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([192.19.161.250]) by smtp.gmail.com with ESMTPSA id 5614622812f47-3f1f09810f7sm270795b6e.37.2025.01.23.21.33.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 23 Jan 2025 21:33:18 -0800 (PST) From: Keerthana K To: stable@vger.kernel.org, gregkh@linuxfoundation.org Cc: marcel@holtmann.org, johan.hedberg@gmail.com, luiz.dentz@gmail.com, davem@davemloft.net, kuba@kernel.org, linux-bluetooth@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, ajay.kaher@broadcom.com, alexey.makhalov@broadcom.com, vasavi.sirnapalli@broadcom.com, Luiz Augusto von Dentz , syzbot , Eric Dumazet , Sasha Levin , Keerthana K Subject: [PATCH v2 v5.15.y 1/2] Bluetooth: SCO: Fix not validating setsockopt user input Date: Fri, 24 Jan 2025 05:33:05 +0000 Message-Id: <20250124053306.5028-2-keerthana.kalyanasundaram@broadcom.com> X-Mailer: git-send-email 2.39.4 In-Reply-To: <20250124053306.5028-1-keerthana.kalyanasundaram@broadcom.com> References: <20250124053306.5028-1-keerthana.kalyanasundaram@broadcom.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Luiz Augusto von Dentz [ Upstream commit 51eda36d33e43201e7a4fd35232e069b2c850b01 ] syzbot reported sco_sock_setsockopt() is copying data without checking user input length. BUG: KASAN: slab-out-of-bounds in copy_from_sockptr_offset include/linux/sockptr.h:49 [inline] BUG: KASAN: slab-out-of-bounds in copy_from_sockptr include/linux/sockptr.h:55 [inline] BUG: KASAN: slab-out-of-bounds in sco_sock_setsockopt+0xc0b/0xf90 net/bluetooth/sco.c:893 Read of size 4 at addr ffff88805f7b15a3 by task syz-executor.5/12578 Fixes: ad10b1a48754 ("Bluetooth: Add Bluetooth socket voice option") Fixes: b96e9c671b05 ("Bluetooth: Add BT_DEFER_SETUP option to sco socket") Fixes: 00398e1d5183 ("Bluetooth: Add support for BT_PKT_STATUS CMSG data fo= r SCO connections") Fixes: f6873401a608 ("Bluetooth: Allow setting of codec for HFP offload use= case") Reported-by: syzbot Signed-off-by: Eric Dumazet Signed-off-by: Luiz Augusto von Dentz Signed-off-by: Sasha Levin Signed-off-by: Keerthana K --- include/net/bluetooth/bluetooth.h | 9 +++++++++ net/bluetooth/sco.c | 19 ++++++++----------- 2 files changed, 17 insertions(+), 11 deletions(-) diff --git a/include/net/bluetooth/bluetooth.h b/include/net/bluetooth/blue= tooth.h index 9125effbf448..49926a4aa16c 100644 --- a/include/net/bluetooth/bluetooth.h +++ b/include/net/bluetooth/bluetooth.h @@ -420,6 +420,15 @@ static inline struct sk_buff *bt_skb_send_alloc(struct= sock *sk, return NULL; } =20 +static inline int bt_copy_from_sockptr(void *dst, size_t dst_size, + sockptr_t src, size_t src_size) +{ + if (dst_size > src_size) + return -EINVAL; + + return copy_from_sockptr(dst, src, dst_size); +} + int bt_to_errno(u16 code); =20 void hci_sock_set_flag(struct sock *sk, int nr); diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c index 98a881586512..b1a905b195fe 100644 --- a/net/bluetooth/sco.c +++ b/net/bluetooth/sco.c @@ -822,7 +822,7 @@ static int sco_sock_setsockopt(struct socket *sock, int= level, int optname, sockptr_t optval, unsigned int optlen) { struct sock *sk =3D sock->sk; - int len, err =3D 0; + int err =3D 0; struct bt_voice voice; u32 opt; =20 @@ -838,10 +838,9 @@ static int sco_sock_setsockopt(struct socket *sock, in= t level, int optname, break; } =20 - if (copy_from_sockptr(&opt, optval, sizeof(u32))) { - err =3D -EFAULT; + err =3D bt_copy_from_sockptr(&opt, sizeof(opt), optval, optlen); + if (err) break; - } =20 if (opt) set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); @@ -858,11 +857,10 @@ static int sco_sock_setsockopt(struct socket *sock, i= nt level, int optname, =20 voice.setting =3D sco_pi(sk)->setting; =20 - len =3D min_t(unsigned int, sizeof(voice), optlen); - if (copy_from_sockptr(&voice, optval, len)) { - err =3D -EFAULT; + err =3D bt_copy_from_sockptr(&voice, sizeof(voice), optval, + optlen); + if (err) break; - } =20 /* Explicitly check for these values */ if (voice.setting !