The patch titled
Subject: userfaultfd/selftests: hint the test runner on required privilege
has been added to the -mm tree. Its filename is
userfaultfd-selftests-hint-the-test-runner-on-required-privilege.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/userfaultfd-selftests-hint-the-test-runner-on-required-privilege.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/userfaultfd-selftests-hint-the-test-runner-on-required-privilege.patch
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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Peter Xu <peterx@xxxxxxxxxx>
Subject: userfaultfd/selftests: hint the test runner on required privilege
Now userfaultfd test program requires either root or ptrace privilege due
to the signal/event tests. When UFFDIO_API failed, hint the test runner
about this fact verbosely.
Link: https://lkml.kernel.org/r/20201208024709.7701-4-peterx@xxxxxxxxxx
Signed-off-by: Peter Xu <peterx@xxxxxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: Mike Rapoport <rppt@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
tools/testing/selftests/vm/userfaultfd.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/tools/testing/selftests/vm/userfaultfd.c~userfaultfd-selftests-hint-the-test-runner-on-required-privilege
+++ a/tools/testing/selftests/vm/userfaultfd.c
@@ -794,7 +794,8 @@ static int userfaultfd_open(int features
uffdio_api.api = UFFD_API;
uffdio_api.features = features;
if (ioctl(uffd, UFFDIO_API, &uffdio_api)) {
- fprintf(stderr, "UFFDIO_API\n");
+ fprintf(stderr, "UFFDIO_API failed.\nPlease make sure to "
+ "run with either root or ptrace capability.\n");
return 1;
}
if (uffdio_api.api != UFFD_API) {
_
Patches currently in -mm which might be from peterx@xxxxxxxxxx are
userfaultfd-selftests-always-dump-something-in-modes.patch
userfaultfd-selftests-fix-retval-check-for-userfaultfd_open.patch
userfaultfd-selftests-hint-the-test-runner-on-required-privilege.patch
