linux-kernel - [GIT PULL] signal fixes for v5.0-rc6

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Date:   Fri, 08 Feb 2019 09:52:02 -0600
From:   ebiederm@...ssion.com (Eric W. Biederman)
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     <linux-kernel@...r.kernel.org>, Oleg Nesterov <oleg@...hat.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Jack Andersen <jackoalan@...il.com>,
        Christian Brauner <christian@...uner.io>,
        Kees Cook <keescook@...omium.org>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: [GIT PULL] signal fixes for v5.0-rc6

Linus,

Please pull the for-linus branch from the git tree:

   git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace.git for-linus

   HEAD:7146db3317c67b517258cb5e1b08af387da0618b signal: Better detection of synchronous signals

This contains 4 small fixes for signal handling.  A missing range check,
a regression fix, prioritizing signals we have already started a signal
group exit for, and better detection of synchronous signals.

The confused decision of which signals to handle failed spectacularly
when a timer was pointed at SIGBUS and the stack overflowed.  Resulting
in an unkillable process in an infinite loop instead of a SIGSEGV and
core dump.

Eric W. Biederman (4):
      signal: Make siginmask safe when passed a signal of 0
      signal: Always attempt to allocate siginfo for SIGSTOP
      signal: Always notice exiting tasks
      signal: Better detection of synchronous signals

 include/linux/signal.h |  2 +-
 kernel/signal.c        | 63 ++++++++++++++++++++++++++++++++++++++++++++++----
 2 files changed, 60 insertions(+), 5 deletions(-)

Eric