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Message-ID: <20200912144722.GE3117@suse.de>
Date: Sat, 12 Sep 2020 15:47:22 +0100
From: Mel Gorman <mgorman@...e.de>
To: John Wood <john.wood@....com>
Cc: James Morris <jmorris@...ei.org>, Kees Cook <keescook@...omium.org>,
	kernel-hardening@...ts.openwall.com,
	Matthew Wilcox <willy@...radead.org>,
	Jonathan Corbet <corbet@....net>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Juri Lelli <juri.lelli@...hat.com>,
	Vincent Guittot <vincent.guittot@...aro.org>,
	Dietmar Eggemann <dietmar.eggemann@....com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Ben Segall <bsegall@...gle.com>,
	Luis Chamberlain <mcgrof@...nel.org>,
	Iurii Zaikin <yzaikin@...gle.com>,
	"Serge E. Hallyn" <serge@...lyn.com>, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	linux-security-module@...r.kernel.org
Subject: Re: [RESEND][RFC PATCH 0/6] Fork brute force attack mitigation
 (fbfam)

On Sat, Sep 12, 2020 at 11:36:52AM +0200, John Wood wrote:
> On Sat, Sep 12, 2020 at 12:56:18AM -0700, Kees Cook wrote:
> > On Sat, Sep 12, 2020 at 10:03:23AM +1000, James Morris wrote:
> > > On Thu, 10 Sep 2020, Kees Cook wrote:
> > >
> > > > [kees: re-sending this series on behalf of John Wood <john.wood@....com>
> > > >  also visible at https://github.com/johwood/linux fbfam]
> > > >
> > > > From: John Wood <john.wood@....com>
> > >
> > > Why are you resending this? The author of the code needs to be able to
> > > send and receive emails directly as part of development and maintenance.
> 
> I tried to send the full patch serie by myself but my email got blocked. After
> get support from my email provider it told to me that my account is young,
> and due to its spam policie I am not allow, for now, to send a big amount
> of mails in a short period. They also informed me that soon I will be able
> to send more mails. The quantity increase with the age of the account.
> 

If you're using "git send-email" then specify --confirm=always and
either manually send a mail every few seconds or use an expect script
like

#!/bin/bash
EXPECT_SCRIPT=
function cleanup() {
	if [ "$EXPECT_SCRIPT" != "" ]; then
		rm $EXPECT_SCRIPT
	fi
}
trap cleanup EXIT

EXPECT_SCRIPT=`mktemp`
cat > $EXPECT_SCRIPT <<EOF
spawn sh ./SEND
expect {
	"Send this email"   { sleep 10; exp_send y\\r; exp_continue }
}
EOF

expect -f $EXPECT_SCRIPT
exit $?

This will work if your provider limits the rate mails are sent rather
than the total amount.

-- 
Mel Gorman
SUSE Labs

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