From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-f195.google.com ([209.85.192.195]:38225 "EHLO mail-pf0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754579AbeAHFiu (ORCPT ); Mon, 8 Jan 2018 00:38:50 -0500 From: Eric Biggers To: linux-fsdevel@vger.kernel.org Cc: Alexander Viro , Joe Lawrence , Michael Kerrisk , Willy Tarreau , Mikulas Patocka , "Luis R . Rodriguez" , Kees Cook , linux-kernel@vger.kernel.org, Eric Biggers Subject: [PATCH 0/7] pipe: buffer limits fixes and cleanups Date: Sun, 7 Jan 2018 21:35:35 -0800 Message-Id: <20180108053542.6472-1-ebiggers3@gmail.com> Sender: linux-fsdevel-owner@vger.kernel.org List-ID: This series simplifies the sysctl handler for pipe-max-size and fixes another set of bugs related to the pipe buffer limits: - The root user wasn't allowed to exceed the limits when creating new pipes. - There was an off-by-one error when checking the limits, so a limit of N was actually treated as N - 1. - F_SETPIPE_SZ accepted values over UINT_MAX. - Reading the pipe buffer limits could be racy. Eric Biggers (7): pipe, sysctl: drop 'min' parameter from pipe-max-size converter pipe, sysctl: remove pipe_proc_fn() pipe: actually allow root to exceed the pipe buffer limits pipe: fix off-by-one error when checking buffer limits pipe: reject F_SETPIPE_SZ with size over UINT_MAX pipe: simplify round_pipe_size() pipe: read buffer limits atomically fs/pipe.c | 58 ++++++++++++++++++++--------------------------- include/linux/pipe_fs_i.h | 5 ++-- include/linux/sysctl.h | 3 --- kernel/sysctl.c | 33 +++++---------------------- 4 files changed, 32 insertions(+), 67 deletions(-) -- 2.15.1