linux-kernel - [PATCH 0/3] ptrace: Stop supporting SIGKILL for PTRACE_EVENT

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

Message-ID: <87r13gd4xy.fsf_-_@email.froward.int.ebiederm.org>
Date:   Wed, 22 Jun 2022 11:43:37 -0500
From:   "Eric W. Biederman" <ebiederm@...ssion.com>
To:     Oleg Nesterov <oleg@...hat.com>
Cc:     linux-kernel@...r.kernel.org, mingo@...nel.org,
        bigeasy@...utronix.de, Peter Zijlstra <peterz@...radead.org>,
        Jann Horn <jannh@...gle.com>,
        Kees Cook <keescook@...omium.org>,
        Alexander Gordeev <agordeev@...ux.ibm.com>,
        Robert O'Callahan <roc@...nos.co>, Kyle Huey <khuey@...nos.co>,
        Keno Fischer <keno@...iacomputing.com>
Subject: [PATCH 0/3] ptrace: Stop supporting SIGKILL for PTRACE_EVENT_EXIT


Recently I had a conversation where it was pointed out to me that
SIGKILL sent to a tracee stropped in PTRACE_EVENT_EXIT is quite
difficult for a tracer to handle.

Keeping SIGKILL working for anything after the process has been killed
is also a real pain from an implementation point of view.

So I am attempting to remove this wart in the userspace API and see
if anyone cares.

Eric W. Biederman (3):
      signal: Ensure SIGNAL_GROUP_EXIT gets set in do_group_exit
      signal: Guarantee that SIGNAL_GROUP_EXIT is set on process exit
      signal: Drop signals received after a fatal signal has been processed

 fs/coredump.c                |  2 +-
 include/linux/sched/signal.h |  1 +
 kernel/exit.c                | 20 +++++++++++++++++++-
 kernel/fork.c                |  2 ++
 kernel/signal.c              |  3 ++-
 5 files changed, 25 insertions(+), 3 deletions(-)

Eric