From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=172.234.252.31 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793718091; b=vb6WH4Yoi3pooCSi2N90A080CRSh6CypMPfQrno+LeuPD/x1FfAAJP/jlrNeOCWC1NM0 4WzQ3pTenCDZJ8OiP4VAfIubWJwlOiW0oCncslaT0HuJBLnP6YA7zgmndxkSrU5cR+/Bn vGaO/bDIDCHpgFJ2A5MQ+bXX60THSBCmIhcBjKqLfRgtfOiWyXLuc9NV4NQeRYaZxKYgb hfbHnzlxTmJ8Q34ISrQTUZqGPX2+/3F7zAvmE64m2botW70HbQHP4GIO4Pi1mHSmmpmg1 3riBAYr+UJs8wiCele6g89CGI8V0I1pXdmA4brh2PZ1mgmB9rWmgnnkUHl6+lOHFgGQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793718091; h=DMARC-Filter:Received:Received:DKIM-Signature:Message-ID:From: Subject:Reply-To:To:Cc:In-Reply-To:References:Content-Type: Content-Transfer-Encoding:Date; bh=WfzPGb0Mse4d7j/Ua/7Hqcs84ZaSl689mor9HstQNz8=; b=5DksSy94M5EyaxCxtbCTM2uLlBw6DstFNluUP3SPpJdToPcJNgR59TOxsA5pXGoWqghP 1PAGv0LsvMnvRlEb9pWveS2Wyf8bEV0XXa16JSZcULhGKwAiMlVf3Ck0OecYHQa8LTyeI oxyhcQzG/4TR52577r2DnSPFG0AhmiieZd+Dh6lDUzOtKzbxk9A7/KZe8Z5ReSY0zMqW3 iIGqEm2nKI5Yk9WYloUEb9xo2IwC6fV5YsrfMzCA0h5/A32McG7VJMsQhALqgkYVdHLHH mo2N83hDPaDX3c1XUJBtWyER5qTmux2TV8eGk4OPwTF3Vqw0Y28gBNnJZ6OrLTL0HqA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=kernel.org; spf=pass smtp.mailfrom=kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=VraLAnBB; arc=none smtp.remote-ip=172.234.252.31 Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D90B560A382C for ; Tue, 3 Nov 2026 15:01:30 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org D90B560A382C Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=kernel.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=kernel.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=VraLAnBB Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 9C9BE40DC3; Tue, 3 Nov 2026 15:01:30 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id EA2A41F000C1; Tue, 3 Nov 2026 15:01:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793718090; bh=WfzPGb0Mse4d7j/Ua/7Hqcs84ZaSl689mor9HstQNz8=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=VraLAnBB8iEvmuoFb3nDU7FUs/OmRWlZd9pI9El7xtmvFcFjZ+qsTCFtm8qJ9xnTM kZFFNDj4VyO1XZNaC3TdXCV7k2MHalKXAIfEl24qYuy3Q/kp4jATM2kbbUSYelPIDC tyQNwhUsx40ck67Idycq/g4Mx0MXAM8L3yCIUU5aup1rNinI8ezvlj8cI9SIkBs2YI YhTRb9/DSO2hApTFTlEyef8iIRyHggmy1jCTzzV2ScJbqWgWFlD6/4XdOY8PW+tzGA rELCIcGBlWlXAgY4tOu8FssC4VZR00sq7XeG1Rh0Am+N2IMnn6IPB3We00OphZHjDm jWEsDfW5tAAQg== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [PATCH RFC 12/16] proc: copy in writes to the network namespace entries before pinning Reply-To: sashiko-reviews@lists.linux.dev To: "Christian Brauner" Cc: "Linus Torvalds" , "Jann Horn" , "Josef Bacik" , "Chris Mason" , "Jeff Layton" , NeilBrown , "Eric Dumazet" , "Thomas Gleixner" , "Al Viro" , "Jonathan Corbet" , "Christoph Hellwig" , "Greg Kroah-Hartman" , "Joel Granados" , "Kees Cook" , "Jan Kara" , "Jan Kara" , linux-s390@vger.kernel.org, coreteam@netfilter.org, kexec@lists.infradead.org, linux-pci@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-usb@vger.kernel.org, samba-technical@lists.samba.org, linux-m68k@lists.linux-m68k.org, linux-serial@vger.kernel.org, "Takashi Iwai" , linux-ext4@vger.kernel.org, "Chuck Lever" , tytso@mit.edu, "Heiko Carstens" , "Vasily Gorbik" , "Alexander Gordeev" , "Christian Borntraeger" In-Reply-To: <20261102-work-procfs-core-v1-12-75df35e4f8b8@kernel.org> References: <20261102-work-procfs-core-v1-0-75df35e4f8b8@kernel.org> <20261102-work-procfs-core-v1-12-75df35e4f8b8@kernel.org> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Tue, 03 Nov 2026 15:01:28 +0000 X-Mailing-List: linux-m68k@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list > proc_simple_write() already hands ->write() a kernel copy of what was > written but makes that copy with the entry pinned. Let procfs make it > before it pins the entry instead. That covers everything created with > proc_create_net_data_write() and proc_create_net_single_write(), the > afs files and the rxrpc stats. >=20 > So a write to a proc_create_net_single() file without ->write() can > fail with -EINVAL or -EFAULT now before proc_simple_write() gets to > refuse it with -EACCES. >=20 > Signed-off-by: Christian Brauner (Amutable) Sashiko has reviewed this patch and found no issues. --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20261102-work-procf= s-core-v1-0-75df35e4f8b8@kernel.org?part=3D12