[GIT PULL] userns
From: Eric W. Biederman
Date: Sun Jun 03 2018 - 23:45:14 EST
Please pull the userns-linus branch from the git tree:
HEAD: f3f1a18330ac1b717cd7a32adff38d965f365aa2 fs: Allow CAP_SYS_ADMIN in s_user_ns to freeze and thaw filesystems
This is the last couple of vfs bits to enable root in a user namespace
to mount and manipulate a filesystem with backing store (AKA not a
virtual filesystem like proc, but a filesystem where the unprivileged
user controls the content). The target filesystem for this work
is fuse, and Miklos should be sending you the pull request for the
fuse bits this merge window.
The two key patches are " evm: Don't update hmacs in user ns mounts" and
"vfs: Don't allow changing the link count of an inode with an invalid
uid or gid". Those close small gaps in the vfs that would be a problem
if an unprivileged fuse filesystem is mounted.
The rest of the changes are things that are now safe to allow a root
user in a user namespace to do with a filesystem they have mounted. The
most interesting development is that remount is now safe.
Eric W. Biederman (5):
vfs: Don't allow changing the link count of an inode with an invalid uid or gid
vfs: Allow userns root to call mknod on owned filesystems.
fs: Allow superblock owner to replace invalid owners of inodes
fs: Allow superblock owner to access do_remount_sb()
capabilities: Allow privileged user in s_user_ns to set security.* xattrs
Seth Forshee (2):
evm: Don't update hmacs in user ns mounts
fs: Allow CAP_SYS_ADMIN in s_user_ns to freeze and thaw filesystems