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Date: Tue, 26 Sep 2017 16:14:31 +0200
From: Salvatore Mesoraca <>
Cc: Kernel Hardening <>,
	Kees Cook <>,
	Solar Designer <>,
	Alexander Viro <>,
	"Eric W. Biederman" <>,,
	Salvatore Mesoraca <>
Subject: [RFC v2 0/2] Restrict dangerous open in sticky directories

This patch-set introduces two separate features aimed at restricting
dangerous open in world or group writable sticky directories.
The purpose is to prevent exploitable bugs in user-space programs
that don't access sticky directories in the proper way.
The first patch prevents the O_CREAT open of FIFOs and regular files
in world or group writable sticky directories if they already exists
and are owned by someone else.
The second patch prevents O_CREAT open in world or group writable
sticky when the O_EXCL flag is not set, even if the file doesn't
exist yet.
More details can be found in respective commit messages.

Salvatore Mesoraca (2):
  Protected FIFOs and regular files
  Protected O_CREAT open in sticky directory

 Documentation/sysctl/fs.txt |  66 +++++++++++++++++++++++++
 fs/namei.c                  | 118 ++++++++++++++++++++++++++++++++++++++++++--
 include/linux/fs.h          |   3 ++
 kernel/sysctl.c             |  27 ++++++++++
 4 files changed, 211 insertions(+), 3 deletions(-)


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