From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
To: Vivek Goyal <vgoyal@redhat.com>
Cc: berrange@redhat.com, vromanso@redhat.com, dwalsh@redhat.com,
qemu-devel@nongnu.org, virtio-fs@redhat.com, stefanha@redhat.com
Subject: Re: [PATCH v2 5/5] virtiofsd: Skip setup_capabilities() in sandbox=NONE mode
Date: Fri, 7 Aug 2020 18:58:39 +0100 [thread overview]
Message-ID: <20200807175839.GK2780@work-vm> (raw)
In-Reply-To: <20200730194736.173994-6-vgoyal@redhat.com>
* Vivek Goyal (vgoyal@redhat.com) wrote:
> setup_capabilites() tries to give some of the required capabilities
> to act as a full fledged file server in priviliged mode. In unpriviliged
> mode we can't get those capabilities and setup_capabilities() will fail.
>
> So don't setup capabilities when sandbox=NONE.
>
> Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
> ---
> tools/virtiofsd/passthrough_ll.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/tools/virtiofsd/passthrough_ll.c b/tools/virtiofsd/passthrough_ll.c
> index a6fa816b6c..1a0b24cbf2 100644
> --- a/tools/virtiofsd/passthrough_ll.c
> +++ b/tools/virtiofsd/passthrough_ll.c
> @@ -3030,7 +3030,8 @@ static void setup_sandbox(struct lo_data *lo, struct fuse_session *se,
> }
>
> setup_seccomp(enable_syslog);
> - setup_capabilities(g_strdup(lo->modcaps));
> + if (lo->sandbox != SANDBOX_NONE)
> + setup_capabilities(g_strdup(lo->modcaps));
> }
I'd rather keep capabilities and sandboxing separate.
Since I already added modcaps= how about just letting that
take a varient as '-o modcaps=keep'
Dave
> /* Set the maximum number of open file descriptors */
> --
> 2.25.4
>
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
next prev parent reply other threads:[~2020-08-07 17:59 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-30 19:47 [PATCH v2 0/5] virtiofsd: Add a unprivileged passthrough mode Vivek Goyal
2020-07-30 19:47 ` [PATCH v2 1/5] virtiofsd: Add notion of unprivileged mode Vivek Goyal
2020-08-07 16:33 ` Dr. David Alan Gilbert
2020-07-30 19:47 ` [PATCH v2 2/5] virtiofsd: create lock/pid file in per user cache dir Vivek Goyal
2020-08-07 17:34 ` Dr. David Alan Gilbert
2020-07-30 19:47 ` [PATCH v2 3/5] virtiofsd: open /proc/self/fd/ in sandbox=NONE mode Vivek Goyal
2020-08-07 17:42 ` Dr. David Alan Gilbert
2020-07-30 19:47 ` [PATCH v2 4/5] virtiofsd: Open lo->source while setting up root " Vivek Goyal
2020-08-03 9:54 ` Stefan Hajnoczi
2020-08-03 13:57 ` Vivek Goyal
2020-08-04 10:36 ` Stefan Hajnoczi
2020-07-30 19:47 ` [PATCH v2 5/5] virtiofsd: Skip setup_capabilities() " Vivek Goyal
2020-08-07 17:58 ` Dr. David Alan Gilbert [this message]
2020-08-03 9:45 ` [PATCH v2 0/5] virtiofsd: Add a unprivileged passthrough mode Stefan Hajnoczi
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