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Message-ID: <20200913072430.GA2965@ubuntu> Date: Sun, 13 Sep 2020 09:24:30 +0200 From: John Wood <john.wood@....com> To: Ondrej Mosnacek <omosnace@...hat.com>, Mel Gorman <mgorman@...e.de> Cc: John Wood <john.wood@....com>, James Morris <jmorris@...ei.org>, Kees Cook <keescook@...omium.org>, Kernel Hardening <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 mailing list <linux-kernel@...r.kernel.org>, linux-fsdevel@...r.kernel.org, Linux Security Module list <linux-security-module@...r.kernel.org> Subject: Re: [RESEND][RFC PATCH 0/6] Fork brute force attack mitigation (fbfam) Hi, On Sat, Sep 12, 2020 at 10:48:39PM +0200, Ondrej Mosnacek wrote: > On Sat, Sep 12, 2020 at 4:51 PM Mel Gorman <mgorman@...e.de> wrote: > > 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. Yes, it seems to be what is happening. > ...or you could keep it simple and just pass "--batch-size 1 > --relogin-delay 10" to git send-email ;) Mel and Ondrej thanks a lot for the proposed solutions. I'm sure some of your solutions will be used soon. > -- > Ondrej Mosnacek > Software Engineer, Platform Security - SELinux kernel > Red Hat, Inc. Regards, John Wood
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