+ selftest-vm-test-that-mremap-fails-on-non-existent-vma.patch added to -mm tree

+ selftest-vm-test-that-mremap-fails-on-non-existent-vma.patch added to -mm tree

[Andrew Morton]

The patch titled
     Subject: selftest/vm: test that mremap fails on non-existent vma
has been added to the -mm tree.  Its filename is
     selftest-vm-test-that-mremap-fails-on-non-existent-vma.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/selftest-vm-test-that-mremap-fails-on-non-existent-vma.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/selftest-vm-test-that-mremap-fails-on-non-existent-vma.patch

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------------------------------------------------------
From: Niels Dossche <dossche.niels@gmail.com>
Subject: selftest/vm: test that mremap fails on non-existent vma

Add a regression test that validates that mremap fails for vma's that
don't exist.

Link: https://lkml.kernel.org/r/20220427224439.23828-3-dossche.niels@gmail.com
Signed-off-by: Niels Dossche <dossche.niels@gmail.com>
Cc: Mina Almasry <almasrymina@google.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 tools/testing/selftests/vm/hugepage-mremap.c |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/tools/testing/selftests/vm/hugepage-mremap.c~selftest-vm-test-that-mremap-fails-on-non-existent-vma
+++ a/tools/testing/selftests/vm/hugepage-mremap.c
@@ -178,6 +178,12 @@ int main(int argc, char *argv[])
 
 	munmap(addr, length);
 
+	addr = mremap(addr, length, length, 0);
+	if (addr != MAP_FAILED) {
+		printf("mremap: Expected failure, but call succeeded\n");
+		exit(1);
+	}
+
 	close(fd);
 	unlink(argv[argc-1]);
 
_

Patches currently in -mm which might be from dossche.niels@gmail.com are

mm-mremap-fix-sign-for-efault-error-return-value.patch
selftest-vm-test-that-mremap-fails-on-non-existent-vma.patch