From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AA23B606FCDD for ; Tue, 3 Nov 2026 15:18:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=kbrk31yn; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=JfXbUGlb DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Reply-To:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Date: Content-Transfer-Encoding:Content-Type:References:In-Reply-To:Cc:To:Subject: From:Message-ID:MIME-Version:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Unsubscribe-Post:List-Owner; bh=nuG+HoslXVqgC4BtSCGH4CAYwdyBqlwjqRu8aNivsSg=; b=kbrk31yn09BeNwKNCuQpKIhGcc T5VPeknG615At5HpalwmiiS5e2qjBl1L94wsQmffFUTYvxiFl2CNYWWKGxWo4/+X4lOaTTZnx6euO zdj4FGpkeAO8+BOJcoQ/soPWOhIVnv/2ptABGLOPAR3ACaUi1qKd1buS27e3donvEThUZ4oRqC7Ci xELnq8e8MkbLtaJxjNeQL3gfvmdFKxVYzAaXOGjdcvdTrDGWcvdmQmw9ebqfxnYlKBJsTsATyRsdz 3pTm9ydgR5P0wGo09eLZSnKRdPQWsIb/nKcaI5q62LQ+Z9QLWj5qtMLZV8Nud4VwIgFm9p2lYfn7/ iQypEWNg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xOGHV-00000002uvk-1DMx; Tue, 03 Nov 2026 15:18:37 +0000 Received: from sea.source.kernel.org ([172.234.252.31]) by bombadil.infradead.org with esmtps (Exim 4.100.1 #2 (Red Hat Linux)) id 1xOGHR-00000002uoy-1WWq for kexec@lists.infradead.org; Tue, 03 Nov 2026 15:18:33 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 1E52C42AB8; Tue, 3 Nov 2026 15:18:33 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 53A371F00A15; Tue, 3 Nov 2026 15:18:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793719113; bh=nuG+HoslXVqgC4BtSCGH4CAYwdyBqlwjqRu8aNivsSg=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=JfXbUGlbvISf8zKQVvmPeH7ogBauIaWPB+eTLP4FmHFU2NwqFU4DKL8ypk7Ux6mf0 gWh03iGMVC4HC0spyzQoLzUAhOUm1D8aZBt0IEBTrp1vzV/eyz2ttWkBahOXZ1jdDM bF7l8JbcCU4WdpekYFK5RkGFPYb06/MtBCIdfY5wL6E9B972eWQ4Jt8sqM73HWB744 FRmkQPByZErjf4SpqiFbdtppIJezhzfc6o4zUlNKVldgtxJJ0F2xJrpbqDKUhS9g+O aCCXO1MJqJ0Usnfho11AdOJXIk9MakMNQl6YJ71siIXnfOPILI08yBzL9lAyQ8T9HM fvUE2tPgCHfig== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [PATCH RFC 04/23] PCI/proc: let procfs copy out config space reads 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-v1-4-a994bd4d3b1a@kernel.org> References: <20261102-work-procfs-drivers-v1-0-a994bd4d3b1a@kernel.org> <20261102-work-procfs-drivers-v1-4-a994bd4d3b1a@kernel.org> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Tue, 03 Nov 2026 15:18:29 +0000 X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: sashiko-reviews@lists.linux.dev Sender: "kexec" X-Spam-Status: No, score=-10.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 X-Archived-By: > Implement ->proc_read_buf() so procfs copies what is read to userspace > after it unpinned the entry, and read the config space into procfs' > buffer with put_unaligned_le16() and put_unaligned_le32() instead of > put_user(). A read into a buffer that can't be written used to report > success. It fails with -EFAULT now. A page holds all of the config > space, so a single read of it still works, libpci treats a short read as > an error. >=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=3D4