From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793907338; b=Rug1S/bZJjDRoqMgSUMKB2H2ckeGf4tzFEu9SB+q3SeJp/qAAGKes45k4eqxqCKK16i6 wf8lwycd99D5EKi3cr5TggJX3mWQ0VDrYE7+LjL0R5k4Z4hzCtfE925mxi2yzWJLq6Kyk nqPPBW1MzijUscgRAKXJWGzHa+MMNbnlpqjK9yk2Qrsn5H31h0A9WspDusEE32DRr1f4+ RcgUII+vfN0O1B0m0L0G9Mrm08f7ooQygIgkdjdyLMq7Bl6QRQV0WW3jdWUNRXy3RLnqg ERsuBRS7kpV5Fl8/aA4EJJgtEC0Z3+wpBDPoDb/mmdgOn7jtBI2URq2epVMrWuqh39A== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793907338; h=Received:DKIM-Signature:Message-ID:From:Subject:Reply-To:To:Cc: In-Reply-To:References:Content-Type:Content-Transfer-Encoding:Date; bh=1DrTL1ac6XN1wKtHpceRQArmb2bB9IIZ8TJ6poNHDCM=; b=dxGPqZHbQqKIZ2fLEcaKWKeQyL59a/yZlpQXT/PpPyk2dAXLbWtyAJBihDePZYkQlN2j 8S8sKLhogcT73KDcdzTWYQO/ikjAWUeFFoNDYVVoLRYf/1KT6yUJaiiiIh7fRgzKfn5la wqpSSPfV1zq3uWZ3hLaQl5+ATDBQlX8PLGoj129qTjhfgl3AIzhItT6FhhIEziJmaowrF yGaQn3aH/aHh7XYIOEzjCAMl6Jiv6M1VSWwKJvOAxA8+o2fkKXv6uBs/Q5tH1PZnj62FJ mBLG8s4/zd4ZW6rfFuCpD1MXSBIiZNAMI/qBV4WZXnYiO6SZSYMAiQx7yrePsfJ5dMQ== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=HfWNy4Y5; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (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 EC03B60A2609; Thu, 5 Nov 2026 19:35:37 +0000 (UTC) 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=HfWNy4Y5 Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1946E1F0089E; Thu, 5 Nov 2026 19:35:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793907337; bh=1DrTL1ac6XN1wKtHpceRQArmb2bB9IIZ8TJ6poNHDCM=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=HfWNy4Y5RPfNBoKBQHLyyjYyTxbbnjJDdOqRHr0CwmBLc51x1jcm75ZAAgEad1VZu tS6QZvZfn8sUpNi6mOF5f5DFfUZLIhS4vvvi+iGswUv6KjXZx0o+EpcIZvbbxZe+4c w+eyoQ8QFIDLRMjiWYtJN8zfopCPPudrCbntig5HUXMXa/Rmrt2bn8OYImFZC4VNa2 R+83Zs+Eu4feiqusBCRRhe6e1B6nEi14J/AHyHRRYVVXAOiMjE6L8AhoiK91X8uzKE CLf8tyLGMi9vrUilCTGfT/2QMby2aoyrPQEHnvKWwCxXAzjQDLba28dyRTo132ATHY jJoKKmYLJAz8A== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [PATCH RESEND v2 11/23] selftests/proc: check that a faulting reader doesn't hold up removal 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: <20261104-work-procfs-core-v2-11-76ace653a773@kernel.org> References: <20261104-work-procfs-core-v2-0-76ace653a773@kernel.org> <20261104-work-procfs-core-v2-11-76ace653a773@kernel.org> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Thu, 05 Nov 2026 19:35:35 +0000 X-Mailing-List: linux-serial@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list > Read /proc/net/dev_snmp6/ of a tun device into a buffer whose first > page is backed by userfaultfd and remove the device while the reader > sleeps in its copy to userspace: >=20 > - removing the entry doesn't wait for the reader >=20 > - the reader still gets what was printed before the removal >=20 > - and the next read fails with -EIO >=20 > The entry is removed under RTNL, so a regression stalls the test for > five seconds before it fails. >=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/20261104-work-procf= s-core-v2-0-76ace653a773@kernel.org?part=3D11