=3D BT_VOICE_TRANSPARENT && @@ -875,10 +873,9 @@ static int sco_sock_setsockopt(struct socket *sock, in= t level, int optname, break; =20 case BT_PKT_STATUS: - if (copy_from_sockptr(&opt, optval, sizeof(u32))) { - err =3D -EFAULT; + err =3D bt_copy_from_sockptr(&opt, sizeof(opt), optval, optlen); + if (err) break; - } =20 if (opt) sco_pi(sk)->cmsg_mask |=3D SCO_CMSG_PKT_STATUS; --=20 2.39.4 From nobody Thu Jan 30 17:28:51 2025 Received: from mail-ot1-f50.google.com (mail-ot1-f50.google.com [209.85.210.50]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9EA1B1DAC8C for ; 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([192.19.161.250]) by smtp.gmail.com with ESMTPSA id 5614622812f47-3f1f09810f7sm270795b6e.37.2025.01.23.21.33.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 23 Jan 2025 21:33:23 -0800 (PST) From: Keerthana K To: stable@vger.kernel.org, gregkh@linuxfoundation.org Cc: marcel@holtmann.org, johan.hedberg@gmail.com, luiz.dentz@gmail.com, davem@davemloft.net, kuba@kernel.org, linux-bluetooth@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, ajay.kaher@broadcom.com, alexey.makhalov@broadcom.com, vasavi.sirnapalli@broadcom.com, Luiz Augusto von Dentz , syzbot , Eric Dumazet , Sasha Levin , Keerthana K Subject: [PATCH v2 v5.15.y 2/2] Bluetooth: RFCOMM: Fix not validating setsockopt user input Date: Fri, 24 Jan 2025 05:33:06 +0000 Message-Id: <20250124053306.5028-3-keerthana.kalyanasundaram@broadcom.com> X-Mailer: git-send-email 2.39.4 In-Reply-To: <20250124053306.5028-1-keerthana.kalyanasundaram@broadcom.com> References: <20250124053306.5028-1-keerthana.kalyanasundaram@broadcom.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Luiz Augusto von Dentz [ Upstream commit a97de7bff13b1cc825c1b1344eaed8d6c2d3e695 ] syzbot reported rfcomm_sock_setsockopt_old() is copying data without checking user input length. BUG: KASAN: slab-out-of-bounds in copy_from_sockptr_offset include/linux/sockptr.h:49 [inline] BUG: KASAN: slab-out-of-bounds in copy_from_sockptr include/linux/sockptr.h:55 [inline] BUG: KASAN: slab-out-of-bounds in rfcomm_sock_setsockopt_old net/bluetooth/rfcomm/sock.c:632 [inline] BUG: KASAN: slab-out-of-bounds in rfcomm_sock_setsockopt+0x893/0xa70 net/bluetooth/rfcomm/sock.c:673 Read of size 4 at addr ffff8880209a8bc3 by task syz-executor632/5064 Fixes: 9f2c8a03fbb3 ("Bluetooth: Replace RFCOMM link mode with security lev= el") Fixes: bb23c0ab8246 ("Bluetooth: Add support for deferring RFCOMM connectio= n setup") Reported-by: syzbot Signed-off-by: Eric Dumazet Signed-off-by: Luiz Augusto von Dentz Signed-off-by: Sasha Levin Signed-off-by: Keerthana K --- net/bluetooth/rfcomm/sock.c | 14 +++++--------- 1 file changed, 5 insertions(+), 9 deletions(-) diff --git a/net/bluetooth/rfcomm/sock.c b/net/bluetooth/rfcomm/sock.c index 2c95bb58f901..47e2fd38b2e3 100644 --- a/net/bluetooth/rfcomm/sock.c +++ b/net/bluetooth/rfcomm/sock.c @@ -657,7 +657,7 @@ static int rfcomm_sock_setsockopt_old(struct socket *so= ck, int optname, =20 switch (optname) { case RFCOMM_LM: - if (copy_from_sockptr(&opt, optval, sizeof(u32))) { + if (bt_copy_from_sockptr(&opt, sizeof(opt), optval, optlen)) { err =3D -EFAULT; break; } @@ -692,7 +692,6 @@ static int rfcomm_sock_setsockopt(struct socket *sock, = int level, int optname, struct sock *sk =3D sock->sk; struct bt_security sec; int err =3D 0; - size_t len; u32 opt; =20 BT_DBG("sk %p", sk); @@ -714,11 +713,9 @@ static int rfcomm_sock_setsockopt(struct socket *sock,= int level, int optname, =20 sec.level =3D BT_SECURITY_LOW; =20 - len =3D min_t(unsigned int, sizeof(sec), optlen); - if (copy_from_sockptr(&sec, optval, len)) { - err =3D -EFAULT; + err =3D bt_copy_from_sockptr(&sec, sizeof(sec), optval, optlen); + if (err) break; - } =20 if (sec.level > BT_SECURITY_HIGH) { err =3D -EINVAL; @@ -734,10 +731,9 @@ static int rfcomm_sock_setsockopt(struct socket *sock,= int level, int optname, break; } =20 - if (copy_from_sockptr(&opt, optval, sizeof(u32))) { - err =3D -EFAULT; + err =3D bt_copy_from_sockptr(&opt, sizeof(opt), optval, optlen); + if (err) break; - } =20 if (opt) set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); --=20 2.39.4