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

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Message-ID: <87y1wnrap0.fsf_-_@email.froward.int.ebiederm.org>
Date:   Wed, 20 Jul 2022 11:49:31 -0500
From:   "Eric W. Biederman" <ebiederm@...ssion.com>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     Olivier Langlois <olivier@...llion01.com>,
        Pavel Begunkov <asml.silence@...il.com>,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        io-uring@...r.kernel.org, Alexander Viro <viro@...iv.linux.org.uk>,
        Oleg Nesterov <oleg@...hat.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: [PATCH 0/2] coredump: Allow io_uring using apps to dump to pipes.

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