linux/tools/testing/selftests/pidfd, branch v5.7

Merge tag 'threads-v5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux

2020-04-04T17:08:18Z

Pull thread updates from Christian Brauner: "The main change for this cycle was the extension for clone3() to support spawning processes directly into cgroups via CLONE_INTO_CGROUP (commit ef2c41cf38a7: "clone3: allow spawning processes into cgroups"). But since I had to touch kernel/cgroup/ quite a bit I had Tejun route that through his tree this time around to make it easier for him to handle other changes. So here is just the unexciting leftovers: a regression test for the ENOMEM regression we fixed in commit b26ebfe12f34 ("pid: Fix error return value in some cases") verifying that we report ENOMEM when trying to create a new process in a pid namespace whose init process/subreaper has already exited" * tag 'threads-v5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux: selftests: add pid namespace ENOMEM regression test

selftests: add pid namespace ENOMEM regression test

2020-03-25T12:50:34Z

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

.gitignore: add SPDX License Identifier

2020-03-25T10:50:48Z

Add SPDX License Identifier to all .gitignore files. Signed-off-by: Masahiro Yamada Signed-off-by: Greg Kroah-Hartman

selftests: pidfd: Add pidfd_fdinfo_test in .gitignore

2020-02-28T12:35:05Z

The commit identified below added pidfd_fdinfo_test but failed to add it to .gitignore Fixes: 2def297ec7fb ("pidfd: add tests for NSpid info in fdinfo") Signed-off-by: Christophe Leroy Acked-by: Christian Brauner Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/966567c7dbaa26a06730d796354f8a086c0ee288.1582847778.git.christophe.leroy@c-s.fr Signed-off-by: Christian Brauner

test: Add test for pidfd getfd

2020-01-13T20:49:54Z

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

test: verify fdinfo for pidfd of reaped process

2019-10-17T13:36:54Z

Test that the fdinfo field of a pidfd referring to a dead process correctly shows Pid: -1 and NSpid: -1. Cc: Christian Kellner Cc: linux-kselftest@vger.kernel.org Reviewed-by: Christian Kellner Signed-off-by: Christian Brauner Link: https://lore.kernel.org/r/20191017101832.5985-2-christian.brauner@ubuntu.com

pidfd: add tests for NSpid info in fdinfo

2019-10-15T10:17:11Z

Add a test that checks that if pid namespaces are configured the fdinfo file of a pidfd contains an NSpid: entry containing the process id in the current and additionally all nested namespaces. In the case that a pidfd is from a pid namespace not in the same namespace hierarchy as the process accessing the fdinfo file, ensure the 'NSpid' shows 0 for that pidfd, analogous to the 'Pid' entry. Signed-off-by: Christian Kellner Acked-by: Christian Brauner Link: https://lore.kernel.org/r/20191014162034.2185-2-ckellner@redhat.com Signed-off-by: Christian Brauner

selftests: pidfd: Fix undefined reference to pthread_create()

2019-09-30T20:32:55Z

Fix build failure: undefined reference to `pthread_create' collect2: error: ld returned 1 exit status Fix CFLAGS to include pthread correctly. Fixes: 740378dc7834 ("pidfd: add polling selftests") Signed-off-by: Shuah Khan Reviewed-by: Christian Brauner Cc: Link: https://lore.kernel.org/r/20190924195237.30519-1-skhan@linuxfoundation.org Signed-off-by: Christian Brauner

Merge tag 'core-process-v5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux

2019-09-16T16:28:19Z

Pull pidfd/waitid updates from Christian Brauner: "This contains two features and various tests. First, it adds support for waiting on process through pidfds by adding the P_PIDFD type to the waitid() syscall. This completes the basic functionality of the pidfd api (cf. [1]). In the meantime we also have a new adition to the userspace projects that make use of the pidfd api. The qt project was nice enough to send a mail pointing out that they have a pr up to switch to the pidfd api (cf. [2]). Second, this tag contains an extension to the waitid() syscall to make it possible to wait on the current process group in a race free manner (even though the actual problem is very unlikely) by specifing 0 together with the P_PGID type. This extension traces back to a discussion on the glibc development mailing list. There are also a range of tests for the features above. Additionally, the test-suite which detected the pidfd-polling race we fixed in [3] is included in this tag" [1] https://lwn.net/Articles/794707/ [2] https://codereview.qt-project.org/c/qt/qtbase/+/108456 [3] commit b191d6491be6 ("pidfd: fix a poll race when setting exit_state") * tag 'core-process-v5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux: waitid: Add support for waiting for the current process group tests: add pidfd poll tests tests: move common definitions and functions into pidfd.h pidfd: add pidfd_wait tests pidfd: add P_PIDFD to waitid()

tests: add pidfd poll tests

2019-08-06T17:52:41Z

This adds testing for polling on pidfd of a process being killed. Test runs 10000 iterations by default to stress test pidfd polling functionality. It accepts an optional command-line parameter to override the number or iterations to run. Specifically, it tests for: - pidfd_open on a child process succeeds - pidfd_send_signal on a child process succeeds - polling on pidfd succeeds and returns exactly one event - returned event is POLLIN - event is received within 3 secs of the process being killed 10000 iterations was chosen because of the race condition being tested which is not consistently reproducible but usually is revealed after less than 2000 iterations. Reveals race fixed by commit b191d6491be6 ("pidfd: fix a poll race when setting exit_state") Signed-off-by: Suren Baghdasaryan Link: https://lore.kernel.org/r/20190726162226.252750-2-surenb@google.com Signed-off-by: Christian Brauner