From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=95.215.58.241 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794206515; b=Qad+t7XXOjSPwea+Iawr/lEmNspmbkIKVf4B1L3kCMi13cQCvELA3yA6i9AFalO4msXc 8/5mqBK9u0c/UzUWJCQpN7ENZtqVJ1o51mX2xovUd++ho20bj2BnqIOCvtDKPaagn+zpV RSJh+FuQFPD6KYoT657iNqbiPaUWrY4eJ5TRdyp3clBa0xf18C84Xi3P5ua9mwqhYo5tN 3UEbD/wPtyKfgWEl/ZMaov+GyA7Qrw1v2SSWbAnM1gt7XdL27brT8voIgwjNyftfSiuUb lsaXTEH3uuPVqAe4ALkl3qfswNjVvvSjoxDzi/uP45sCFoZcBl/aEHe1smcB9Br+gOA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794206515; h=DMARC-Filter:X-Envelope-To:DKIM-Signature:X-Envelope-To:Received: X-Mizu-Trace-ID:X-Migadu-Flow:Date:From:To:CC:Subject:In-Reply-To: References:Message-ID:MIME-Version:Content-Type: Content-Transfer-Encoding; bh=ZzG+B6v080Z5FbgsRfwns3KQJ2PJp7hPF1hqKQeiP0I=; b=jf/A/2SbhRBHngpGqXVI3/PeRkj/DHIzKshyWP4nBPbIE7gF8q11ASQnorsajZMMCgbG TRwrHEpXQkaSmug5Rn47SgI0cePFASieZLaCExSiXbqZ4GcnQiFWwT02jI6h857WupU4G J5KS5Ng5Jh+yYwDk8XeFBslP0xalipLrgVGO0AQIffXHwhr2oELJ4UTcF8s/w4cWHCJ0e YCmVhZd/rsIHVmugIkhfvTapKxh60rPyy+UEmKsqeZYTfGMwoZ6qcPxiknwPUYcOjsmWh H63vqxX5P0m3O9Jb6eHeNbPt68XayefvxEXevWGGy94jtXydK/Re24unzvZp9+YerIw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256 header.s=key1 header.b=v7F+PgyF; arc=none smtp.remote-ip=95.215.58.241 Received: from mta1.migadu.com (out-241.mta1.migadu.com [95.215.58.241]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 006D4606A323 for ; Mon, 9 Nov 2026 06:41:52 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 006D4606A323 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256 header.s=key1 header.b=v7F+PgyF X-Envelope-To: linux-kernel@vger.kernel.org DKIM-Signature: a=rsa-sha256; bh=nox8bTJLykF11nD4yonwkiNc7pDMafIXe+7tPzIa2gA=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1794206511; v=1; x=1794811311; b=v7F+PgyFV/RlIoNzZkTNW/LpuHk+gaaL8XmTOU2rbR7vYbYWxjVgo75l4TUdZKiyvxMmCznH N5tsw4GpOwRaDjJ9u9Kv5RaMwwyYqfH9aktHAV/tLPlpzisRb/yqP0yMQ6b9KmMqJQ6ykDGPRSk L8dJrMtP8XueB+Z18vLDCVlA= X-Envelope-To: linux-kernel@vger.kernel.org Received: by smtp.migadu.com with ESMTPS id 2938fe24122b836d; Mon, 09 Nov 2026 06:41:51 +0000 X-Mizu-Trace-ID: 2938fe24122b836d X-Migadu-Flow: FLOW_OUT Date: Mon, 09 Nov 2026 07:41:46 +0100 From: Luka Gejak To: Zeshan Ahmed Nobin , linux-wireless@vger.kernel.org CC: linux-kernel@vger.kernel.org, Ping-Ke Shih , Kalle Valo Subject: =?US-ASCII?Q?Re=3A_=5BPATCH_RESEND_rtw-next_v2_1/2=5D_wifi=3A_rtw88?= =?US-ASCII?Q?=3A_8822c=3A_fix_out-of-bounds_access_in_cck=5Fpd=5Fset?= In-Reply-To: <20261108182837.682661-2-zeshanahmednobin@gmail.com> References: <20261108182837.682661-1-zeshanahmednobin@gmail.com> <20261108182837.682661-2-zeshanahmednobin@gmail.com> Message-ID: <0FD97102-7E9C-47DA-9B52-7F7A837E2924@linux.dev> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Hi Zeshan, Thanks for the v2. One minor thing. On November 8, 2026 7:28:36 PM GMT+01:00, Zeshan Ahmed Nobin wrote: > diff --git a/drivers/net/wireless/realtek/rtw88/rtw8822c.c b/drivers/net/wireless/realtek/rtw88/rtw8822c.c > index 09315d23e2c4..6343568285bc 100644 > --- a/drivers/net/wireless/realtek/rtw88/rtw8822c.c > +++ b/drivers/net/wireless/realtek/rtw88/rtw8822c.c > @@ -4406,6 +4406,13 @@ static void rtw8822c_phy_cck_pd_set(struct rtw_dev *rtwdev, u8 new_lvl) > nrx = (u8)rtw_read32_mask(rtwdev, 0x1a2c, 0x60000); > bw = (u8)rtw_read32_mask(rtwdev, 0x9b0, 0xc); > > + /* > + * cck_pd_lv[] only has entries for 20 and 40 MHz. A chip that stops > + * responding on the PCIe bus reads back as all ones, giving bw = 3. > + */ > + if (bw >= ARRAY_SIZE(dm_info->cck_pd_lv)) > + return; As far as I can see bw doesn't have to come from the chip here, since rtw_set_channel() programs the same value it stores in hal. So maybe this could just be bw = rtwdev->hal.current_band_width; CCK PD only runs on 2.4 GHz, so that seems to always be 20 or 40 MHz and the check could go. Or is there a reason to read it from the chip that I missed? Best regards, Luka Gejak