From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 C15A025228C for ; Fri, 21 Aug 2026 06:03:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787292207; cv=none; b=ENUCNVYUmTeO8sm+RRgLDBWycwGoAGFyMGHH03ycryFF3e5zqaEAJg4tEChfXgSbX2MeoD2tX88HApLUNpsfadr5Yx4Dv4CMlSYUdfcnXfNYxxcDor4Fka9/R4vmRT8sWx2MDVA225Ta0rrPU77IoE29/Lg1T6kEo76qVlWJNLg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787292207; c=relaxed/simple; bh=dvFVMTjiyBivvMZQCAUvHXSJM1QN3Uwt75drJh4n6A4=; h=Message-ID:Date:MIME-Version:Subject:To:References:From: In-Reply-To:Content-Type; b=MswSl/0R8SO3EpljCMWrnqxZHpJSI8MLAsubQqoaRDdKioqo/CpKC/2pT4psimJZ2NpFU0OQYB4W7qSpCG75gZlkHAN7hv9SbNJjHF6oY2raY9NEdsNJsTqocIlRVzPK5iGgd42wdkqDctVVC6IACqqZcCWiGOD2eoH8LTkPY+Y= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ZlUQk3mQ; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ZlUQk3mQ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E88A71F000E9 for ; Fri, 21 Aug 2026 06:03:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1787292206; bh=TC8I/Jf1A0tJ2FEAcjU7BbGepBsuK6G16w+Tqw048Xk=; h=Date:Subject:To:References:From:In-Reply-To; b=ZlUQk3mQDin2U/yuH4DlBhKb2YnREpx/Ya9kjS25/8xsNznvzLzvxmBaf2DD/YQ2+ 5i7H1NkNiiah3+qOFHvdMmm3M7m93vHju1a7b+jPiiCadUqYVNHnoV+hYtNPbWos0b ZfEb1J6yqEFuTUWTAW4K1uT4Z5meRZfrd1o6Mz2Ge0JBx/F35L0IWXXK9YWqskSyCn NXHt+HOrYjQcW8JoogbIGKU+GNxa29isYWSMROCZw1NGIabPtSvBymUfPr3CDJRCq1 BTLc7couQRfRjSIqsSVhpOEUBA38uCcBzJ/PayqoLYEzZrF1VAZNEqRWEv1WOcXiR4 oHVPtTO2gfTqw== Message-ID: Date: Fri, 21 Aug 2026 08:03:23 +0200 Precedence: bulk X-Mailing-List: mptcp@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Beta Subject: Re: [PATCH mptcp-net 2/3] mptcp: subflow: no need to copy thmac during ulp_clone Content-Language: fr To: MPTCP Linux References: <20260818-mptcp-cook-reqb-v1-0-052dea9a7f20@kernel.org> <20260818-mptcp-cook-reqb-v1-2-052dea9a7f20@kernel.org> From: Matthieu Baerts Autocrypt: addr=matttbe@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit Hello, On 18/08/2026 19:55, Matthieu Baerts (NGI0) wrote: > 'thmac' is not used after that point. > > Indeed, subflow_ulp_clone() is called when the request on the passive > side is over, so when the truncated HMAC is no longer needed. > > Note that in case of SYN cookies, thmac will not be initialised. So > better to remove it to avoid a warning for reading uninitialised data. Note that this modification is harmful in production, and that's why I didn't add a Fixes tag initially. But it is still important to have it to prevent warnings about reading uninitialised data. In this case, I think it is still good to add a Fixes tag not to have reports on stable. Fixes: 263e1201a2c3 ("mptcp: consolidate synack processing.") Cheers, Matt -- Sponsored by the NGI0 Core fund.