selftests/bpf: Mount debugfs in setns_by_fd

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[ Upstream commit 8ac88eece8 ]

Jiri reports broken test_progs after recent commit 68f8e3d4b9
("selftests/bpf: Make sure zero-len skbs aren't redirectable").
Apparently we don't remount debugfs when we switch back networking namespace.
Let's explicitly mount /sys/kernel/debug.

0: https://lore.kernel.org/bpf/63b85917-a2ea-8e35-620c-808560910819@meta.com/T/#ma66ca9c92e99eee0a25e40f422489b26ee0171c1

Fixes: a30338840f ("selftests/bpf: Move open_netns() and close_netns() into network_helpers.c")
Reported-by: Jiri Olsa <olsajiri@gmail.com>
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Link: https://lore.kernel.org/r/20221123200829.2226254-1-sdf@google.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Stanislav Fomichev 2022-11-23 12:08:29 -08:00 • committed by Greg Kroah-Hartman

parent 4074774f55

commit e1abb71ed7

4 changed files with 7 additions and 3 deletions

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4

tools/testing/selftests/bpf/network_helpers.c

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tools/testing/selftests/bpf/prog_tests/empty_skb.c

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tools/testing/selftests/bpf/prog_tests/xdp_do_redirect.c

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2

tools/testing/selftests/bpf/prog_tests/xdp_synproxy.c

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