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From: Vivek Goyal <vgoyal@redhat.com>
To: Miklos Szeredi <miklos@szeredi.hu>
Cc: virtio-fs-list <virtio-fs@redhat.com>, qemu-devel@nongnu.org
Subject: Re: [Virtio-fs] [PATCH 0/2] virtiofsd: drop Linux capabilities(7)
Date: Fri, 19 Jun 2020 10:29:11 -0400	[thread overview]
Message-ID: <20200619142911.GC3154@redhat.com> (raw)
In-Reply-To: <CAJfpegsfqADmK6foDyuQQnvMDh_jE0rNUCBRuxPchSSirrb04Q@mail.gmail.com>

On Fri, Jun 19, 2020 at 04:16:30PM +0200, Miklos Szeredi wrote:
> On Thu, Jun 18, 2020 at 9:08 PM Vivek Goyal <vgoyal@redhat.com> wrote:
> >
> > On Thu, Apr 16, 2020 at 05:49:05PM +0100, Stefan Hajnoczi wrote:
> > > virtiofsd doesn't need of all Linux capabilities(7) available to root.  Keep a
> > > whitelisted set of capabilities that we require.  This improves security in
> > > case virtiofsd is compromised by making it hard for an attacker to gain further
> > > access to the system.
> >
> > Hi Stefan,
> >
> > I just noticed that this patch set breaks overlayfs on top of virtiofs.
> 
> How so?  Virtiofs isn't mounting overlayfs, is it?  Only the mounter
> requires CAP_SYS_ADMIN, not the accessor.

Are you thinking of virtiofs on top of overlayfs? I was referring to
mounting overlayfs on top of virtiofs inside VM.

Thanks
Vivek


WARNING: multiple messages have this Message-ID (diff)
From: Vivek Goyal <vgoyal@redhat.com>
To: Miklos Szeredi <miklos@szeredi.hu>
Cc: virtio-fs-list <virtio-fs@redhat.com>,
	qemu-devel@nongnu.org, Stefan Hajnoczi <stefanha@redhat.com>
Subject: Re: [Virtio-fs] [PATCH 0/2] virtiofsd: drop Linux capabilities(7)
Date: Fri, 19 Jun 2020 10:29:11 -0400	[thread overview]
Message-ID: <20200619142911.GC3154@redhat.com> (raw)
In-Reply-To: <CAJfpegsfqADmK6foDyuQQnvMDh_jE0rNUCBRuxPchSSirrb04Q@mail.gmail.com>

On Fri, Jun 19, 2020 at 04:16:30PM +0200, Miklos Szeredi wrote:
> On Thu, Jun 18, 2020 at 9:08 PM Vivek Goyal <vgoyal@redhat.com> wrote:
> >
> > On Thu, Apr 16, 2020 at 05:49:05PM +0100, Stefan Hajnoczi wrote:
> > > virtiofsd doesn't need of all Linux capabilities(7) available to root.  Keep a
> > > whitelisted set of capabilities that we require.  This improves security in
> > > case virtiofsd is compromised by making it hard for an attacker to gain further
> > > access to the system.
> >
> > Hi Stefan,
> >
> > I just noticed that this patch set breaks overlayfs on top of virtiofs.
> 
> How so?  Virtiofs isn't mounting overlayfs, is it?  Only the mounter
> requires CAP_SYS_ADMIN, not the accessor.

Are you thinking of virtiofs on top of overlayfs? I was referring to
mounting overlayfs on top of virtiofs inside VM.

Thanks
Vivek



  parent reply	other threads:[~2020-06-19 14:29 UTC|newest]

