From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (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 DADCC1E0E14 for ; Tue, 21 Apr 2026 02:53:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.168.131 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776740001; cv=none; b=jD7VwgjCSUtmsB1EycIvrCpgJWPoqRLD3m1VYajoMwJq4pEic5sdyCiZHT5KmOFm6hor/ucSE1mM/1aYhrIKVU6Et28N8enjN+qQ3EJbMtXD0N8zDizg3rRCQr0d4qo8xu5Um6Ozy8XGIn5dYuMZej/8vcX1T4oMbyWrBdz2paA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776740001; c=relaxed/simple; bh=4IjoQjwiFeLLeSO5t2hKnPbPnrdsdcns09X8bnj4R0s=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=f9hxt59iU6sKPeoO6rhDD1qGUtthdCKyY35PpDJsY42mejPkZUwV7vRxaNjN+u+WjP+nqft37yVUtAN/B3XHhmFtYJZuyHLKLTzBn3HbqeaDePaG0GDEOlHIF63Kf4UOyvo8eweEW+JGMQ3S7bSWticEI4ACgnr1uWW81DcYWgI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com; spf=pass smtp.mailfrom=oss.qualcomm.com; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b=GXamZDbu; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b=Gtykg6yq; arc=none smtp.client-ip=205.220.168.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b="GXamZDbu"; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b="Gtykg6yq" Received: from pps.filterd (m0279867.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 63KJ0ROO1532102 for ; Tue, 21 Apr 2026 02:53:19 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=qualcomm.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=qcppdkim1; bh= nL9xUfvTkwQZncAFS6niHvBtOoZf0aD/RZbBCfCG6WA=; b=GXamZDbuUaHABGfK aJuurbG23e5ntre5qvoQEd+XkZ6jN1novvAz6fn9kGhVfdwgOt0fg/AndDyiLUC+ EOjqyufcHc/iXz5ULKQXVelzdAgd7UfpZlqqs3A0KlLs8qOTGx8nJEdhRDegC8Ro L5KHd7GfTcnjB4vrSr0GvGDcCzDl5Rq2PFIHLEbr5I+sBy2y1Sq1yemu8dWKMVYl g0w2+sTkWrzdZG0KcspgI/d9J+eaqG2uynUVmSU9aU2hODtJlOLSKG6mB17vqUQt RNsOWiWgoCpedwSIozAu7y/19o7enEd8rPfW5xmqQbERM4xiisQ/StbjIBgOMTFj 6DO4YA== Received: from mail-pl1-f200.google.com (mail-pl1-f200.google.com [209.85.214.200]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 4dnfus4284-1 (version=TLSv1.3 cipher=TLS_AES_128_GCM_SHA256 bits=128 verify=NOT) for ; Tue, 21 Apr 2026 02:53:19 +0000 (GMT) Received: by mail-pl1-f200.google.com with SMTP id d9443c01a7336-2b24a00d12cso38292625ad.1 for ; Mon, 20 Apr 2026 19:53:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oss.qualcomm.com; s=google; t=1776739998; x=1777344798; darn=vger.kernel.org; h=content-transfer-encoding:in-reply-to:content-language:from :references:cc:to:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=nL9xUfvTkwQZncAFS6niHvBtOoZf0aD/RZbBCfCG6WA=; b=Gtykg6yq3LdnYNeifzQyijcQ+7lap2JkH/tF4Hs8BmDZ2LVTyGPX6feaS4mqmr3CwW