On Tue, Aug 11, 2015 at 11:57 AM, Eric W. Biederman
<ebiederm@xxxxxxxxxxxx> wrote:
> Tejun Heo <tj@xxxxxxxxxx> writes:
>
>> On Thu, May 14, 2015 at 12:36:30PM -0500, Eric W. Biederman wrote:
>>>
>>> This allows for better documentation in the code and
>>> it allows for a simpler and fully correct version of
>>> fs_fully_visible to be written.
>>>
>>> The mount points converted and their filesystems are:
>>> /sys/hypervisor/s390/ s390_hypfs
>>> /sys/kernel/config/ configfs
>>> /sys/kernel/debug/ debugfs
>>> /sys/firmware/efi/efivars/ efivarfs
>>> /sys/fs/fuse/connections/ fusectl
>>> /sys/fs/pstore/ pstore
>>> /sys/kernel/tracing/ tracefs
>>> /sys/fs/cgroup/ cgroup
>>> /sys/kernel/security/ securityfs
>>> /sys/fs/selinux/ selinuxfs
>>> /sys/fs/smackfs/ smackfs
>>>
>>> Cc: stable@xxxxxxxxxxxxxxx
>>> Signed-off-by: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
>>
>> So, this somehow ends up confusing upstart on centos6 based systems
>> making it fail to mount tmpfs on /sys/fs/cgroup. It also skips sunrpc
>> and other mounts are different too. No idea why at this point. Can
>> we please revert this from -stable until we know what's going on?
>
> *Boggle*
>
> The only time this should prevent anything is when in a container when
> you are not global root. And then only mounting sysfs should be
> affected.
Before:
open("/sys/kernel/debug/asdf", O_WRONLY|O_CREAT|O_NOCTTY|O_NONBLOCK,
0666) = -1 EACCES (Permission denied)
After:
open("/sys/kernel/debug/asdf", O_WRONLY|O_CREAT|O_NOCTTY|O_NONBLOCK,
0666) = -1 ENOENT (No such file or directory)
Something broke. I don't know whether CentOS cares about that change,
but there could be other odd side effects.
--Andy
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