linux.git/tools/testing/selftests/pidfd/pidfd.h, branch v5.8

tests: test for setns() EINVAL regression

2020-06-16T22:48:54+00:00

Verify that setns() reports EINVAL when an fd is passed that refers to an
open file but the file is not a file descriptor useable to interact with
namespaces.

Cc: Jan Stancek 
Cc: Cyril Hrubis 
Link: https://lore.kernel.org/lkml/20200615085836.GR12456@shao2-debian
Signed-off-by: Christian Brauner

selftests: add pid namespace ENOMEM regression test

2020-03-25T12:50:34+00:00

We recently regressed (cf. [1] and its corresponding fix in [2]) returning
ENOMEM when trying to create a process in a pid namespace whose init
process/child subreaper has already died. This has caused confusion at
least once before that (cf. [3]). Let's add a simple regression test to
catch this in the future.

[1]: 49cb2fc42ce4 ("fork: extend clone3() to support setting a PID")
[2]: b26ebfe12f34 ("pid: Fix error return value in some cases")
[3]: 35f71bc0a09a ("fork: report pid reservation failure properly")
Cc: Corey Minyard 
Cc: Oleg Nesterov 
Cc: Adrian Reber 
Cc: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: Andrei Vagin 
Signed-off-by: Christian Brauner

test: Add test for pidfd getfd

2020-01-13T20:49:54+00:00

The following tests:
  * Fetch FD, and then compare via kcmp
  * Make sure getfd can be blocked by blocking ptrace_may_access
  * Making sure fetching bad FDs fails
  * Make sure trying to set flags to non-zero results in an EINVAL

Signed-off-by: Sargun Dhillon 
Acked-by: Christian Brauner 
Link: https://lore.kernel.org/r/20200107175927.4558-5-sargun@sargun.me
Signed-off-by: Christian Brauner

tests: move common definitions and functions into pidfd.h

2019-08-06T17:39:45+00:00

Move definitions and functions used across different pidfd tests into
pidfd.h header.

Signed-off-by: Suren Baghdasaryan 
Reviewed-by: Christian Brauner 
Link: https://lore.kernel.org/r/20190726162226.252750-1-surenb@google.com
Signed-off-by: Christian Brauner

pidfd: add pidfd_wait tests

2019-08-06T17:39:30+00:00

Add tests for pidfd_wait() and CLONE_WAIT_PID:
- test that waitid(P_PIDFD) fails on /proc/
- test that waitid(P_PIDFD) fails on /dev/null
- test that waitid(P_PIDFD) can wait on a pidfd
- test that waitid(P_PIDFD) can wait on a pidfd and return siginfo_t
- test that waitid(P_PIDFD) works with WEXITED
- test that waitid(P_PIDFD) works with WSTOPPED
- test that waitid(P_PIDFD) works with WUNTRACED
- test that waitid(P_PIDFD) works with WCONTINUED
- test that waitid(P_PIDFD) works with WNOWAIT
- test that waitid(P_PIDFD)works with WNOHANG

Signed-off-by: Christian Brauner 
Reviewed-by: Kees Cook 
Cc: Arnd Bergmann 
Cc: "Eric W. Biederman" 
Cc: Joel Fernandes (Google) 
Cc: Thomas Gleixner 
Cc: David Howells 
Cc: Jann Horn 
Cc: Andy Lutomirsky 
Cc: Andrew Morton 
Cc: Oleg Nesterov 
Cc: Aleksa Sarai 
Cc: Linus Torvalds 
Cc: Al Viro 
Link: https://lore.kernel.org/r/20190727222229.6516-3-christian@brauner.io

tests: add pidfd_open() tests

2019-06-28T10:17:55+00:00

This adds testing for the new pidfd_open() syscalls. Specifically, we test:
- that no invalid flags can be passed to pidfd_open()
- that no invalid pid can be passed to pidfd_open()
- that a pidfd can be retrieved with pidfd_open()
- that the retrieved pidfd references the correct pid

Signed-off-by: Christian Brauner 
Cc: Arnd Bergmann 
Cc: "Eric W. Biederman" 
Cc: Kees Cook 
Cc: Joel Fernandes (Google) 
Cc: Thomas Gleixner 
Cc: Jann Horn 
Cc: David Howells 
Cc: "Michael Kerrisk (man-pages)" 
Cc: Andy Lutomirsky 
Cc: Andrew Morton 
Cc: Oleg Nesterov 
Cc: Aleksa Sarai 
Cc: Linus Torvalds 
Cc: Al Viro 
Cc: linux-api@vger.kernel.org