From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7C19182D86; Mon, 15 Apr 2024 14:34:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713191682; cv=none; b=csJFYYlwy1Z7dSJHJi4texoYt25UbCkplomv081GeJxmet9V9o8wTT7IFanihzsdh562goKs7e7vlxyNnqYR/4k9Ve6I2lpg8TCfoQu9v45Epgg1a7hutsejLoGohhAMNx54BB8VzSHdL9J/kfFcnuXnUgrJCEL2kfxJ567L3Wg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713191682; c=relaxed/simple; bh=UBgVwf1eJSbrPykllpN2W4Rp7OEpgdNqxI3WQ2QWz/s=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=r1kgcZ0sLBz6xDOTV2PlEKaYib82LQIJD8470Db18hr9JdF5cziznO8x1GJnmK89+Z2LNPaPVIv2UR4oTYlp4FVeiQgzXTl299GACQxA6ZbbpW0rMGMJQwUUV7MKVjlSnwKuiF1IaDHk5zFyYRzncLqB0+IDKt4IDp0PRJMR3qs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=PewHqzYC; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="PewHqzYC" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 87599C113CC; Mon, 15 Apr 2024 14:34:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1713191681; bh=UBgVwf1eJSbrPykllpN2W4Rp7OEpgdNqxI3WQ2QWz/s=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PewHqzYCphpA0QVDk9v8DdtgIIuMTq/mE3oxMx0pX5OVGXDiTdvjjNQR4wgmEtvhl acNz9gfa6DmzFhputKBCK4s7Y/xqK+w762VJHHGeGmBXbTLE4OPeCcAzb6xUIqM1jY nOWIEvPKlLScR0OmGCua4knvuik86w8qeug4BBaQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, syzbot , Eric Dumazet , Luiz Augusto von Dentz , Sasha Levin Subject: [PATCH 6.6 052/122] Bluetooth: SCO: Fix not validating setsockopt user input Date: Mon, 15 Apr 2024 16:20:17 +0200 Message-ID: <20240415141954.931900709@linuxfoundation.org> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240415141953.365222063@linuxfoundation.org> References: <20240415141953.365222063@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ 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 for 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 --- include/net/bluetooth/bluetooth.h | 9 +++++++++ net/bluetooth/sco.c | 23 ++++++++++------------- 2 files changed, 19 insertions(+), 13 deletions(-) diff --git a/include/net/bluetooth/bluetooth.h b/include/net/bluetooth/bluetooth.h index 28e32c9a6cc99..e4a6831133f81 100644 --- a/include/net/bluetooth/bluetooth.h +++ b/include/net/bluetooth/bluetooth.h @@ -585,6 +585,15 @@ static inline struct sk_buff *bt_skb_sendmmsg(struct sock *sk, return skb; } +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); __u8 bt_status(int err); diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c index c736186aba26b..8e4f39b8601cb 100644 --- a/net/bluetooth/sco.c +++ b/net/bluetooth/sco.c @@ -823,7 +823,7 @@ static int sco_sock_setsockopt(struct socket *sock, int level, int optname, sockptr_t optval, unsigned int optlen) { struct sock *sk = sock->sk; - int len, err = 0; + int err = 0; struct bt_voice voice; u32 opt; struct bt_codecs *codecs; @@ -842,10 +842,9 @@ static int sco_sock_setsockopt(struct socket *sock, int level, int optname, break; } - if (copy_from_sockptr(&opt, optval, sizeof(u32))) { - err = -EFAULT; + err = bt_copy_from_sockptr(&opt, sizeof(opt), optval, optlen); + if (err) break; - } if (opt) set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); @@ -862,11 +861,10 @@ static int sco_sock_setsockopt(struct socket *sock, int level, int optname, voice.setting = sco_pi(sk)->setting; - len = min_t(unsigned int, sizeof(voice), optlen); - if (copy_from_sockptr(&voice, optval, len)) { - err = -EFAULT; + err = bt_copy_from_sockptr(&voice, sizeof(voice), optval, + optlen); + if (err) break; - } /* Explicitly check for these values */ if (voice.setting != BT_VOICE_TRANSPARENT && @@ -889,10 +887,9 @@ static int sco_sock_setsockopt(struct socket *sock, int level, int optname, break; case BT_PKT_STATUS: - if (copy_from_sockptr(&opt, optval, sizeof(u32))) { - err = -EFAULT; + err = bt_copy_from_sockptr(&opt, sizeof(opt), optval, optlen); + if (err) break; - } if (opt) set_bit(BT_SK_PKT_STATUS, &bt_sk(sk)->flags); @@ -933,9 +930,9 @@ static int sco_sock_setsockopt(struct socket *sock, int level, int optname, break; } - if (copy_from_sockptr(buffer, optval, optlen)) { + err = bt_copy_from_sockptr(buffer, optlen, optval, optlen); + if (err) { hci_dev_put(hdev); - err = -EFAULT; break; } -- 2.43.0