From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (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 D624C2641CA for ; Wed, 17 Sep 2025 09:33:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758101598; cv=none; b=JSBxeesSx5k8yciGq2BKsAp1ZB3B5mGxzgDBdOvsdZGBNNOyBj2/hNbD53VWJu6eUFVZ8Sz8ahdWLT6+LjHOpAxLLLTOEsUr488n3cykRGZZ/F9N0SspAtk20e7IJCczGGqvKT7axJoMyfltxhQuXpbm06wTA2gCwotc68I4QZg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758101598; c=relaxed/simple; bh=oZ25358ZVrqeteNG0nPOUPm0hAC6b9/lBoQKa+CuvY4=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=N7cAdedaFP8F5U99FTBtb8pyGGJzHQDBD1Mz59nWrSo5el5AFVC4riTMd17eaAcqcZi92dwzB4yZ3jB1usDR+tpqnEgV71Smpm6ADpDIcoo5xOTyqYk4az4tfvKqTnDaJWcpnYxsrbbPC7fvmCDK9AUC5gSDgDu/3FPm+Xz4ShI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=VYgkSQbP; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="VYgkSQbP" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1758101595; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=89BDSPXQuFlvPv95q9QMB56awWQ5KCn+7gDQqVOL5IQ=; b=VYgkSQbPWO35QAT4LrBHQgDH2eQDAF9AMNWv+gXKDvRea0V1jIyswTXiMO5RYQeDwGCoam gZw30zyxwCBWe0ytphFMhu2gBNl0Q6Pd0jF8iUNAI/d0TzSSlLpKQzG0/5zUX0J6bK6xLf uWcpX2YMpx3QcYHhR3jgveso9KjC5F8= Received: from mail-wm1-f72.google.com (mail-wm1-f72.google.com [209.85.128.72]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-12-OWG9LdYoMkaetgsGJBiL6w-1; Wed, 17 Sep 2025 05:33:14 -0400 X-MC-Unique: OWG9LdYoMkaetgsGJBiL6w-1 X-Mimecast-MFC-AGG-ID: OWG9LdYoMkaetgsGJBiL6w_1758101593 Received: by mail-wm1-f72.google.com with SMTP id 5b1f17b1804b1-45de13167aaso58690415e9.1 for ; Wed, 17 Sep 2025 02:33:14 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1758101593; x=1758706393; h=mime-version:message-id:date:references:in-reply-to:subject:cc:to :from:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=89BDSPXQuFlvPv95q9QMB56awWQ5KCn+7gDQqVOL5IQ=; b=nwqZ5GYK0N+XmZWlZblVA4Ozwpqrnro3RB+ylN7vmzqjpU8j8C0XPThLMmpHim9LEz WihMA3fDLrUamsw0srwhnJfMuAS0/hKTNM+ydlXuYZ+0NNcQj1Opt3R/mZLgCpHq/0LS agMuuakr7Cdhd2tfaxHEieSwsKa0ZGiwF0WhzjLIaLiU7CWLrmnWKrudZXlDLbue2LIw uIgmuvfXr+1uQ2QTcSarzJD8lKUNu3XBZzKnv/WiN1zKVma8oAn9m/97XyztsRhTbP/q pKDRfebqzT1KkP/W+B4RaVu95AiRcsnxjkijTN6PMq1LdTcMtkXEPnAsG9Evkfhi1CNT 7JBw== X-Forwarded-Encrypted: i=1; AJvYcCXZoaCveR+VdtkG6diLzyKBevZtwtQs+cwRc0C0d54qmHAo/4zM+Xn910x3odkibDWpKsDmZP6yL9LNc3DEHtbEAxYwKQ==@lists.linux.dev X-Gm-Message-State: AOJu0YxZ3znyjPeTmvKL6xFbC5tJjdNtaH41yPstgvpPgw+HW3HhAUwK VLSK7OcYzRusowRQY6P7CXegSVKcRp473mRXZh9CV2lYllH0PXwjQi2g7fFfJXerbo15AXyqGQ9 QBPWxik2ZtPuAgjlWBvIgawwwZnEo6/lzO6BPso5A6VmrOz9vCHNInpEIbuZIAnZXREeFRf2nLu Er X-Gm-Gg: ASbGncs7GSdE/lNrMjrQoFZzQQbNTZg4zQCq0Wlv1bbKyVZPHXO6aJQ8NBOaLcMT2Fd PIIfvzkJk4aY/g23CF9FT/QcFMAAN6TxtIGuAbnyxI0LVH6EyUDx12rrajCVHi6SEMGXpz64ngd ACwQ+P62ZvuONd8xOJwyj4vEmKEcm8iqDsUBks5AxY7Pj2zc3tdJJgNgZOoiCiq+THv+Slc+9aQ UHMl+vFIsMPSzuyissbpXhUU4NT+9PCszT22K+5Z+OlM4K8QzTT9IxFlI2G94PSMNTrHCs3/Rkp W2s0zIDb65KQ12gyY3pa+tyw38axZ4wi3RGj6qybq9hHX9d+RG0DNoryPPc1MzmYZH+SklNA2dY jR+MSw0S0SPgOdjbtPNN92Q== X-Received: by 2002:a05:600c:1f8c:b0:45d:7d88:edcd with SMTP id 5b1f17b1804b1-46206b2e1admr16045745e9.30.1758101593133; Wed, 17 Sep 2025 02:33:13 -0700 (PDT) X-Google-Smtp-Source: AGHT+IENXZ4rn06CVJu6gZ71Iaf2lGuFxnBG38Z3AWJjORTvoJCFn1PWRhC71R9PJs2NEILp/czqrA== X-Received: by 2002:a05:600c:1f8c:b0:45d:7d88:edcd with SMTP id 5b1f17b1804b1-46206b2e1admr16045405e9.30.1758101592738; Wed, 17 Sep 2025 02:33:12 -0700 (PDT) Received: from localhost (62-151-111-63.jazzfree.ya.com. [62.151.111.63]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4613869528bsm29227745e9.14.2025.09.17.02.33.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 17 Sep 2025 02:33:12 -0700 (PDT) From: Javier Martinez Canillas To: James Flowers , maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch, skhan@linuxfoundation.com Cc: James Flowers , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-kernel-mentees@lists.linux.dev Subject: Re: [PATCH] drm/ssd130x: Use kmalloc_array() instead of kmalloc() In-Reply-To: <20250914073841.69582-1-bold.zone2373@fastmail.com> References: <20250914073841.69582-1-bold.zone2373@fastmail.com> Date: Wed, 17 Sep 2025 11:33:11 +0200 Message-ID: <87ldmdo23s.fsf@minerva.mail-host-address-is-not-set> Precedence: bulk X-Mailing-List: linux-kernel-mentees@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: 2a9tz_fgtVNbqkd-STuBHNrU-LjyElyEwHDfcziJ5do_1758101593 X-Mimecast-Originator: redhat.com Content-Type: text/plain James Flowers writes: Hello James, Thanks for the patch. > Documentation/process/deprecated.rst recommends against the use of > kmalloc with dynamic size calculations due to the risk of overflow and > smaller allocation being made than the caller was expecting. > kmalloc_array avoids this issue. > > Signed-off-by: James Flowers > --- Reviewed-by: Javier Martinez Canillas -- Best regards, Javier Martinez Canillas Core Platforms Red Hat