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selftests/memfd: sysctl: fix MEMFD_NOEXEC_SCOPE_NOEXEC_ENFORCED 

Add selftest for sysctl vm.memfd_noexec is 2
(MEMFD_NOEXEC_SCOPE_NOEXEC_ENFORCED)

memfd_create(.., MFD_EXEC) should fail in this case.

Link: https://lkml.kernel.org/r/20230705063315.3680666-3-jeffxu@google.com
Reported-by: Dominique Martinet <asmadeus@codewreck.org>
Closes: https://lore.kernel.org/linux-mm/CABi2SkXUX_QqTQ10Yx9bBUGpN1wByOi_=gZU6WEy5a8MaQY3Jw@mail.gmail.com/T/
Signed-off-by: Jeff Xu <jeffxu@google.com>
Cc: Daniel Verkamp <dverkamp@chromium.org>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Jann Horn <jannh@google.com>
Cc: Jorge Lucangeli Obes <jorgelo@chromium.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: kernel test robot <lkp@intel.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Jeff Xu 2023-07-05 06:33:15 +00:00 committed by Andrew Morton
parent 72de259130
commit badbbcd765
1 changed files with 5 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
tools/testing/selftests/memfd/memfd_test.c
View File

@ -1147,6 +1147,11 @@ static void test_sysctl_child(void)
sysctl_assert_write("2");
mfd_fail_new("kern_memfd_sysctl_2",
MFD_CLOEXEC | MFD_ALLOW_SEALING);
mfd_fail_new("kern_memfd_sysctl_2_MFD_EXEC",
MFD_CLOEXEC | MFD_EXEC);
fd = mfd_assert_new("", 0, MFD_NOEXEC_SEAL);
close(fd);
sysctl_fail_write("0");
sysctl_fail_write("1");
}