linux-kernel - [PATCH v3 0/2] mm/ksm: add fork-exec support for prctl

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: <20230921164709.3627565-1-shr@devkernel.io>
Date:   Thu, 21 Sep 2023 09:47:07 -0700
From:   Stefan Roesch <shr@...kernel.io>
To:     kernel-team@...com
Cc:     shr@...kernel.io, akpm@...ux-foundation.org, david@...hat.com,
        hannes@...xchg.org, riel@...riel.com, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org
Subject: [PATCH v3 0/2] mm/ksm: add fork-exec support for prctl

A process can enable KSM with the prctl system call. When the process is
forked the KSM flag is inherited by the child process. However if the
process is executing an exec system call directly after the fork, the
KSM setting is cleared. This patch series addresses this problem.

1) Change the mask in coredump.h for execing a new process
2) Add a new test case in ksm_functional_tests


Changes:
- V3:
  - Combined two lines in function ksm_fork_exec_child()

- V2:
  - Removed the child program from the patch series
  - Child program is implemented by the program itself
  - Added a new command line parameter for the child program
  - Removed new section from Makefile
  - Removed duplicate ; charaters
  - Added return in if clause
  - Used PR_GET_MEMORY_MERGE instead of magic numbers
  - Resetting PR_SET_MEMROY_MERGE at the end.


Stefan Roesch (2):
  mm/ksm: support fork/exec for prctl
  mm/ksm: Test case for prctl fork/exec workflow

 include/linux/sched/coredump.h                |  7 +-
 .../selftests/mm/ksm_functional_tests.c       | 66 ++++++++++++++++++-
 2 files changed, 70 insertions(+), 3 deletions(-)


base-commit: 15bcc9730fcd7526a3b92eff105d6701767a53bb
-- 
2.39.3