20 uaddr =3D (struct sockaddr_ieee802154 *)_uaddr; @@ -209,7 +213,9 @@ static int raw_bind(struct sock *sk, struct sockaddr *_= uaddr, int len) =20 lock_sock(sk); =20 - ieee802154_addr_from_sa(&addr, &uaddr->addr); + err =3D ieee802154_addr_from_sa(&addr, &uaddr->addr, len); + if (err < 0) + goto out; dev =3D ieee802154_get_dev(sock_net(sk), &addr); if (!dev) { err =3D -ENODEV; @@ -493,13 +499,15 @@ static int dgram_bind(struct sock *sk, struct sockadd= r *uaddr, int len) =20 ro->bound =3D 0; =20 - if (len < sizeof(*addr)) + if (len < IEEE802154_MIN_NAMELEN) goto out; =20 if (addr->family !=3D AF_IEEE802154) goto out; =20 - ieee802154_addr_from_sa(&haddr, &addr->addr); + err =3D ieee802154_addr_from_sa(&haddr, &addr->addr, len); + if (err < 0) + goto out; dev =3D ieee802154_get_dev(sock_net(sk), &haddr); if (!dev) { err =3D -ENODEV; @@ -564,7 +572,7 @@ static int dgram_connect(struct sock *sk, struct sockad= dr *uaddr, struct dgram_sock *ro =3D dgram_sk(sk); int err =3D 0; =20 - if (len < sizeof(*addr)) + if (len < IEEE802154_MIN_NAMELEN) return -EINVAL; =20 if (addr->family !=3D AF_IEEE802154) @@ -577,7 +585,9 @@ static int dgram_connect(struct sock *sk, struct sockad= dr *uaddr, goto out; } =20 - ieee802154_addr_from_sa(&ro->dst_addr, &addr->addr); + err =3D ieee802154_addr_from_sa(&ro->dst_addr, &addr->addr, len); + if (err < 0) + goto out; ro->connected =3D 1; =20 out: @@ -612,10 +622,22 @@ static int dgram_sendmsg(struct sock *sk, struct msgh= dr *msg, size_t size) return -EOPNOTSUPP; } =20 - if (!ro->connected && !msg->msg_name) - return -EDESTADDRREQ; - else if (ro->connected && msg->msg_name) - return -EISCONN; + if (msg->msg_name) { + if (ro->connected) + return -EISCONN; + if (msg->msg_namelen < IEEE802154_MIN_NAMELEN) + return -EINVAL; + DECLARE_SOCKADDR(struct sockaddr_ieee802154*, + daddr, msg->msg_name); + err =3D ieee802154_addr_from_sa(&dst_addr, &daddr->addr, + msg->msg_namelen); + if (err < 0) + return err; + } else { + if (!ro->connected) + return -EDESTADDRREQ; + dst_addr =3D ro->dst_addr; + } =20 if (!ro->bound) dev =3D dev_getfirstbyhwtype(sock_net(sk), ARPHRD_IEEE802154); @@ -651,16 +673,6 @@ static int dgram_sendmsg(struct sock *sk, struct msghd= r *msg, size_t size) cb =3D mac_cb_init(skb); cb->type =3D IEEE802154_FC_TYPE_DATA; cb->ackreq =3D ro->want_ack; - - if (msg->msg_name) { - DECLARE_SOCKADDR(struct sockaddr_ieee802154*, - daddr, msg->msg_name); - - ieee802154_addr_from_sa(&dst_addr, &daddr->addr); - } else { - dst_addr =3D ro->dst_addr; - } - cb->secen =3D ro->secen; cb->secen_override =3D ro->secen_override; cb->seclevel =3D ro->seclevel; --=20 2.27.0