b3cwkfkJjTHVqxdR5zXjBIP9x6SLGtAc/QSH31GgNFmTBZx81ngkBYDR2iXIht7exyOV udXmUF0DiHN8m/1DZQQ/co6VJ0Lemzgw8te1ZwIO862eS2nnAdbJLCd3RGWh0Dd9pkB4 wiCVhGeulthz0JpmUYVFtSzOomfU5tA2UT+JZaQ5GR53oLaSnF8lgb9J1ChW81+ZKkPv +Su9wAhNxhXns1mSy+mv8RXctWoZIARrDy2zZ6U0c6MOOnqhRqz/0JXJVnCvESO3yUdp G/KQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1776739998; x=1777344798; h=content-transfer-encoding:in-reply-to:content-language:from :references:cc:to:subject:user-agent:mime-version:date:message-id :x-gm-gg:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=nL9xUfvTkwQZncAFS6niHvBtOoZf0aD/RZbBCfCG6WA=; b=tJFrHcLK/ok9GhFBlg8ZIQOa0QmQk/qIyrRALLXuINWC9uXosRZr4/gE3qRp8sSDSp EQL5+ExXVanbq9OvxrAk+wggmdpKyKppSYYmoScD0R6nC0++Ouh/Ofeit7HyYkJ2Wu3W IvfIJqPYxwkTzBKXyxuxWdVknIAXTc6t1DeCoWC/03ZuEOZEz8yi+dM+Qf9u023tM9Ei 8n1FvuI6kEAoswyGOCVrLlIdFocCkHKIGhEqQ5cEwxmPpHokhIGISsPRouKHhA2XubMe IINvfSJ0vMjfmb58IqCCD3GE6Y07QlZ9IRjGR9UkCiPNcmXuS5mvdZAMn5BxQePXynjR uMIA== X-Forwarded-Encrypted: i=1; AFNElJ8C09RKTlwzkg126xujrkgIq9pFS4L8albSqpHHmcpEfAN9nW51muTkPeSIOZauy0khZB3HdJuzZixtH+U=@vger.kernel.org X-Gm-Message-State: AOJu0Yw4oHdvJ6sAPN6nHwwfwr1cyFuhw0InIO/UCQJRY+KW6f63r3jF sKzGhQxsGPulh0AQXkn0aKDNECk6ENCSRl7DbxBoubE69C/3rdO1PN18IR2WDRC+mqYBpVNABgA D4o5r5SZtdVOVBGfR/fCTeNkqvMSRPgB7UswDGhDeKWsrmqCCJEpKKhRXY8Aisn3FSkg= X-Gm-Gg: AeBDieuy5vem3108PDPYdgCPoCK3Wn9UoPgIjvJvG1nrRkktwnFf79YfC/qle2ZyE9x onR6c36VOgnZ8k2/aBv2yhXu0I32L43x2suC2+djZHBVYsoTBhaVP6C/cYMadFqdwB1RnBUVOba t5R/00r/Tx0VBfNT8a1CZr2KtluXDBHfDMnLqrUBKq5JpoVb8AUQZ+7RnTJuFDkQGVOas8cXwoN CWuK1yETpu8iDIQ40P+22Jfj/lDGRGV6tlEor0YqhNlMLkhafeQG/0eGclsnnPNBFaOhnAQHImU 18KfMnGX/AYjlxILOk+TAaz98iLslcEM/bCNxrgYMpw8hthc0vByLhNEuWwDKAyUJnoPsp4xaLZ u1uWPAJyPBDw2xkMeL9kzA7wgyfrCrPDICckRHKoZxa700DwV70bOV17zOnQ59E6gbGebnGJH7R r9h5lBtZHY7yci7KqEGqeYp4Sv6TLWrg== X-Received: by 2002:a17:902:6905:b0:2b2:49a7:a5bd with SMTP id d9443c01a7336-2b5f9e770c5mr113292085ad.1.1776739998390; Mon, 20 Apr 2026 19:53:18 -0700 (PDT) X-Received: by 2002:a17:902:6905:b0:2b2:49a7:a5bd with SMTP id d9443c01a7336-2b5f9e770c5mr113291805ad.1.1776739997873; Mon, 20 Apr 2026 19:53:17 -0700 (PDT) Received: from [10.133.33.231] (tpe-colo-wan-fw-bordernet.qualcomm.com. [103.229.16.4]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2b5faa16e72sm117632635ad.19.2026.04.20.19.53.14 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 20 Apr 2026 19:53:17 -0700 (PDT) Message-ID: Date: Tue, 21 Apr 2026 10:53:13 +0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH ath-next] wifi: ath12k: use