From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DE1A7C4332E for ; Sun, 22 Mar 2020 03:44:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B251A20753 for ; Sun, 22 Mar 2020 03:44:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1584848669; bh=PdGUyDr5TNiAHER+Gc7L/PkOPiHYfEpX9aUbK6v+tag=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=2X6iV9mHe0T8nQxdIBQ9cpKSNcS+ZO/Cj/hzU+gzCrCweTJcOaNHYsv49pLpuwhbw dfiCQVoIjcWr6YQ6l5K2EpYNcyunB//gI0t4lS8yTD7pR71yFbnxWo5OFvEXFHJn4u 7T05dum0EcIug0+TIUfgDfXt70oW1ciFnvmzugYE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727944AbgCVDo3 (ORCPT ); Sat, 21 Mar 2020 23:44:29 -0400 Received: from mail.kernel.org ([198.145.29.99]:49928 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727700AbgCVDo2 (ORCPT ); Sat, 21 Mar 2020 23:44:28 -0400 Received: from sol.hsd1.ca.comcast.net (c-107-3-166-239.hsd1.ca.comcast.net [107.3.166.239]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 20D9C206F9; Sun, 22 Mar 2020 03:44:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1584848668; bh=PdGUyDr5TNiAHER+Gc7L/PkOPiHYfEpX9aUbK6v+tag=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=OiPOSp6N0Bcq1WSJJK+EAhU3wTCEcSQUmP/2S2NSc0rUb8LUzjkaM4md3IE3ZFtGP Z+/+XyAgPICM9sWDDmIa/Hv28n03/b8fXM+pmduMlHff8oH02gw9VXcNpJf9RPi7vC /gq7vNobay9YJf3JSYG4H3lpVCtu8hS/t/2I8Xao= From: Eric Biggers To: Greg Kroah-Hartman , Jiri Slaby Cc: linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, syzkaller-bugs@googlegroups.com, Eric Dumazet , Nicolas Pitre Subject: [PATCH v3 0/2] vt: fix some vt_ioctl races Date: Sat, 21 Mar 2020 20:43:03 -0700 Message-Id: <20200322034305.210082-1-ebiggers@kernel.org> X-Mailer: git-send-email 2.25.2 In-Reply-To: <20200320193424.GM851@sol.localdomain> References: <20200320193424.GM851@sol.localdomain> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-serial-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-serial@vger.kernel.org Fix VT_DISALLOCATE freeing an in-use virtual console, and fix a use-after-free in vt_in_use(). Changed since v2: - Implemented tty_port_operations::destruct(). - Added comments regarding vt_in_use() locking. Changed since v1: - Made the vc_data be freed via tty_port refcounting. - Added patch to fix a use-after-free in vt_in_use(). Eric Biggers (2): vt: vt_ioctl: fix VT_DISALLOCATE freeing in-use virtual console vt: vt_ioctl: fix use-after-free in vt_in_use() drivers/tty/vt/vt.c | 23 ++++++++++++++++++++++- drivers/tty/vt/vt_ioctl.c | 28 ++++++++++++++++------------ 2 files changed, 38 insertions(+), 13 deletions(-) -- 2.25.2