From: "Jürgen Groß" <jgross@suse.com>
To: Jan Beulich <jbeulich@suse.com>,
"xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>
Cc: Stefano Stabellini <sstabellini@kernel.org>,
Julien Grall <julien@xen.org>, Wei Liu <wl@xen.org>,
Konrad Wilk <konrad.wilk@oracle.com>,
George Dunlap <George.Dunlap@eu.citrix.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
Ilja Van Sprundel <ivansprundel@ioactive.com>,
Ian Jackson <ian.jackson@citrix.com>
Subject: Re: [Xen-devel] [PATCH] console: avoid buffer overflow in guest_console_write()
Date: Fri, 29 Nov 2019 13:02:57 +0100 [thread overview]
Message-ID: <99d9e737-53be-7add-cb5c-b29bd674459d@suse.com> (raw)
In-Reply-To: <5766dd2b-2aa7-bafe-56ad-3ea33ddf4591@suse.com>
On 29.11.19 11:13, Jan Beulich wrote:
> The switch of guest_console_write()'s second parameter from plain to
> unsigned int has caused the function's main loop header to no longer
> guard the min_t() use within the function against effectively negative
> values, due to the casts hidden inside the macro. Replace by a plain
> min(), converting one of the arguments suitably without involving any
> cast.
>
> Fixes: ea601ec9995b ("xen/console: Rework HYPERCALL_console_io interface")
> Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com>
> Signed-off-by: Jan Beulich <jbeulich@suse.com>
Release-acked-by: Juergen Gross <jgross@suse.com>
Juergen
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next prev parent reply other threads:[~2019-11-29 12:03 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-29 10:13 [Xen-devel] [PATCH] console: avoid buffer overflow in guest_console_write() Jan Beulich
2019-11-29 10:22 ` Andrew Cooper
2019-11-29 10:27 ` Jan Beulich
2019-11-29 12:01 ` Ian Jackson
2019-11-29 12:04 ` Andrew Cooper
2019-11-29 12:13 ` Jan Beulich
2019-11-29 12:15 ` Andrew Cooper
2019-11-29 12:19 ` Jan Beulich
2019-11-29 12:37 ` Andrew Cooper
2019-11-29 13:26 ` Jan Beulich
2019-11-29 13:37 ` Jürgen Groß
2019-11-29 13:55 ` Jan Beulich
2019-11-29 13:57 ` Andrew Cooper
2019-11-29 13:57 ` Jürgen Groß
2019-11-29 10:39 ` Julien Grall
2019-11-29 11:59 ` Ian Jackson
2019-11-29 12:15 ` Jan Beulich
2019-11-29 12:17 ` Andrew Cooper
2019-11-29 12:02 ` Jürgen Groß [this message]
2019-11-29 14:35 ` [Xen-devel] [PATCH XTF] CONSOLEIO_write stack overflow PoC Andrew Cooper
2019-11-29 14:43 ` Jan Beulich
2019-11-29 14:45 ` Jan Beulich
2019-11-29 14:50 ` Andrew Cooper
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