[PATCH 0/2] coredump: Allow io_uring using apps to dump to pipes.

From: "Eric W. Biederman" <ebiederm@xmission.com>
To: Jens Axboe <axboe@kernel.dk>
Cc: Olivier Langlois <olivier@trillion01.com>,
	Pavel Begunkov <asml.silence@gmail.com>,
	linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	io-uring@vger.kernel.org,
	Alexander Viro <viro@zeniv.linux.org.uk>,
	Oleg Nesterov <oleg@redhat.com>,
	Linus Torvalds <torvalds@linux-foundation.org>
Subject: [PATCH 0/2] coredump: Allow io_uring using apps to dump to pipes.
Date: Wed, 20 Jul 2022 11:49:31 -0500	[thread overview]
Message-ID: <87y1wnrap0.fsf_-_@email.froward.int.ebiederm.org> (raw)
In-Reply-To: <a29a1649-5e50-4221-9f44-66a35fbdff80@kernel.dk> (Jens Axboe's message of "Tue, 31 May 2022 21:15:57 -0600")

Folks who have been suffering from io_uring coredumping issues please
give this a spin.  I have lightly tested this version and more heavily
tested an earlier version which had more dependencies.

Unless I have missed something in cleaning up the code this should
be a comprehensive fix to the coredumping issues when using io_uring.

But folks please test and verify this.  It has taken me long enough to
get back to this point I don't properly remember how the reproducer I
have was supposed to fail.  All I can say with certainty is set of
changes has what looks like a positive effect.

Eric W. Biederman (2):
      signal: Move stopping for the coredump from do_exit into get_signal
      coredump: Allow coredumps to pipes to work with io_uring

 fs/coredump.c            | 30 ++++++++++++++++++++++++++++--
 include/linux/coredump.h |  2 ++
 kernel/exit.c            | 29 +++++------------------------
 kernel/signal.c          |  5 +++++
 mm/oom_kill.c            |  2 +-
 5 files changed, 41 insertions(+), 27 deletions(-)

Eric