kzalloc_flex To: Rosen Penev , linux-wireless@vger.kernel.org Cc: Jeff Johnson , Kees Cook , "Gustavo A. R. Silva" , "open list:QUALCOMM ATH12K WIRELESS DRIVER" , open list , open "list:KERNEL" HARDENING "(not" covered by other "areas):Keyword:b__counted_by(_le|_be)?b" References: <20260313001434.118010-1-rosenp@gmail.com> From: Baochen Qiang Content-Language: en-US In-Reply-To: <20260313001434.118010-1-rosenp@gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDIxMDAyNiBTYWx0ZWRfXzownxsxm8b94 Bz+iCk7qKOBBsK7bkeRNQEHetFHJ53lPPhczcM4tK12Nt+65IQumOyyCo0IUfZtuilCsdRvJaea ywzm4Rv19Gj31R58FHZAa7M1jNgACgTFESKLgN92aVue+TP6lM5ocuyonLZgelpYHiVYazLzhwt BGCRtSPHFM3Z/K0sU0ROmJPqpwPhF4DqrI6of9rwi0mUGzuG4+zgEYDbiWX20TYyw8iB+ZumKsb XRagY7716B9V0z4uuCG8Br/oN0LFxgHJa/S3o4j5hk4H/MzikBX+m6XZaM401Hl/svT9Qh/VWT/ gTgiwN4pJa+V3Plf56TcDwMI/iNW4cVcUv/D4MVpf77MVPxli5NC4nPCo6A1AGpo1zUJDDi2I0Y Gmp54GHFDZsvNdlArcbP9VqN3BkLjnNs+Rtd96M22KwzkKEZvv2QbHRaslNq6lkwGBssmB3T5m6 XCxJFDm1kHwzVliu1dg== X-Proofpoint-GUID: Uj9AONfdTF4QmO735-4Odc0ACyPfMssy X-Authority-Analysis: v=2.4 cv=PMQ/P/qC c=1 sm=1 tr=0 ts=69e6e69f cx=c_pps a=IZJwPbhc+fLeJZngyXXI0A==:117 a=nuhDOHQX5FNHPW3J6Bj6AA==:17 a=IkcTkHD0fZMA:10 a=A5OVakUREuEA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=eoimf2acIAo5FJnRuUoq:22 a=pGLkceISAAAA:8 a=EUspDBNiAAAA:8 a=Axv3upY4dNLjRVsui8cA:9 a=QEXdDO2ut3YA:10 a=uG9DUKGECoFWVXl0Dc02:22 X-Proofpoint-ORIG-GUID: Uj9AONfdTF4QmO735-4Odc0ACyPfMssy X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-04-20_05,2026-04-20_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 spamscore=0 impostorscore=0 adultscore=0 lowpriorityscore=0 suspectscore=0 priorityscore=1501 clxscore=1015 malwarescore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604070000 definitions=main-2604210026 On 3/13/2026 8:14 AM, Rosen Penev wrote: > Convert kzalloc_obj + kcalloc to kzalloc_flex to save an allocation. > > Add __counted_by to get extra runtime analysis. Move counting variable > assignment immediately after allocation as required by __counted_by. > > Signed-off-by: Rosen Penev > --- > drivers/net/wireless/ath/ath12k/mac.c | 29 +++++++-------------------- > drivers/net/wireless/ath/ath12k/wmi.h | 2 +- > 2 files changed, 8 insertions(+), 23 deletions(-) > > diff --git a/drivers/net/wireless/ath/ath12k/mac.c b/drivers/net/wireless/ath/ath12k/mac.c > index 553ec28b6aaa..b7c43a64e37b 100644 > --- a/drivers/net/wireless/ath/ath12k/mac.c > +++ b/drivers/net/wireless/ath/ath12k/mac.c > @@ -5611,12 +5611,14 @@ static int ath12k_mac_initiate_hw_scan(struct ieee80211_hw *hw, > if (ret) > goto