From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-179.mta0.migadu.com (out-179.mta0.migadu.com [91.218.175.179]) (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 ABA5E30E83A for ; Mon, 10 Aug 2026 01:19:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.179 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786324794; cv=none; b=MJzq5pn93R0V0pzfV5Ly4ReUgp8KTfKp67WFn4YFJ2tNmP3PogJwa6y9Z30RaV8rUnkDRqSn0fiIPuYBBU+yWOX4zcaq2KM4IU3J6bSmIdPR0peX1wDSF8Brsk8K4f8XVIUNeNToadlPLO/8SsH6P2WhdvVte4R+iWECGd4pcHo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786324794; c=relaxed/simple; bh=gT2//A7PpTwcyMwaGwBooEU/BfIWVuEWXZZ6hOn9V6w=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=G5sSp+X0r7aVH1Bu62ILX/kIg0l6rOsU4AIwtfh5m4bjIroC91JKQOK4p9egzcJSgo8bv1LBqX2NaHh5Ezoqebl4Wo9Guocx9uoQy4WrnAyKKC6VB9KwS+0rz0g51ScgspOvQxAn+x6qQGTxKOrW9esz1xk4V5e6+lMdkn+o6+4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=m2/4ger4; arc=none smtp.client-ip=91.218.175.179 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) header.d=linux.dev header.i=@linux.dev header.b="m2/4ger4" Message-ID: <01f94272-da18-4a6f-8907-c482522a8ae6@linux.dev> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1786324788; 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=gT2//A7PpTwcyMwaGwBooEU/BfIWVuEWXZZ6hOn9V6w=; b=m2/4ger4NCFPcjXI8nUz2CHVUQjrmnap4D253sYGL0uHBrV4OP3kNM9C231jQMe1AMvZnS S8jS+sM9WS457YRxaBMyrBEAu5qY83vzfdVqiMZo5buW7SbvjUIZbeN0/0sQpEg/00Uqb4 E+565gVWGMLEmpmUIq7vlpk8UsQt+kQ= Date: Mon, 10 Aug 2026 09:19:28 +0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Subject: Re: [PATCH net-next] ppp: update channel locking comment and doc To: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , Jonathan Corbet , Shuah Khan , Breno Leitao , netdev@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Paul Mackerras References: <20260807060153.1380548-1-qingfang.deng@linux.dev> X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Qingfang Deng In-Reply-To: <20260807060153.1380548-1-qingfang.deng@linux.dev> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Migadu-Flow: FLOW_OUT On 2026/8/7 14:01, Qingfang Deng wrote: > Commit ec4215683e47 ("ppp: defer channel free to an RCU grace period to > fix pppol2tp RX UAF") defers freeing generic channel state to an RCU > grace period via call_rcu(). > > Update the SMP locking notes comment in include/linux/ppp_channel.h and > Documentation/networking/ppp_generic.rst to reflect that in-flight RCU > readers can complete safely after ppp_unregister_channel(). > > Reported by Sashiko. > > Signed-off-by: Qingfang Deng Sashiko pointed out more issues. I should keep the comments for now. --- pw-bot: cr