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Thu, 5 Nov 2026 19:35:37 +0000 (UTC) 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-m68k@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