[GIT PULL] ucounts: Count rlimits in each user namespace

Eric W. Biederman
2021-06-28T22:35:58Z

Linus,

Please pull the for-linus branch from the git tree:

git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace.git for-linus

HEAD: 5e6b8a50a7cec5686ee2c4bda1d49899c79a7eae cred: add missing return error code when set_cred_ucounts() failed

This is the work mainly by Alexey Gladkov to limit rlimits to the
rlimits of the user that created a user namespace, and to allow users to
have stricter limits on the resources created within a user namespace.

There is a more detailed changelog from Alexey in the merge commit
9b624988221b ("ucounts: Count rlimits in each user namespace")

---

Alexey Gladkov (9):
Increase size of ucounts to atomic_long_t
Add a reference to ucounts for each cred
Use atomic_t for ucounts reference counting
Reimplement RLIMIT_NPROC on top of ucounts
Reimplement RLIMIT_MSGQUEUE on top of ucounts
Reimplement RLIMIT_SIGPENDING on top of ucounts
Reimplement RLIMIT_MEMLOCK on top of ucounts
kselftests: Add test to check for rlimit changes in different user namespaces
ucounts: Set ucount_max to the largest positive value the type can hold

Eric W. Biederman (2):
ucounts: Count rlimits in each user namespace
ucounts: Silence warning in dec_rlimit_ucounts

Yang Yingliang (1):
cred: add missing return error code when set_cred_ucounts() failed

fs/exec.c | 6 +-
fs/hugetlbfs/inode.c | 16 +-
fs/proc/array.c | 2 +-
include/linux/cred.h | 4 +
include/linux/hugetlb.h | 4 +-
include/linux/mm.h | 4 +-
include/linux/sched/user.h | 7 -
include/linux/shmem_fs.h | 2 +-
include/linux/signal_types.h | 4 +-
include/linux/user_namespace.h | 31 +++-
ipc/mqueue.c | 40 ++---
ipc/shm.c | 26 ++--
kernel/cred.c | 51 ++++++-
kernel/exit.c | 2 +-
kernel/fork.c | 18 ++-
kernel/signal.c | 25 ++--
kernel/sys.c | 14 +-
kernel/ucount.c | 116 +++++++++++----
kernel/user.c | 3 -
kernel/user_namespace.c | 9 +-
mm/memfd.c | 4 +-
mm/mlock.c | 22 ++-
mm/mmap.c | 4 +-
mm/shmem.c | 10 +-
tools/testing/selftests/Makefile | 1 +
tools/testing/selftests/rlimits/.gitignore | 2 +
tools/testing/selftests/rlimits/Makefile | 6 +
tools/testing/selftests/rlimits/config | 1 +
.../testing/selftests/rlimits/rlimits-per-userns.c | 161 +++++++++++++++++++++
29 files changed, 468 insertions(+), 127 deletions(-)