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selftests/bpf: add tests for arena vma split and fork#8005

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selftests/bpf: add tests for arena vma split and fork#8005
kernel-patches-daemon-bpf-rc[bot] wants to merge 1 commit into
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Pull request for series with
subject: selftests/bpf: add tests for arena vma split and fork
version: 3
url: https://patchwork.kernel.org/project/netdevbpf/list/?series=1108395

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Upstream branch: 50dff00
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=1108395
version: 3

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Upstream branch: b9452b5
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=1108395
version: 3

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Upstream branch: dd0f968
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=1108395
version: 3

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Upstream branch: f1a660b
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=1108395
version: 3

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Upstream branch: 68f4e48
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=1108395
version: 3

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Upstream branch: 68f4e48
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=1108395
version: 3

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Upstream branch: c15261b
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=1108395
version: 3

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Upstream branch: 140fa23
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=1108395
version: 3

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Upstream branch: 2e8ad1f
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=1108395
version: 3

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Upstream branch: 30dee2c
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=1108395
version: 3

Add a test that an arena map's mmap()ed region cannot be split by a
partial munmap() (the "split" subtest, which expects -EINVAL) and is not
inherited across fork() (the "fork" subtest, where mincore() reports the
child's range as unmapped).

Signed-off-by: Ruslan Valiyev <linuxoid@gmail.com>
Reviewed-by: Emil Tsalapatis <emil@etsalapatis.com>
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