cgroup/systemd func systemdProperties sets wrong char entry.Path

[yangfeiyu20102011]

case devices.CharDevice: 
entry.Path = fmt.Sprintf("/dev/char/%d:%d", rule.Major, rule.Minor)

This may set wrong char entry.Path when comes with NVIDIA devices, and it will set
DeviceAllow=/dev/char/195:0 rw in systemd DeviceAllow.conf. It will not work.

[yangfeiyu20102011]

#3568 will fix it.

[kolyshkin]

Duplicate of #3671

[kolyshkin]

OK this is not a duplicate but a different issue.

This was fixed in system v240, if you're using an earlier version, there is nothing you can do about it.

I also heard that nvidia is going to fix it in their drivers, so that the proper /dev/... nodes will be created (which will help with older systemd).

[kolyshkin]

For some details about why systemd v240 is needed, see the description of #3842

So, there's nothing we can do when older systemd is used, and in case systemd is >= v240, you either need runc < 1.1.3 or >= 1.1.7 (not yet released), or the one built from the main branch (after merging #3842).