FUSE exports' allow-other option defaults to "auto", which means that it
will try passing allow_other as a mount option, and fall back to not
using it when an error occurs.  We make no effort to hide fusermount's
error message (because it would be difficult, and because users might
want to know about the fallback occurring), and so when allow_other does
not work (primarily when /etc/fuse.conf does not contain
user_allow_other), this error message will appear and break the
reference output.

We do not need allow_other here, though, so we can just pass
allow-other=off to fix that.

Reported-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Hanna Reitz <hreitz@redhat.com>
---
 tests/qemu-iotests/108 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/qemu-iotests/108 b/tests/qemu-iotests/108
index 688d3ae8f6..9e923d6a59 100755
--- a/tests/qemu-iotests/108
+++ b/tests/qemu-iotests/108
@@ -326,7 +326,7 @@ else
 
     $QSD \
         --blockdev file,node-name=export-node,filename="$TEST_IMG" \
-        --export fuse,id=fuse-export,node-name=export-node,mountpoint="$export_mp",writable=on,growable=off \
+        --export fuse,id=fuse-export,node-name=export-node,mountpoint="$export_mp",writable=on,growable=off,allow-other=off \
         --pidfile "$TEST_DIR/qsd.pid" \
         --daemonize
 fi
-- 
2.35.1

On Thu, Apr 21, 2022 at 04:24:35PM +0200, Hanna Reitz wrote:
> FUSE exports' allow-other option defaults to "auto", which means that it
> will try passing allow_other as a mount option, and fall back to not
> using it when an error occurs.  We make no effort to hide fusermount's
> error message (because it would be difficult, and because users might
> want to know about the fallback occurring), and so when allow_other does
> not work (primarily when /etc/fuse.conf does not contain
> user_allow_other), this error message will appear and break the
> reference output.
> 
> We do not need allow_other here, though, so we can just pass
> allow-other=off to fix that.
> 
> Reported-by: Markus Armbruster <armbru@redhat.com>
> Signed-off-by: Hanna Reitz <hreitz@redhat.com>
> ---
>  tests/qemu-iotests/108 | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

I hit this today as well, and your fix works.

Tested-by: Eric Blake <eblake@redhat.com>

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org

Hanna Reitz <hreitz@redhat.com> writes:

> FUSE exports' allow-other option defaults to "auto", which means that it
> will try passing allow_other as a mount option, and fall back to not
> using it when an error occurs.  We make no effort to hide fusermount's
> error message (because it would be difficult, and because users might
> want to know about the fallback occurring), and so when allow_other does
> not work (primarily when /etc/fuse.conf does not contain
> user_allow_other), this error message will appear and break the
> reference output.
>
> We do not need allow_other here, though, so we can just pass
> allow-other=off to fix that.
>
> Reported-by: Markus Armbruster <armbru@redhat.com>
> Signed-off-by: Hanna Reitz <hreitz@redhat.com>

Tested-by: Markus Armbruster <armbru@redhat.com>

Thanks!