selftests/pidfd: add pidfd setns tests

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This is basically a test-suite for setns() and as of now contains:
- test that we can't pass garbage flags
- test that we can't attach to the namespaces of  task that has already exited
- test that we can incrementally setns into all namespaces of a target task
  using a pidfd
- test that we can setns atomically into all namespaces of a target task
- test that we can't cross setns into a user namespace outside of our user
  namespace hierarchy
- test that we can't setns into namespaces owned by user namespaces over which
  we are not privileged

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Link: https://lore.kernel.org/r/20200505140432.181565-4-christian.brauner@ubuntu.com

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Christian Brauner 2020-05-05 16:04:32 +02:00

parent 303cc571d1

commit 2b40c5db73

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4 changed files with 482 additions and 1 deletions

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1

tools/testing/selftests/pidfd/.gitignore vendored

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3

tools/testing/selftests/pidfd/Makefile

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6

tools/testing/selftests/pidfd/config

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473

tools/testing/selftests/pidfd/pidfd_setns_test.c

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