From patchwork Sun Apr 7 13:11:09 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nikita Zhandarovich X-Patchwork-Id: 787162 Received: from exchange.fintech.ru (exchange.fintech.ru [195.54.195.159]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7E00E3FB16; Sun, 7 Apr 2024 13:11:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=195.54.195.159 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712495480; cv=none; b=UVQSnaSwVLG1mdHRSS9hWiYoCOe30uJlOq75MgMPAvWA9V20qn541DjnXboWkG8W1DOypYsKt9Si+X0m2rc+wV2oS8aWQel2FIEPguUupLJi00CE3/x9vEUYlgiSA/nEWFV0CI5ON/JPbBiOC7Y0BK21JWpNLU/HN0K1CPhoZNE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712495480; c=relaxed/simple; bh=tOK8citKj5coWWGdrUGQDHZ0rmgq5F1rm/dGHe8XHdE=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=GAEiu0dofjln8s6oh1SwnMIyjT0mNE5sv7Pj0FoGK8rAxZnXAJWzqQD5adR2ZVwWmONDK3p13Z2z/tf7w28xshDP2B+3RsSqmMK9Vxvo5XL0NF+zgFzh6rFG1AqAe/Ytl8DbRhD96hcd6Ts5QViRXFOANCa4RH0kwHdnVfG6AbA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=fintech.ru; spf=pass smtp.mailfrom=fintech.ru; arc=none smtp.client-ip=195.54.195.159 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=fintech.ru Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=fintech.ru Received: from Ex16-01.fintech.ru (10.0.10.18) by exchange.fintech.ru (195.54.195.159) with Microsoft SMTP Server (TLS) id 14.3.498.0; Sun, 7 Apr 2024 16:11:15 +0300 Received: from localhost (10.0.253.138) by Ex16-01.fintech.ru (10.0.10.18) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2242.4; Sun, 7 Apr 2024 16:11:15 +0300 From: Nikita Zhandarovich To: Christian Lamparter , Kalle Valo CC: Nikita Zhandarovich , , , , , Subject: [PATCH] wifi: carl9170: add a proper sanity check for endpoints Date: Sun, 7 Apr 2024 06:11:09 -0700 Message-ID: <20240407131109.26212-1-n.zhandarovich@fintech.ru> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: Ex16-02.fintech.ru (10.0.10.19) To Ex16-01.fintech.ru (10.0.10.18) Syzkaller reports [1] hitting a warning which is caused by presence of a wrong endpoint type at the URB sumbitting stage. While there was a check for a specific 4th endpoint, since it can switch types between bulk and interrupt, other endpoints are trusted implicitly. Similar warning is triggered in a couple of other syzbot issues [2]. Fix the issue by doing a comprehensive check of all endpoints taking into account difference between high- and full-speed configuration. This patch has not been tested on real hardware. [1] Syzkaller report: ... WARNING: CPU: 0 PID: 4721 at drivers/usb/core/urb.c:504 usb_submit_urb+0xed6/0x1880 drivers/usb/core/urb.c:504 ... Call Trace: carl9170_usb_send_rx_irq_urb+0x273/0x340 drivers/net/wireless/ath/carl9170/usb.c:504 carl9170_usb_init_device drivers/net/wireless/ath/carl9170/usb.c:939 [inline] carl9170_usb_firmware_finish drivers/net/wireless/ath/carl9170/usb.c:999 [inline] carl9170_usb_firmware_step2+0x175/0x240 drivers/net/wireless/ath/carl9170/usb.c:1028 request_firmware_work_func+0x130/0x240 drivers/base/firmware_loader/main.c:1107 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289 worker_thread+0x669/0x1090 kernel/workqueue.c:2436 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 [2] Related syzkaller crashes: Link: https://syzkaller.appspot.com/bug?extid=e394db78ae0b0032cb4d Link: https://syzkaller.appspot.com/bug?extid=9468df99cb63a4a4c4e1 Reported-and-tested-by: syzbot+0ae4804973be759fa420@syzkaller.appspotmail.com Fixes: a84fab3cbfdc ("carl9170: 802.11 rx/tx processing and usb backend") Signed-off-by: Nikita Zhandarovich --- P.S. as AR9170_USB_EP_CMD endpoint can switch between bulk and int, I failed to find a prettier solution to this problem. Will be glad to hear if there is a better option... drivers/net/wireless/ath/carl9170/usb.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/drivers/net/wireless/ath/carl9170/usb.c b/drivers/net/wireless/ath/carl9170/usb.c index c4edf8355941..66d2ad561fd3 100644 --- a/drivers/net/wireless/ath/carl9170/usb.c +++ b/drivers/net/wireless/ath/carl9170/usb.c @@ -1069,6 +1069,33 @@ static int carl9170_usb_probe(struct usb_interface *intf, ar->usb_ep_cmd_is_bulk = true; } + /* Verify that all expected endpoints are present */ + if (ar->usb_ep_cmd_is_bulk) { + u8 bulk_ep_addr[] = { + AR9170_USB_EP_RX | USB_DIR_IN, + AR9170_USB_EP_TX | USB_DIR_OUT, + AR9170_USB_EP_CMD | USB_DIR_OUT, + 0}; + u8 int_ep_addr[] = { + AR9170_USB_EP_IRQ | USB_DIR_IN, + 0}; + if (!usb_check_bulk_endpoints(intf, bulk_ep_addr) || + !usb_check_int_endpoints(intf, int_ep_addr)) + return -ENODEV; + } else { + u8 bulk_ep_addr[] = { + AR9170_USB_EP_RX | USB_DIR_IN, + AR9170_USB_EP_TX | USB_DIR_OUT, + 0}; + u8 int_ep_addr[] = { + AR9170_USB_EP_IRQ | USB_DIR_IN, + AR9170_USB_EP_CMD | USB_DIR_OUT, + 0}; + if (!usb_check_bulk_endpoints(intf, bulk_ep_addr) || + !usb_check_int_endpoints(intf, int_ep_addr)) + return -ENODEV; + } + usb_set_intfdata(intf, ar); SET_IEEE80211_DEV(ar->hw, &intf->dev);