From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EA2514071CA; Mon, 7 Sep 2026 06:45:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788763502; cv=none; b=CSoFunI0w5j4b9MeE6kOcrpYbsnYBiZVyQJFetHDa72i3JmQaGOALhmlEfTug+JpiA5jNXZho6PMiwZ4QsWgEZbdZ7yYtHT1FpDXpr8GXjc5w8dYRJ/JvTvz7aDRKXFJJRIKTHRP2d8XYUZFD689mM4zYE1Gopt/inRJebju5K4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788763502; c=relaxed/simple; bh=py9TLAgwbzYFwuTFBIiqUl8pkjHZ5pCK2HZtU/6UJFc=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=f9hwj5IkpCrzBMu87gK9hu2eQ4AFXPzXhxmcMVYox3EN4gSi7nT5wL31/EdLbs80fmGi/4cn2bF06McE+iIgA1RQwVJhLmkjRmmFsx4GDbKQLu4Ooi53R7HT1tbZ/TWhuj34y3AOyVFMHoJ30pNI283KbM19dsKRCUBX4s0XvR8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Tbncs/kk; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Tbncs/kk" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 974261F00A3E; Mon, 7 Sep 2026 06:45:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788763500; bh=GnL46wrTz2kWX2SmHsUS0YfqjTi6wsOs1uN7GKUqHXo=; h=From:To:Cc:Subject:Date; b=Tbncs/kk4fXS3GqV/KCQ8pxzspp0CAnJxnYKaRZlc/tQiKV17yIedELKJcPC1/CLG bC5lvcIi4edNDKW5fooqVswkfb9v8TD3ytQCtGqHQ5KED4N8Gq+dGQfdnUVj1uo6jG hVbtLJlygZlWeXFmhDAGznomMj02QScojaVsj7RW5zBdTPYj5zer/SeDW9TnmUfjLE LqztUenJoEYRjVJ40dHHPzRuDTBY5V3ltbyg3XaKa+5pbDbbgiOAbZwaU0objrNdXd sQ9qmPZIkXMb5FxHSMIUAJYpCNKW6fpKh143Lox8mFhK4jzgbvxq6kUhpkbU8PWVLG vFbcYRY/QUpKg== Received: from johan by xi.lan with local (Exim 4.99.4) (envelope-from ) id 1x3T69-00000000OC2-3aH8; Mon, 07 Sep 2026 08:44:57 +0200 From: Johan Hovold To: Greg Kroah-Hartman , Jiri Slaby Cc: linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, Johan Hovold Subject: [PATCH v3 0/4] serial: fix ioctl hangup race Date: Mon, 7 Sep 2026 08:44:14 +0200 Message-ID: <20260907064418.92953-1-johan@kernel.org> X-Mailer: git-send-email 2.55.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The tty ioctls can race with hangup and end up calling into a tty driver for a device that is already gone or powered down. Included in v3 are also two related fixes for issues highlighted by Sashiko. Johan Changes in v3 - revert guards in uart_wait_modem_status() - fix race in TIOCMIWAIT (new) - abort TIOCMIWAIT on hangup (new) Changes in v2 - include TIOCMIWAIT which also access hardware - replace broken scoped_guard() construct in wait loop Johan Hovold (4): serial: revert guards in uart_wait_modem_status() serial: fix ioctl hangup race serial: fix TIOCMIWAIT race serial: abort TIOCMIWAIT on hangup drivers/tty/serial/serial_core.c | 50 +++++++++++++++++++++++--------- 1 file changed, 37 insertions(+), 13 deletions(-) -- 2.55.0