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 A8E5C4431 for ; Wed, 15 Mar 2023 12:34:00 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2D940C433EF; Wed, 15 Mar 2023 12:34:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1678883640; bh=05b9O+id9fdWxUMUqvGYbjFpl4C6EGrQ82+VpQIesVI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=o1hrOsfWpcJ9tYFa3hAMW1WJf8W1YbhhqcXWbNXkhNVwgTH3nyXjbskQ/pKoIbf0/ yhBA4oom4gUYeKJQ9LbpmJXkIdgxo8pfc1tP5KV+mBAqUdc2VSxmFUMbBj2xWVK0pb h+Yp11mJJbw5I3PoLAzKsHDXKbjJ71U7Yu22Bx9g= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Hangyu Hua , Jakub Kicinski , Sasha Levin Subject: [PATCH 6.1 074/143] net: tls: fix possible race condition between do_tls_getsockopt_conf() and do_tls_setsockopt_conf() Date: Wed, 15 Mar 2023 13:12:40 +0100 Message-Id: <20230315115742.798553090@linuxfoundation.org> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230315115740.429574234@linuxfoundation.org> References: <20230315115740.429574234@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Hangyu Hua [ Upstream commit 49c47cc21b5b7a3d8deb18fc57b0aa2ab1286962 ] ctx->crypto_send.info is not protected by lock_sock in do_tls_getsockopt_conf(). A race condition between do_tls_getsockopt_conf() and error paths of do_tls_setsockopt_conf() may lead to a use-after-free or null-deref. More discussion: https://lore.kernel.org/all/Y/ht6gQL+u6fj3dG@hog/ Fixes: 3c4d7559159b ("tls: kernel TLS support") Signed-off-by: Hangyu Hua Link: https://lore.kernel.org/r/20230228023344.9623-1-hbh25y@gmail.com Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- net/tls/tls_main.c | 23 +++++------------------ 1 file changed, 5 insertions(+), 18 deletions(-) diff --git a/net/tls/tls_main.c b/net/tls/tls_main.c index 3735cb00905df..b32c112984dd9 100644 --- a/net/tls/tls_main.c +++ b/net/tls/tls_main.c @@ -405,13 +405,11 @@ static int do_tls_getsockopt_conf(struct sock *sk, char __user *optval, rc = -EINVAL; goto out; } - lock_sock(sk); memcpy(crypto_info_aes_gcm_128->iv, cctx->iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE, TLS_CIPHER_AES_GCM_128_IV_SIZE); memcpy(crypto_info_aes_gcm_128->rec_seq, cctx->rec_seq, TLS_CIPHER_AES_GCM_128_REC_SEQ_SIZE); - release_sock(sk); if (copy_to_user(optval, crypto_info_aes_gcm_128, sizeof(*crypto_info_aes_gcm_128))) @@ -429,13 +427,11 @@ static int do_tls_getsockopt_conf(struct sock *sk, char __user *optval, rc = -EINVAL; goto out; } - lock_sock(sk); memcpy(crypto_info_aes_gcm_256->iv, cctx->iv + TLS_CIPHER_AES_GCM_256_SALT_SIZE, TLS_CIPHER_AES_GCM_256_IV_SIZE); memcpy(crypto_info_aes_gcm_256->rec_seq, cctx->rec_seq, TLS_CIPHER_AES_GCM_256_REC_SEQ_SIZE); - release_sock(sk); if (copy_to_user(optval, crypto_info_aes_gcm_256, sizeof(*crypto_info_aes_gcm_256))) @@ -451,13 +447,11 @@ static int do_tls_getsockopt_conf(struct sock *sk, char __user *optval, rc = -EINVAL; goto out; } - lock_sock(sk); memcpy(aes_ccm_128->iv, cctx->iv + TLS_CIPHER_AES_CCM_128_SALT_SIZE, TLS_CIPHER_AES_CCM_128_IV_SIZE); memcpy(aes_ccm_128->rec_seq, cctx->rec_seq, TLS_CIPHER_AES_CCM_128_REC_SEQ_SIZE); - release_sock(sk); if (copy_to_user(optval, aes_ccm_128, sizeof(*aes_ccm_128))) rc = -EFAULT; break; @@ -472,13 +466,11 @@ static int do_tls_getsockopt_conf(struct sock *sk, char __user *optval, rc = -EINVAL; goto out; } - lock_sock(sk); memcpy(chacha20_poly1305->iv, cctx->iv + TLS_CIPHER_CHACHA20_POLY1305_SALT_SIZE, TLS_CIPHER_CHACHA20_POLY1305_IV_SIZE); memcpy(chacha20_poly1305->rec_seq, cctx->rec_seq, TLS_CIPHER_CHACHA20_POLY1305_REC_SEQ_SIZE); - release_sock(sk); if (copy_to_user(optval, chacha20_poly1305, sizeof(*chacha20_poly1305))) rc = -EFAULT; @@ -493,13 +485,11 @@ static int do_tls_getsockopt_conf(struct sock *sk, char __user *optval, rc = -EINVAL; goto out; } - lock_sock(sk); memcpy(sm4_gcm_info->iv, cctx->iv + TLS_CIPHER_SM4_GCM_SALT_SIZE, TLS_CIPHER_SM4_GCM_IV_SIZE); memcpy(sm4_gcm_info->rec_seq, cctx->rec_seq, TLS_CIPHER_SM4_GCM_REC_SEQ_SIZE); - release_sock(sk); if (copy_to_user(optval, sm4_gcm_info, sizeof(*sm4_gcm_info))) rc = -EFAULT; break; @@ -513,13 +503,11 @@ static int do_tls_getsockopt_conf(struct sock *sk, char __user *optval, rc = -EINVAL; goto out; } - lock_sock(sk); memcpy(sm4_ccm_info->iv, cctx->iv + TLS_CIPHER_SM4_CCM_SALT_SIZE, TLS_CIPHER_SM4_CCM_IV_SIZE); memcpy(sm4_ccm_info->rec_seq, cctx->rec_seq, TLS_CIPHER_SM4_CCM_REC_SEQ_SIZE); - release_sock(sk); if (copy_to_user(optval, sm4_ccm_info, sizeof(*sm4_ccm_info))) rc = -EFAULT; break; @@ -535,13 +523,11 @@ static int do_tls_getsockopt_conf(struct sock *sk, char __user *optval, rc = -EINVAL; goto out; } - lock_sock(sk); memcpy(crypto_info_aria_gcm_128->iv, cctx->iv + TLS_CIPHER_ARIA_GCM_128_SALT_SIZE, TLS_CIPHER_ARIA_GCM_128_IV_SIZE); memcpy(crypto_info_aria_gcm_128->rec_seq, cctx->rec_seq, TLS_CIPHER_ARIA_GCM_128_REC_SEQ_SIZE); - release_sock(sk); if (copy_to_user(optval, crypto_info_aria_gcm_128, sizeof(*crypto_info_aria_gcm_128))) @@ -559,13 +545,11 @@ static int do_tls_getsockopt_conf(struct sock *sk, char __user *optval, rc = -EINVAL; goto out; } - lock_sock(sk); memcpy(crypto_info_aria_gcm_256->iv, cctx->iv + TLS_CIPHER_ARIA_GCM_256_SALT_SIZE, TLS_CIPHER_ARIA_GCM_256_IV_SIZE); memcpy(crypto_info_aria_gcm_256->rec_seq, cctx->rec_seq, TLS_CIPHER_ARIA_GCM_256_REC_SEQ_SIZE); - release_sock(sk); if (copy_to_user(optval, crypto_info_aria_gcm_256, sizeof(*crypto_info_aria_gcm_256))) @@ -614,11 +598,9 @@ static int do_tls_getsockopt_no_pad(struct sock *sk, char __user *optval, if (len < sizeof(value)) return -EINVAL; - lock_sock(sk); value = -EINVAL; if (ctx->rx_conf == TLS_SW || ctx->rx_conf == TLS_HW) value = ctx->rx_no_pad; - release_sock(sk); if (value < 0) return value; @@ -635,6 +617,8 @@ static int do_tls_getsockopt(struct sock *sk, int optname, { int rc = 0; + lock_sock(sk); + switch (optname) { case TLS_TX: case TLS_RX: @@ -651,6 +635,9 @@ static int do_tls_getsockopt(struct sock *sk, int optname, rc = -ENOPROTOOPT; break; } + + release_sock(sk); + return rc; } -- 2.39.2