kernel.git/tools/testing/selftests/memfd/memfd_test.c, branch linux-6.3.y

selftests/memfd: add tests for MFD_NOEXEC_SEAL MFD_EXEC

2023-01-19T01:12:37Z

Tests to verify MFD_NOEXEC, MFD_EXEC and vm.memfd_noexec sysctl. Link: https://lkml.kernel.org/r/20221215001205.51969-6-jeffxu@google.com Signed-off-by: Jeff Xu Co-developed-by: Daniel Verkamp Signed-off-by: Daniel Verkamp Reviewed-by: Kees Cook Cc: David Herrmann Cc: Dmitry Torokhov Cc: Hugh Dickins Cc: Jann Horn Cc: Jorge Lucangeli Obes Cc: kernel test robot Cc: Shuah Khan Signed-off-by: Andrew Morton

selftests/memfd: add tests for F_SEAL_EXEC

2023-01-19T01:12:37Z

Basic tests to ensure that user/group/other execute bits cannot be changed after applying F_SEAL_EXEC to a memfd. Link: https://lkml.kernel.org/r/20221215001205.51969-3-jeffxu@google.com Signed-off-by: Daniel Verkamp Co-developed-by: Jeff Xu Signed-off-by: Jeff Xu Reviewed-by: Kees Cook Cc: David Herrmann Cc: Dmitry Torokhov Cc: Hugh Dickins Cc: Jann Horn Cc: Jorge Lucangeli Obes Cc: kernel test robot Cc: Shuah Khan Signed-off-by: Andrew Morton

selftests/memfd: clean up mapping in mfd_fail_write

2022-02-26T17:51:17Z

Running the memfd script ./run_hugetlbfs_test.sh will often end in error as follows: memfd-hugetlb: CREATE memfd-hugetlb: BASIC memfd-hugetlb: SEAL-WRITE memfd-hugetlb: SEAL-FUTURE-WRITE memfd-hugetlb: SEAL-SHRINK fallocate(ALLOC) failed: No space left on device ./run_hugetlbfs_test.sh: line 60: 166855 Aborted (core dumped) ./memfd_test hugetlbfs opening: ./mnt/memfd fuse: DONE If no hugetlb pages have been preallocated, run_hugetlbfs_test.sh will allocate 'just enough' pages to run the test. In the SEAL-FUTURE-WRITE test the mfd_fail_write routine maps the file, but does not unmap. As a result, two hugetlb pages remain reserved for the mapping. When the fallocate call in the SEAL-SHRINK test attempts allocate all hugetlb pages, it is short by the two reserved pages. Fix by making sure to unmap in mfd_fail_write. Link: https://lkml.kernel.org/r/20220219004340.56478-1-mike.kravetz@oracle.com Signed-off-by: Mike Kravetz Cc: Joel Fernandes Cc: Shuah Khan Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

selftests/memfd: remove unused variable

2021-09-08T18:50:28Z

Commit 544029862cbb ("selftests/memfd: add tests for F_SEAL_FUTURE_WRITE seal") added an unused variable to mfd_assert_reopen_fd(). Delete the unused variable. Link: https://lkml.kernel.org/r/20210702045509.1517643-1-gthelen@google.com Fixes: 544029862cbb ("selftests/memfd: add tests for F_SEAL_FUTURE_WRITE seal") Signed-off-by: Greg Thelen Cc: Shuah Khan Cc: Michael Ellerman Cc: "Joel Fernandes (Google)" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

selftests/memfd: Fix implicit declaration warnings

2020-11-10T21:42:04Z

The memfd tests emit several warnings: fuse_test.c:261:7: warning: implicit declaration of function 'open' fuse_test.c:67:6: warning: implicit declaration of function 'fcntl' memfd_test.c:397:6: warning: implicit declaration of function 'fallocate' memfd_test.c:64:7: warning: implicit declaration of function 'open' memfd_test.c:90:6: warning: implicit declaration of function 'fcntl' These are all caused by the test not including fcntl.h. Instead of including linux/fcntl.h, include fcntl.h, which should eventually cause the former to be included as well. Signed-off-by: Michael Ellerman Signed-off-by: Shuah Khan

memfd: add test for COW on MAP_PRIVATE and F_SEAL_FUTURE_WRITE mappings

2019-12-01T20:59:03Z

In this test, the parent and child both have writable private mappings. The test shows that without the patch in this series, the parent and child shared the same memory which is incorrect. In other words, COW needs to be triggered so any writes to child's copy stays local to the child. Link: http://lkml.kernel.org/r/20191107195355.80608-2-joel@joelfernandes.org Signed-off-by: Joel Fernandes (Google) Cc: Hugh Dickins Cc: Nicolas Geoffray Cc: Shuah Khan Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

selftests/memfd: add tests for F_SEAL_FUTURE_WRITE seal

2019-03-06T05:07:19Z

Add tests to verify sealing memfds with the F_SEAL_FUTURE_WRITE works as expected. Link: http://lkml.kernel.org/r/20190112203816.85534-3-joel@joelfernandes.org Signed-off-by: Joel Fernandes (Google) Reviewed-by: Shuah Khan Cc: Al Viro Cc: Andy Lutomirski Cc: Hugh Dickins Cc: Jann Horn Cc: J. Bruce Fields Cc: Jeff Layton Cc: John Stultz Cc: Marc-Andr Lureau Cc: Matthew Wilcox Cc: Mike Kravetz Cc: Minchan Kim Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

memfd-test: move common code to a shared unit

2018-02-01T01:18:39Z

The memfd & fuse tests will share more common code in the following commits to test hugetlb support. Link: http://lkml.kernel.org/r/20171107122800.25517-9-marcandre.lureau@redhat.com Signed-off-by: Marc-André Lureau Reviewed-by: Mike Kravetz Cc: Andrea Arcangeli Cc: Hugh Dickins Cc: Michal Hocko Cc: David Herrmann Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

memfd-test: add 'memfd-hugetlb:' prefix when testing hugetlbfs

2018-02-01T01:18:39Z

Link: http://lkml.kernel.org/r/20171107122800.25517-8-marcandre.lureau@redhat.com Suggested-by: Mike Kravetz Signed-off-by: Marc-André Lureau Reviewed-by: Mike Kravetz Cc: Andrea Arcangeli Cc: Hugh Dickins Cc: Michal Hocko Cc: David Herrmann Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

memfd-test: test hugetlbfs sealing

2018-02-01T01:18:39Z

Remove most of the special-casing of hugetlbfs now that sealing is supported. Link: http://lkml.kernel.org/r/20171107122800.25517-7-marcandre.lureau@redhat.com Signed-off-by: Marc-André Lureau Reviewed-by: Mike Kravetz Cc: Andrea Arcangeli Cc: Hugh Dickins Cc: Michal Hocko Cc: David Herrmann Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds