linux-kernel - Re: [PATCH v3 06/11] kgdb: Prevent infinite recursive entries to the debugger

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: <20200430165208.7btqnsygf7kn3cso@holly.lan>
Date:   Thu, 30 Apr 2020 17:52:08 +0100
From:   Daniel Thompson <daniel.thompson@...aro.org>
To:     Douglas Anderson <dianders@...omium.org>
Cc:     jason.wessel@...driver.com, gregkh@...uxfoundation.org,
        agross@...nel.org, kgdb-bugreport@...ts.sourceforge.net,
        catalin.marinas@....com, linux-serial@...r.kernel.org,
        sumit.garg@...aro.org, corbet@....net, mingo@...hat.com,
        will@...nel.org, hpa@...or.com, tglx@...utronix.de,
        frowand.list@...il.com, bp@...en8.de, bjorn.andersson@...aro.org,
        jslaby@...e.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 06/11] kgdb: Prevent infinite recursive entries to the
 debugger

On Tue, Apr 28, 2020 at 02:13:46PM -0700, Douglas Anderson wrote:
> If we detect that we recursively entered the debugger we should hack
> our I/O ops to NULL so that the panic() in the next line won't
> actually cause another recursion into the debugger.  The first line of
> kgdb_panic() will check this and return.
> 
> Signed-off-by: Douglas Anderson <dianders@...omium.org>

Reviewed-by: Daniel Thompson <daniel.thompson@...aro.org>