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=1793719124; b=ILGgsRgEnHvN9OhxrB69bhLd0gXws7AJHUbOdoWVpeVKCPSh9KeoQm3S6PHYsaVKTgpe 3SwCQ4g2ukf/2wvcR4X5KiqMP3r/9xDLtFDz/6y63oIcruYYzmubmHverY9XluNB+s9BJ zS4u75F4O7HlOxxcrrNTmdR7fXBhnY2aOBS7P9wL+EZemPI8dwwoPffag+TFwSdiBqQLL hXH4PXTvExuIzOSMtdvpVlB1LMa0j32PGc5qbPUlmL3AZV1xNepVwlraGjIp7nWymKZuE S/iWcN9kcXPDpkG5FTYEbotW3tvnhQGuqtc9xmyX31pcKKpmiK2loamvb34YZ5cdRQw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793719124; 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=DuUWXqjsSRZJqvPrRnnQUK8F6HwoSKU+vf+Jc0u1BP4=; b=4M7SRrXAH0KORDMrVyNe+Ojt6EvDP1gx+u2+sJ6T0FMbToyVnPmpQu14Q8AHgjYkhZGP yxS8Phx96MCNjMkLfr6T+ixsHm5MXHhg1V8ctd8erqb4oWn5OeKRtx74eWU9sJJ05iIiE Gzaq4eGmaSMB6OmpBf2finsASqR09qj35Hk/aZ+MCQm8J3UuennPzlxrfD2MkltTBgD3D NKC08itfizJelYF867eO9Z+U2TK+xOfYJWouISVQo6zR32cVIKHB8TmQdMwn1JkqZssC3 Q/AYPJbctj5AidqBT8kkZNPGuh8E/dqywfSwo3tF+jrp/UEiLOgL7MPok5+Lq3Expbg== 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=AM0tHmEK; 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 9D7196071A12 for ; Tue, 3 Nov 2026 15:18:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 9D7196071A12 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=AM0tHmEK Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 830F243DE6; Tue, 3 Nov 2026 15:18:43 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D34361F00A1A; Tue, 3 Nov 2026 15:18:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793719123; bh=DuUWXqjsSRZJqvPrRnnQUK8F6HwoSKU+vf+Jc0u1BP4=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=AM0tHmEKokixtZONwfAH9GtAY9t8XyE8EQqFABZ4jT/4JvAwevkMeQijwg3GGuI6b +uRWlXfdEm1zAuo+7Xu83HaUoLhd7v44csfZ9YCQ9XFZDzwuUrIIJ5ZJSNbLwnlYGa m75nZBJXugcWf9XdVH2eCRknX8RVMsoXlE0Be3ASTz8tvYz7mmfB2q97Rx+lmFR/d/ P3y+Pk1FjoR6TzepE4sGWFDJ+B5VBr3/cihd1PQ5ptIU6mTwzqamjpHrgXtwTmDqHD SsBfs8TF14zsa35s0UdWhnaIUoaZqYvGdNLbwEdyaDdYpcyIPY7xkys8bbdug4fGgR Z1HIudLH9yC6g== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [PATCH RFC 08/23] s390/cio: let procfs copy in writes 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-drivers-v1-8-a994bd4d3b1a@kernel.org> References: <20261102-work-procfs-drivers-v1-0-a994bd4d3b1a@kernel.org> <20261102-work-procfs-drivers-v1-8-a994bd4d3b1a@kernel.org> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Tue, 03 Nov 2026 15:18:40 +0000 X-Mailing-List: linux-m68k@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list > Implement ->proc_write_buf() for cio_ignore and cio_settle so procfs > copies in what is written before it pins the entry. cio_ignore parses > the list from that copy, up to the first NUL like strncpy_from_user() > handed it to it before. Writes larger than 64k still come up short, now > through PROC_ENTRY_SHORT_WRITES. Writes to cio_settle larger than > PAGE_SIZE - 1 bytes fail with -EINVAL now, it never looked at what was > written. >=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-drivers-v1-0-a994bd4d3b1a@kernel.org?part=3D8