linux-kernel - Re: 3.15rc2 hanging processes on exit.

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: <20140422190928.GA25183@redhat.com>
Date:	Tue, 22 Apr 2014 15:09:28 -0400
From:	Dave Jones <davej@...hat.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>, Hugh Dickins <hughd@...gle.com>
Subject: Re: 3.15rc2 hanging processes on exit.

On Tue, Apr 22, 2014 at 11:57:50AM -0700, Linus Torvalds wrote:

 > Are you testing anything new? Or is this strictly new to 3.15? The
 > only thing in this area we do differently is commit cda540ace6a1 ("mm:
 > get_user_pages(write,force) refuse to COW in shared areas"), but
 > fault_in_user_writeable() never used the force bit afaik. Adding Hugh
 > just in case.

You mean new as in additions to trinity ?
The only recent chance that might be relevant is that now, when I create
struct iovec's to pass to syscalls, I populate them solely with results
from mmap's rather than a mix of mmaps and mallocs.  The mmaps could be
all kinds of sizes, types etc. [*]  So now there's more chance I guess
that an iovec contains a bunch of hugepages, or read-only pages etc.

I took another slightly longer trace of what's going on at
http://codemonkey.org.uk/junk/trace2.out
But it looks to me to be pretty similar.

	Dave

[*] https://github.com/kernelslacker/trinity/commit/1e73841971717256089d63e9f7fc33972d48028c
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/