Thread overview: 71+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-16 16:49 [Virtio-fs] [PATCH 0/2] virtiofsd: drop Linux capabilities(7) Stefan Hajnoczi
2020-04-16 16:49 ` Stefan Hajnoczi
2020-04-16 16:49 ` [Virtio-fs] [PATCH 1/2] virtiofsd: only retain file system capabilities Stefan Hajnoczi
2020-04-16 16:49   ` Stefan Hajnoczi
2020-04-28 11:48   ` [Virtio-fs] " Dr. David Alan Gilbert
2020-04-28 11:48     ` Dr. David Alan Gilbert
2020-04-16 16:49 ` [Virtio-fs] [PATCH 2/2] virtiofsd: drop all capabilities in the wait parent process Stefan Hajnoczi
2020-04-16 16:49   ` Stefan Hajnoczi
2020-04-16 17:50   ` [Virtio-fs] " Philippe Mathieu-Daudé
2020-04-16 17:50     ` Philippe Mathieu-Daudé
2020-04-16 20:10 ` [Virtio-fs] [PATCH 0/2] virtiofsd: drop Linux capabilities(7) Vivek Goyal
2020-04-16 20:10   ` Vivek Goyal
2020-04-17  9:42   ` [Virtio-fs] " Stefan Hajnoczi
2020-04-17  9:42     ` Stefan Hajnoczi
2020-05-01 18:28 ` [Virtio-fs] " Dr. David Alan Gilbert
2020-05-01 18:28   ` Dr. David Alan Gilbert
2020-06-18 19:08 ` [Virtio-fs] " Vivek Goyal
2020-06-18 19:16   ` Dr. David Alan Gilbert
2020-06-18 19:16     ` Dr. David Alan Gilbert
2020-06-18 19:27     ` Vivek Goyal
2020-06-18 19:27       ` Vivek Goyal
2020-06-19  4:46       ` Chirantan Ekbote
2020-06-19  4:46         ` Chirantan Ekbote
2020-06-19  8:39         ` Dr. David Alan Gilbert
2020-06-19  9:17           ` Chirantan Ekbote
2020-06-19 11:12             ` Dr. David Alan Gilbert
2020-06-19 19:15         ` Vivek Goyal
2020-06-19 19:15           ` Vivek Goyal
2020-06-25  3:19           ` Chirantan Ekbote
2020-06-25  3:19             ` Chirantan Ekbote
2020-06-25 12:55             ` Vivek Goyal
2020-06-25 12:55               ` Vivek Goyal
2020-07-13  8:54               ` Chirantan Ekbote
2020-07-13  8:54                 ` Chirantan Ekbote
2020-07-13 13:39                 ` Vivek Goyal
2020-07-13 13:39                   ` Vivek Goyal
2020-07-13 21:39                 ` Daniel Walsh
2020-07-14 12:33                   ` Vivek Goyal
2020-07-14 17:16                     ` Daniel Walsh
2020-06-19  8:27       ` Dr. David Alan Gilbert
2020-06-19  8:27         ` Dr. David Alan Gilbert
2020-06-19 11:39         ` Daniel P. Berrangé
2020-06-19 11:39           ` Daniel P. Berrangé
2020-06-19 11:49           ` Dr. David Alan Gilbert
2020-06-19 11:49             ` Dr. David Alan Gilbert
2020-06-19 12:05             ` Daniel P. Berrangé
2020-06-19 12:05               ` Daniel P. Berrangé
2020-06-19 17:41               ` Vivek Goyal
2020-06-19 17:41                 ` Vivek Goyal
2020-06-19 19:12           ` Vivek Goyal
2020-06-19 19:12             ` Vivek Goyal
2020-06-26 11:26             ` Dr. David Alan Gilbert
2020-06-26 11:26               ` Dr. David Alan Gilbert
2020-06-19 16:09         ` Vivek Goyal
2020-06-19 16:09           ` Vivek Goyal
2020-06-19 16:16           ` Dr. David Alan Gilbert
2020-06-19 16:16             ` Dr. David Alan Gilbert
2020-06-19 17:11             ` Vivek Goyal
2020-06-19 17:11               ` Vivek Goyal
2020-06-19 17:16               ` Dr. David Alan Gilbert
2020-06-19 17:16                 ` Dr. David Alan Gilbert
2020-06-19 14:16   ` Miklos Szeredi
2020-06-19 14:16     ` Miklos Szeredi
2020-06-19 14:25     ` Vivek Goyal
2020-06-19 14:25       ` Vivek Goyal
2020-06-19 15:26       ` Miklos Szeredi
2020-06-19 15:26         ` Miklos Szeredi
2020-06-19 15:57         ` Vivek Goyal
2020-06-19 15:57           ` Vivek Goyal
2020-06-19 14:29     ` Vivek Goyal [this message]
2020-06-19 14:29       ` Vivek Goyal

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