linux-kernel - [PATCH RFC v2 0/4] 9p: fix open-unlink-f*syscall bug.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20200923141146.90046-1-jianyong.wu@arm.com>
Date:   Wed, 23 Sep 2020 22:11:42 +0800
From:   Jianyong Wu <jianyong.wu@....com>
To:     ericvh@...il.com, lucho@...kov.net, asmadeus@...ewreck.org,
        qemu_oss@...debyte.com
Cc:     groug@...d.org, v9fs-developer@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org, justin.he@....com,
        jianyong.wu@....com
Subject: [PATCH RFC v2 0/4] 9p: fix open-unlink-f*syscall bug.

open-unlink-f*syscall bug is well-known in 9p. We try to fix the bug
in this patch set.
I take Eric's and Greg's patches which constiute the 1/4 - 3/4 of this patch
set as the main frame of the solution. In patch 4/4, I fix the fid race issue
exists in Greg's patch.

change log:
v1 to v2:
        (1) in patch 4/4: do fid refcounter down in the clunk helper.
        (2) int patch 4/4: remove the enum value denoting from which of the
inode or dentry fids are allcated.

Eric Van Hensbergen (1):
  fs/9p: fix create-unlink-getattr idiom

Greg Kurz (1):
  fs/9p: search open fids first

Jianyong Wu (2):
  fs/9p: track open fids
  9p: fix race issue in fid contention.

 fs/9p/fid.c             | 69 ++++++++++++++++++++++++++++++++++++++---
 fs/9p/fid.h             | 11 ++++++-
 fs/9p/vfs_dentry.c      |  2 ++
 fs/9p/vfs_dir.c         |  6 +++-
 fs/9p/vfs_file.c        |  1 +
 fs/9p/vfs_inode.c       | 47 ++++++++++++++++++++++------
 fs/9p/vfs_inode_dotl.c  | 35 +++++++++++++++++----
 fs/9p/vfs_super.c       |  1 +
 fs/9p/xattr.c           | 16 ++++++++--
 include/net/9p/client.h |  7 +++++
 net/9p/client.c         | 14 ++++++---
 11 files changed, 179 insertions(+), 30 deletions(-)

-- 
2.17.1