exit; > > - arg = kzalloc_obj(*arg); > + arg = kzalloc_flex(*arg, chan_list, n_channels); > if (!arg) { > ret = -ENOMEM; > goto exit; > } > > + arg->num_chan = n_channels; > + > ath12k_wmi_start_scan_init(ar, arg); > arg->vdev_id = arvif->vdev_id; > arg->scan_id = ATH12K_SCAN_ID; > @@ -5638,18 +5640,8 @@ static int ath12k_mac_initiate_hw_scan(struct ieee80211_hw *hw, > arg->scan_f_passive = 1; > } > > - if (n_channels) { > - arg->num_chan = n_channels; > - arg->chan_list = kcalloc(arg->num_chan, sizeof(*arg->chan_list), > - GFP_KERNEL); > - if (!arg->chan_list) { > - ret = -ENOMEM; > - goto exit; > - } > - > - for (i = 0; i < arg->num_chan; i++) > - arg->chan_list[i] = chan_list[i]->center_freq; > - } > + for (i = 0; i < arg->num_chan; i++) > + arg->chan_list[i] = chan_list[i]->center_freq; > > ret = ath12k_start_scan(ar, arg); > if (ret) { > @@ -5674,7 +5666,6 @@ static int ath12k_mac_initiate_hw_scan(struct ieee80211_hw *hw, > > exit: > if (arg) { > - kfree(arg->chan_list); > kfree(arg->extraie.ptr); > kfree(arg); > } > @@ -13735,19 +13726,13 @@ int ath12k_mac_op_remain_on_channel(struct ieee80211_hw *hw, > scan_time_msec = hw->wiphy->max_remain_on_channel_duration * 2; > > struct ath12k_wmi_scan_req_arg *arg __free(kfree) = > - kzalloc_obj(*arg); > + kzalloc_flex(*arg, chan_list, 1); > if (!arg) > return -ENOMEM; > > - ath12k_wmi_start_scan_init(ar, arg); > arg->num_chan = 1; > + ath12k_wmi_start_scan_init(ar, arg); > > - u32 *chan_list __free(kfree) = kcalloc(arg->num_chan, sizeof(*chan_list), > - GFP_KERNEL); > - if (!chan_list) > - return -ENOMEM; > - > - arg->chan_list = chan_list; > arg->vdev_id = arvif->vdev_id; > arg->scan_id = ATH12K_SCAN_ID; > arg->chan_list[0] = chan->center_freq; > diff --git a/drivers/net/wireless/ath/ath12k/wmi.h b/drivers/net/wireless/ath/ath12k/wmi.h > index 0bf0a7941cd3..190e7a4a92d0 100644 > --- a/drivers/net/wireless/ath/ath12k/wmi.h > +++ b/drivers/net/wireless/ath/ath12k/wmi.h > @@ -3586,7 +3586,6 @@ struct ath12k_wmi_scan_req_arg { > u32 num_bssid; > u32 num_ssids; > u32 n_probes; > - u32 *chan_list; > u32 notify_scan_events; > struct cfg80211_ssid ssid[WLAN_SCAN_MAX_NUM_SSID]; > struct ath12k_wmi_mac_addr_params bssid_list[WLAN_SCAN_MAX_NUM_BSSID]; > @@ -3595,6 +3594,7 @@ struct ath12k_wmi_scan_req_arg { > u32 num_hint_bssid; > struct ath12k_wmi_hint_short_ssid_arg hint_s_ssid[WLAN_SCAN_MAX_HINT_S_SSID]; > struct ath12k_wmi_hint_bssid_arg hint_bssid[WLAN_SCAN_MAX_HINT_BSSID]; > + u32 chan_list[] __counted_by(num_chan); > }; > > struct wmi_ssid_arg { > -- > 2.53.0 > > Reviewed-by: Baochen Qiang