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 244592222AE; Thu, 13 Feb 2025 14:39:53 +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=1739457594; cv=none; b=KlpQ+188YwUnOPkp7JU2DHQIc16SX1qlahdqPU3GoGFHIpdbQTtx7dFr7/o0rxLl5dqPyarCiFrkFe03QryS3Lf68rnilU/23vOo3Kp02fccH3297vjEcARV68vLivtWwkXZhcIUo21LIMOLIu3qnHja/pBnPpmkalIhw9xKMTU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739457594; c=relaxed/simple; bh=GFD/oKX1HFEw1X+pbEYYXjUomulJ0xy6keX8cfyOcns=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=BCcOh7wMSzIPk4lQZiqZqufWUyQKgMtfQT0irqmZW+BGNLwbV47e0g3dosJtPKQ7ZXOvFkjC4QJ3oYEEQOMCPzBpAdqIvad6GNtrb4QFKzOouj1zTgeZgylHWpwC+W8djabMIWyxRIgmC/FI2/NLo4MFdjVBJZEml4yXbZRiVck= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=cgnca/ir; 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="cgnca/ir" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 28FB2C4CED1; Thu, 13 Feb 2025 14:39:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1739457593; bh=GFD/oKX1HFEw1X+pbEYYXjUomulJ0xy6keX8cfyOcns=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=cgnca/ir/r+3z8BHZxx97hxnt0XKs6joDeZM14csA4HX51FuE3ZRTyOndkFOjKTSn siwflGjNj/xbBDoGfZyrrpGgtTXZ8WzJEJzuvcQkJoKjGp2sNOT4jo8BOHQRXFXcmN dH9IszgW8Rp56bEe3ceKTW18RDE6XjhChCp8vtsY= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Dan Carpenter , Namjae Jeon , Steve French Subject: [PATCH 6.12 155/422] ksmbd: fix integer overflows on 32 bit systems Date: Thu, 13 Feb 2025 15:25:04 +0100 Message-ID: <20250213142442.527689913@linuxfoundation.org> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250213142436.408121546@linuxfoundation.org> References: <20250213142436.408121546@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Dan Carpenter commit aab98e2dbd648510f8f51b83fbf4721206ccae45 upstream. On 32bit systems the addition operations in ipc_msg_alloc() can potentially overflow leading to memory corruption. Add bounds checking using KSMBD_IPC_MAX_PAYLOAD to avoid overflow. Fixes: 0626e6641f6b ("cifsd: add server handler for central processing and tranport layers") Cc: stable@vger.kernel.org Signed-off-by: Dan Carpenter Signed-off-by: Namjae Jeon Signed-off-by: Steve French Signed-off-by: Greg Kroah-Hartman --- fs/smb/server/transport_ipc.c | 9 +++++++++ 1 file changed, 9 insertions(+) --- a/fs/smb/server/transport_ipc.c +++ b/fs/smb/server/transport_ipc.c @@ -626,6 +626,9 @@ ksmbd_ipc_spnego_authen_request(const ch struct ksmbd_spnego_authen_request *req; struct ksmbd_spnego_authen_response *resp; + if (blob_len > KSMBD_IPC_MAX_PAYLOAD) + return NULL; + msg = ipc_msg_alloc(sizeof(struct ksmbd_spnego_authen_request) + blob_len + 1); if (!msg) @@ -805,6 +808,9 @@ struct ksmbd_rpc_command *ksmbd_rpc_writ struct ksmbd_rpc_command *req; struct ksmbd_rpc_command *resp; + if (payload_sz > KSMBD_IPC_MAX_PAYLOAD) + return NULL; + msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command) + payload_sz + 1); if (!msg) return NULL; @@ -853,6 +859,9 @@ struct ksmbd_rpc_command *ksmbd_rpc_ioct struct ksmbd_rpc_command *req; struct ksmbd_rpc_command *resp; + if (payload_sz > KSMBD_IPC_MAX_PAYLOAD) + return NULL; + msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command) + payload_sz + 1); if (!msg) return NULL;