From: Paolo Bonzini <pbonzini@redhat.com>
To: P J P <ppandit@redhat.com>
Cc: Fam Zheng <fam@euphon.net>, Bugs SysSec <bugs-syssec@rub.de>,
QEMU Developers <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] [PATCH] scsi: lsi: exit infinite loop while executing script (CVE-2019-12068)
Date: Thu, 8 Aug 2019 12:42:14 +0200 [thread overview]
Message-ID: <f9fa36c5-0ee0-d2d2-c8e4-95c887b9b647@redhat.com> (raw)
In-Reply-To: <nycvar.YSQ.7.76.1908081510580.30966@xnncv>
On 08/08/19 11:48, P J P wrote:
> +-- On Thu, 8 Aug 2019, Paolo Bonzini wrote --+
> | I am not sure this is worth a CVE.
>
> True, it is a low one, as QEMU consumes cycles on the host.
A guest that runs an infinite loop would be an easier way to do that. I
suppose this one also blocks the monitor, but then "kill -9" is always
your friend. :)
Paolo
> | The kernel can cause QEMU to break, but is there a practical case in which
> | an unprivileged user can do that?
>
> QEMU does not break, it keeps running in interruptible sleep 'S' state.
> They've a reproducer wherein guest does mmio calls to trigger the issue.
next prev parent reply other threads:[~2019-08-08 10:42 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-08 6:33 [Qemu-devel] [PATCH] scsi: lsi: exit infinite loop while executing script (CVE-2019-12068) P J P
2019-08-08 8:20 ` Stefano Garzarella
2019-08-08 9:35 ` P J P
2019-08-08 9:11 ` Paolo Bonzini
2019-08-08 9:48 ` P J P
2019-08-08 10:29 ` Philippe Mathieu-Daudé
2019-08-08 11:02 ` P J P
2019-08-08 10:42 ` Paolo Bonzini [this message]
2019-08-08 11:04 ` P J P
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