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 C7E5E3DDDC1 for ; Thu, 26 Mar 2026 10:48:05 +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=1774522087; cv=none; b=gl/2kojPBgRF8CsE3rkXDtO945BAUmQ5p6rfnrfzx1nNyu7Xmsh7kahpxx9QTosi7cli+Q3PKZug1YxzNFVq3s9by5htlwkSk1JiTUtUWZPVDP4rsOQ5WxuvWtJz03UAPALlw0xbi6tjah3ZCdcAkpkTNQL0i9pH+S9y69xj2KA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774522087; c=relaxed/simple; bh=uIcRW3F8SaRvIJDZPqw8GyIEkhv2qqW+v38gA48RCtE=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=uQ+TDVHR+zUhGF9UVjTEpW69ihScs80zwJgCs5/4f3C2Md4mon9vl53zSTxzt7Z3dURev6GRs/KqVZAehhlut5uysjNPCNmACnQyeek3PQRwJzQM7yV0evsr/0eoT9+BET0it0O6pNbVDnCSdSLbg7m1qOxQmrx6H8uCxKo8b2Q= 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=Hs6kl9HW; dkim=pass (2048-bit key) header.d=redhat.com header.i=@redhat.com header.b=qWVotACq; 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="Hs6kl9HW"; dkim=pass (2048-bit key) header.d=redhat.com header.i=@redhat.com header.b="qWVotACq" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1774522085; 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: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=hAqmLcqBurjjp0ibi2uwhQMZrLCiAudEnAKz8jekrCE=; b=Hs6kl9HWwORQ1IQ1dhmsZYi8fTqDNSknnA2mITYBehynxPQ0BFNCXNx91ujnagssJaRjHF HMBtecPTNkY6OJmqjHnLyz+cC3htJMHbyl1lDRvf6S5tUfmPHEZGFmBNCLWtwr8OBlqjMB 0NCdQ+upBn2+mKJHsFMoP8gMw/PtN3I= Received: from mail-wr1-f72.google.com (mail-wr1-f72.google.com [209.85.221.72]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-74-RYKdFCJVPbiEBObFD1aB2w-1; Thu, 26 Mar 2026 06:48:03 -0400 X-MC-Unique: RYKdFCJVPbiEBObFD1aB2w-1 X-Mimecast-MFC-AGG-ID: RYKdFCJVPbiEBObFD1aB2w_1774522082 Received: by mail-wr1-f72.google.com with SMTP id ffacd0b85a97d-43b95f9f837so370094f8f.0 for ; Thu, 26 Mar 2026 03:48:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=google; t=1774522082; x=1775126882; darn=vger.kernel.org; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=hAqmLcqBurjjp0ibi2uwhQMZrLCiAudEnAKz8jekrCE=; b=qWVotACqroRJDuKQ9pkMhLRvbeXTGAMoExzLJR9gapuvVz+bPvAHlOxiFJqPJjO1p3 YaYcfxgTVncKZjOr42H/dQHTMavzeHoFKGHC2JTewfdY8CVI7fDxJ5meTEl8P7OONYJ/ Ca4YglZv/uimaeIz8i4YwusXBI4c0Auo2Ntelhj278z5Z1YbWMAw+wvY6kh1GPZQ/ylW N3R3Oo0ZhdvWI8dumiRzZj2ldn+sstnJlMYsHMWhzdSWOSa9tbnGFGoURW12sBvM5U1a QJe1F1l8MlYSclXmC/i6aQZnjvH2IVIc/5CKkXe3abhp/uDbuPst1qmesf8pBGYVzuUz PO+Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1774522082; x=1775126882; h=content-transfer-encoding:in-reply-to:from:content-language :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=hAqmLcqBurjjp0ibi2uwhQMZrLCiAudEnAKz8jekrCE=; b=WZctbYUsdoBQBFlC14OeqqA9owpEDEt18skMk9X34FFPbpPQNK+LbDqoErmEalUtgq