From patchwork Fri Oct 25 05:40:20 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Antipov X-Patchwork-Id: 838764 Received: from forward205b.mail.yandex.net (forward205b.mail.yandex.net [178.154.239.152]) (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 CE4B3433CE for ; Fri, 25 Oct 2024 05:46:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=178.154.239.152 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729835182; cv=none; b=KCJHBEWCYk6WHQSac0/SyDteYbycwTaQBmvSvzZHaZPdrE5LIJVpZanz2wzuQ/IMMskwJDE3rPa9B2oIkSgTUZUTsVZMjvTWo5hNRz8Td5wwx+tlfQy+uS8IXTKAQwRcTe85G7Ud94JNxSkipEPuMPh8bNvDMS2x3iPbOonIaos= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729835182; c=relaxed/simple; bh=KGBi/3N22zXOpf+f37ooWSaqrhiCoM5X+Si7xLNwVAo=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=Wo7ScNCo5zYWd23jjJWZxdUyOFB5FOvlEOHnXRjtiJxOfeh6hc46Lbxr5+w7sLqUumgJZxFdumCha3pMcEcXu2moPqpHi7eUIoXWut0mllzIELSsgsLj5cPDd3EslEEG1Q2kTLJS7IRd9Bk2B6k9lFai5NLZdN/nghLwGAC3zFs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=yandex.ru; spf=pass smtp.mailfrom=yandex.ru; dkim=pass (1024-bit key) header.d=yandex.ru header.i=@yandex.ru header.b=MKWW9tjL; arc=none smtp.client-ip=178.154.239.152 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=yandex.ru Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=yandex.ru Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=yandex.ru header.i=@yandex.ru header.b="MKWW9tjL" Received: from forward100b.mail.yandex.net (forward100b.mail.yandex.net [IPv6:2a02:6b8:c02:900:1:45:d181:d100]) by forward205b.mail.yandex.net (Yandex) with ESMTPS id C93C065567 for ; Fri, 25 Oct 2024 08:40:35 +0300 (MSK) Received: from mail-nwsmtp-smtp-production-main-29.myt.yp-c.yandex.net (mail-nwsmtp-smtp-production-main-29.myt.yp-c.yandex.net [IPv6:2a02:6b8:c12:201e:0:640:6eff:0]) by forward100b.mail.yandex.net (Yandex) with ESMTPS id AEDE260ACA; Fri, 25 Oct 2024 08:40:27 +0300 (MSK) Received: by mail-nwsmtp-smtp-production-main-29.myt.yp-c.yandex.net (smtp/Yandex) with ESMTPSA id NeN4Iw4gBW20-wc8alyQz; Fri, 25 Oct 2024 08:40:26 +0300 X-Yandex-Fwd: 1 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yandex.ru; s=mail; t=1729834826; bh=6A79k2A/zcb72RqIvFJcx9WrxngNVHD4mD/XMa5TPuI=; h=Message-ID:Date:Cc:Subject:To:From; b=MKWW9tjLgi7LOt3Pdmu4QtTpZO4lDj5eNZQBUag5liwWH1PE21yma2TyRucLqQp1s 8V5oESJ4+TjL/oiAmIF5hKWy4NqqFI81nqhxDsUTKUFaZCuXs3F/IjDrF8qyFcCtP1 Y+zhYacmSuXV4NRG0PbT6XhFdU3gX6TrUjNbxrAE= Authentication-Results: mail-nwsmtp-smtp-production-main-29.myt.yp-c.yandex.net; dkim=pass header.i=@yandex.ru From: Dmitry Antipov To: =?utf-8?q?Toke_H=C3=B8iland-J=C3=B8rgensen?= Cc: Kalle Valo , linux-wireless@vger.kernel.org, lvc-project@linuxtesting.org, Dmitry Antipov , syzbot+93cbd5fbb85814306ba1@syzkaller.appspotmail.com Subject: [PATCH v2] wifi: ath9k: fix out-of-bounds endpoint index in htc_issue_send() Date: Fri, 25 Oct 2024 08:40:20 +0300 Message-ID: <20241025054020.207044-1-dmantipov@yandex.ru> X-Mailer: git-send-email 2.47.0 Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Syzbot has reported the following UBSAN splat: UBSAN: array-index-out-of-bounds in drivers/net/wireless/ath/ath9k/htc_hst.c:26:35 index 255 is out of range for type 'struct htc_endpoint[22]' ... Call Trace: ... __ubsan_handle_out_of_bounds+0x115/0x140 htc_send_epid+0x1e0/0x2d0 ath9k_wmi_cmd+0x31f/0x590 ath9k_regread+0xdc/0x140 ? __pfx_ath9k_regread+0x10/0x10 ? _raw_spin_unlock_irqrestore+0xae/0x110 ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 ? __pfx_ath9k_regread+0x10/0x10 ath9k_hw_init+0x4b0/0x2230 ? init_timer_key+0x171/0x2d0 ath9k_htc_probe_device+0xa66/0x1fe0 ? __pfx_ath9k_htc_probe_device+0x10/0x10 ? usb_hcd_submit_urb+0x345/0x1ae0 ? usb_free_urb+0x9d/0x120 ? ath9k_hif_usb_alloc_urbs+0x1077/0x1150 ath9k_htc_hw_init+0x32/0x70 ath9k_hif_usb_firmware_cb+0x240/0x4c0 ? __pfx_ath9k_hif_usb_firmware_cb+0x10/0x10 request_firmware_work_func+0x106/0x1c0 ... IIUC https://syzkaller.appspot.com/text?tag=ReproC&x=1734b9f1180000 makes an attempt to emulate ath9k USB device in somewhat weird and obscure way so I'm not sure whether this may happen on a real hardware. OTOH whether ending with ENDPOINT_UNUSED in 'htc_connect_service()' may indicate the malfunctioned real device, it may be better to reject such a device with -ENODEV. Reported-by: syzbot+93cbd5fbb85814306ba1@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=93cbd5fbb85814306ba1 Fixes: fb9987d0f748 ("ath9k_htc: Support for AR9271 chipset.") Signed-off-by: Dmitry Antipov --- v2: avoid conditional expression (Kalle) and return -ENODEV without touching *conn_rsp_epid (Toke) --- drivers/net/wireless/ath/ath9k/htc_hst.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/wireless/ath/ath9k/htc_hst.c b/drivers/net/wireless/ath/ath9k/htc_hst.c index eb631fd3336d..a5bc0a5dfe7c 100644 --- a/drivers/net/wireless/ath/ath9k/htc_hst.c +++ b/drivers/net/wireless/ath/ath9k/htc_hst.c @@ -294,6 +294,9 @@ int htc_connect_service(struct htc_target *target, return -ETIMEDOUT; } + if (unlikely(target->conn_rsp_epid == ENDPOINT_UNUSED)) + return -ENODEV; + *conn_rsp_epid = target->conn_rsp_epid; return 0; err: