From patchwork Sat May 13 21:41:46 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fedor Pchelkin X-Patchwork-Id: 681779 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 88924C77B7D for ; Sat, 13 May 2023 21:42:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229688AbjEMVmH (ORCPT ); Sat, 13 May 2023 17:42:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53884 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229473AbjEMVmG (ORCPT ); Sat, 13 May 2023 17:42:06 -0400 Received: from mail.ispras.ru (mail.ispras.ru [83.149.199.84]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 807482720; Sat, 13 May 2023 14:42:05 -0700 (PDT) Received: from fpc.intra.ispras.ru (unknown [10.10.165.8]) by mail.ispras.ru (Postfix) with ESMTPSA id 9E12E44C1012; Sat, 13 May 2023 21:42:03 +0000 (UTC) DKIM-Filter: OpenDKIM Filter v2.11.0 mail.ispras.ru 9E12E44C1012 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ispras.ru; s=default; t=1684014123; bh=6rJLFQzTqQuln9eGYgx3BvQDSlEIAh0h1G71nSAdqhM=; h=From:To:Cc:Subject:Date:From; b=k9KSWGlIEpOYLlMwhxUF82/VVZlhZ+BvdDYsi8ZAyB9O8IUdFKawCuVsHX/evAMBT shuB4nuBRMXGU4o11FN4sppoCgMcDfm7mt553lgz2Ep0Ek6rmJnVczZtPAvQw4WcSl 2xp01YsVkoD7ZL6Fb+bkxHewqHBpoNKoPW9Mg9c4= From: Fedor Pchelkin To: Kalle Valo Cc: Fedor Pchelkin , =?utf-8?q?Toke_H=C3=B8iland-J=C3=B8?= =?utf-8?q?rgensen?= , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Takeshi Misawa , Alexey Khoroshilov , lvc-project@linuxtesting.org, syzbot+b68fbebe56d8362907e8@syzkaller.appspotmail.com Subject: [PATCH] wifi: ath9k: don't allow to overwrite ENDPOINT0 attributes Date: Sun, 14 May 2023 00:41:46 +0300 Message-Id: <20230513214146.120963-1-pchelkin@ispras.ru> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org A bad USB device is able to construct a service connection response message with target endpoint being ENDPOINT0 which is reserved for HTC_CTRL_RSVD_SVC and should not be modified to be used for any other services. Reject such service connection responses. Found by Linux Verification Center (linuxtesting.org) with Syzkaller. Fixes: fb9987d0f748 ("ath9k_htc: Support for AR9271 chipset.") Reported-by: syzbot+b68fbebe56d8362907e8@syzkaller.appspotmail.com Signed-off-by: Fedor Pchelkin --- drivers/net/wireless/ath/ath9k/htc_hst.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/ath/ath9k/htc_hst.c b/drivers/net/wireless/ath/ath9k/htc_hst.c index fe62ff668f75..a15d8d80df87 100644 --- a/drivers/net/wireless/ath/ath9k/htc_hst.c +++ b/drivers/net/wireless/ath/ath9k/htc_hst.c @@ -114,7 +114,7 @@ static void htc_process_conn_rsp(struct htc_target *target, if (svc_rspmsg->status == HTC_SERVICE_SUCCESS) { epid = svc_rspmsg->endpoint_id; - if (epid < 0 || epid >= ENDPOINT_MAX) + if (epid <= 0 || epid >= ENDPOINT_MAX) return; service_id = be16_to_cpu(svc_rspmsg->service_id);