ig4pYlD1i3vj8kmqaisEKzFOqCqEsgHM3XjQTeIzNW9zzo8t0Netd+31EV5fNNDEYWYz abMRrnn6dV/u8BCa9BMLjdLSA2WMOl+0yaOt9qSekc8eTRoW9P395gayBF23MlOn6k95 jrQabIHT54QFWtEYpDGS/t7fcZTKrNvcrxRu5jI+6oG1ZcH6hoIDjZXDMY2pGMjQEiJI Cki5ZwPEnqzEwv2DitUeCBScprm7QUkGezyD0aM2Avjr9h5pSX2AHiNbix6Upj5e2O7N A9Dw== X-Gm-Message-State: AOJu0Yzk7KrT58zPkDi6dI71+iHu+T5frSDWWpa1dyZxdeRYq41hjQF8 KXkcMjUfmZC+J1UP4oHKJ7LG67yiDiLmARTqMygo8Wk12o0NWKmVLqgx825aKtRzR2epBVgTgrN yr+cb7PZe1np5o2xjgf0OiWXKcyArAASbZJOSvEOL/EwSgnUFVmMNp7t/98towdcpRA== X-Gm-Gg: ATEYQzy1Ff18MD+5ImwY4CU6Z0pu2SG9ki5Buq3bUE+jqqFIhQMJayZgiQdaRs/aTYy nNa+i0zzF/+jP8/W+3/hBnvk6OrONNCaCYRYkP6oEhXJFoMDzL1aqVbnKh1jb5E1ibpA+3OHC3J 4/RJ93Y8byQIV4kk/vY7FFOClb34lPEb+Eo5azua6tsnej/AeWQ4JqrCdsSc6b+NDbctWlWckQC e6ZBtQzVFsH9DWMMtzmPym8IEREAm/PyafD5nxz6rgNyzgCRtDwqEEwlgQq+CLl9bUU/CkYnSr9 3OEMUhuvUr5LeecGgqjcpfGF0ieqcjB5Kjz8QqUfvH2m+/U7i1xMXF1hGlpk2GhhJeO591DMx8G MEfCqugPqB79c5JOcbg1PS53UTXk4rkqyKOV0MLtIAH/s4YUqufq3YYx+ X-Received: by 2002:a05:6000:1842:b0:43b:3f2d:7d43 with SMTP id ffacd0b85a97d-43b8898d4a9mr10906925f8f.8.1774522082031; Thu, 26 Mar 2026 03:48:02 -0700 (PDT) X-Received: by 2002:a05:6000:1842:b0:43b:3f2d:7d43 with SMTP id ffacd0b85a97d-43b8898d4a9mr10906883f8f.8.1774522081511; Thu, 26 Mar 2026 03:48:01 -0700 (PDT) Received: from [192.168.88.32] ([212.105.153.60]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-43b919df85csm9896629f8f.28.2026.03.26.03.48.00 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 26 Mar 2026 03:48:01 -0700 (PDT) Message-ID: <3dd87db5-ec50-4019-b320-79319475e746@redhat.com> Date: Thu, 26 Mar 2026 11:48:00 +0100 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] NFC: pn533: bound the UART receive buffer To: Pengpeng Hou , netdev@vger.kernel.org Cc: linux-kernel@vger.kernel.org, tglx@kernel.org, mingo@kernel.org, kees@kernel.org References: <20260323072409.60086-1-pengpeng@iscas.ac.cn> Content-Language: en-US From: Paolo Abeni In-Reply-To: <20260323072409.60086-1-pengpeng@iscas.ac.cn> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 3/23/26 8:24 AM, Pengpeng Hou wrote: > pn532_receive_buf() appends every incoming byte to dev->recv_skb and > only resets the buffer after pn532_uart_rx_is_frame() recognizes a > complete frame. A continuous stream of bytes without a valid PN532 frame > header therefore keeps growing the skb until skb_put_u8() hits the tail > limit. > > Drop the accumulated partial frame once the fixed receive buffer is full > so malformed UART traffic cannot grow the skb past > PN532_UART_SKB_BUFF_LEN. > > Signed-off-by: Pengpeng Hou This looks line 'net' material. Could you please provide a suitable Fixes tag? Thanks, Paolo