tools/testing/selftests: add mremap() unfaulted/faulted test cases

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Assert that mremap() behaviour is as expected when moving around unfaulted
VMAs immediately adjacent to faulted ones, as well as moving around
faulted VMAs and placing them back immediately adjacent to the VMA from
which they were moved.

This also introduces a shared helper for the syscall version of mremap()
so we don't encounter any issues with libc filtering parameters.

Link: https://lkml.kernel.org/r/20250702084717.21360-1-lorenzo.stoakes@oracle.com
Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Jann Horn <jannh@google.com>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

...

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Lorenzo Stoakes 2025-07-02 09:47:17 +01:00 • committed by Andrew Morton

parent 526f36f3f4

commit 4e25f85b9f

3 changed files with 608 additions and 2 deletions

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599

tools/testing/selftests/mm/merge.c

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8

tools/testing/selftests/mm/vm_util.c

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3

tools/testing/selftests/mm/vm_util.h

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