Re: [CFT] Can I get some Tested-By's on this series?

[Eric W. Biederman]

Serge Hallyn <serge.hallyn@xxxxxxxxxx> writes:

> Quoting Eric W. Biederman (ebiederm@xxxxxxxxxxxx):
>> StÃphane Graber <stgraber@xxxxxxxxxx> writes:
>> 
>> > On Fri, Dec 12, 2014 at 03:38:18PM -0600, Eric W. Biederman wrote:
>> >> Serge Hallyn <serge.hallyn@xxxxxxxxxx> writes:
>> >> 
>> >> > Quoting Eric W. Biederman (ebiederm@xxxxxxxxxxxx):
>> >> >> 
>> >> >> Will people please test these patches with their container project?
>> >> >> 
>> >> >> These changes break container userspace (hopefully in a minimal way) if
>> >> >> I could have that confirmed by testing I would really appreciate it.  I
>> >> >> really don't want to send out a bug fix that accidentally breaks
>> >> >> userspace again.
>> >> >> 
>> >> >> The only issue sort of under discussion is if there is a better name for
>> >> >> /proc/<pid>/setgroups, and the name of the file will not affect the
>> >> >> functionality of the patchset.
>> >> >> 
>> >> >> With the code reviewed and written in simple obviously correct, easily
>> >> >> reviewable ways I am hoping/planning to send this to Linus ASAP.
>> >> >> 
>> >> >> Eric
>> >> >
>> >> > Is there a git tree we can clone?
>> >> 
>> >> Have either of you been able to check to see if any of my changes
>> >> affects lxc?
>> >> 
>> >> I am trying to gauge how hard and how fast I should push to Linus.  lxc
>> >> being the largest adopter of unprivileged user namespaces for general
>> >> purpose containers.
>> >> 
>> >> I expect you just call newuidmap and newgidmap and don't actually care
>> >> about not being able to set gid_map without privilege.  But I really
>> >> want to avoid pushing a security fix and then being surprised that
>> >> things like lxc break.
>> >> 
>> >> Eric
>> >
>> > Hi Eric,
>> >
>> > I've unfortunately been pretty busy this week as I was (well, still am)
>> > travelling to South Africa for a meeting. I don't have a full kernel
>> > tree around here and a full git clone isn't really doable over the kind
>> > of Internet I've got here :)
>> >
>> > Hopefully Serge can give it a quick try, otherwise I should be able to
>> > do some tests on Tuesday when I'm back home.
>> 
>> I thought Serge was going to but I haven't heard yet so I am prodding ;-)
>
> Ok, thanks - yes, unprivileged lxc is working fine with your kernels.
> Just to be sure I was testing the right thing I also tested using
> my unprivileged nsexec testcases, and they failed on setgroup/setgid
> as now expected, and succeeded there without your patches.

Thanks.

Serge unless you object will add your Tested-By to my pull message to Linus.

Minor question do you runprivileged nsexec test cases test to see if the
write to gid_map succeeds?  I would have expected the gid_map write to
fail before the setgroups setgid system calls came into play.

Eric

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/