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fbb58011fd
Pull thread fix from Christian Brauner:
"This fixes a regression introduced with 303cc571d1 ("nsproxy: attach
to namespaces via pidfds").
The LTP testsuite reported a regression where users would now see
EBADF returned instead of EINVAL when an fd was passed that referred
to an open file but the file was not a namespace file.
Fix this by continuing to report EINVAL and add a regression test"
* tag 'for-linus-2020-06-24' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux:
tests: test for setns() EINVAL regression
nsproxy: restore EINVAL for non-namespace file descriptor
Linux kernel
============
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