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[79.178.12.128]) by smtp.gmail.com with ESMTPSA id t127sm1293370qkf.43.2019.11.07.06.33.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 07 Nov 2019 06:33:52 -0800 (PST) Date: Thu, 7 Nov 2019 09:33:45 -0500 From: "Michael S. Tsirkin" To: Stefan Hajnoczi Subject: Re: [RFC v4 PATCH 49/49] multi-process: add configure and usage information Message-ID: <20191107093059-mutt-send-email-mst@kernel.org> References: <2736d12f29d2c9051966864b5d865ab0f392b8d1.1571905346.git.jag.raman@oracle.com> <20191107140220.GI365089@stefanha-x1.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191107140220.GI365089@stefanha-x1.localdomain> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: elena.ufimtseva@oracle.com, fam@euphon.net, john.g.johnson@oracle.com, qemu-devel@nongnu.org, kraxel@redhat.com, Jagannathan Raman , quintela@redhat.com, armbru@redhat.com, kanth.ghatraju@oracle.com, thuth@redhat.com, ehabkost@redhat.com, konrad.wilk@oracle.com, dgilbert@redhat.com, liran.alon@oracle.com, stefanha@redhat.com, rth@twiddle.net, kwolf@redhat.com, berrange@redhat.com, mreitz@redhat.com, ross.lagerwall@citrix.com, marcandre.lureau@gmail.com, pbonzini@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Thu, Nov 07, 2019 at 03:02:20PM +0100, Stefan Hajnoczi wrote: > This documentation suggests that QEMU spawns the remote processes. How > do this work with unprivileged QEMU? Is there an additional step where > QEMU drops privileges after having spawned remote processes? > > Remote processes require accesses to resources that the main QEMU > process does not need access to, so I'm wondering how this process model > ensures that each process has only the privileges it needs. I guess you have something like capabilities in mind? When using something like selinux, priviledges are per binary so the order of startup doesn't matter. -- MST