The patch titled
Subject: selftests/memfd: sysctl: fix MEMFD_NOEXEC_SCOPE_NOEXEC_ENFORCED
has been added to the -mm mm-unstable branch. Its filename is
selftests-memfd-sysctl-fix-memfd_noexec_scope_noexec_enforced.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/selftests-memfd-sysctl-fix-memfd_noexec_scope_noexec_enforced.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Jeff Xu <jeffxu@xxxxxxxxxx>
Subject: selftests/memfd: sysctl: fix MEMFD_NOEXEC_SCOPE_NOEXEC_ENFORCED
Date: Wed, 5 Jul 2023 06:33:15 +0000
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@xxxxxxxxxx
Reported-by: Dominique Martinet <asmadeus@xxxxxxxxxxxxx>
Closes: https://lore.kernel.org/linux-mm/CABi2SkXUX_QqTQ10Yx9bBUGpN1wByOi_=gZU6WEy5a8MaQY3Jw@xxxxxxxxxxxxxx/T/
Signed-off-by: Jeff Xu <jeffxu@xxxxxxxxxx>
Cc: Daniel Verkamp <dverkamp@xxxxxxxxxxxx>
Cc: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Jann Horn <jannh@xxxxxxxxxx>
Cc: Jorge Lucangeli Obes <jorgelo@xxxxxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: kernel test robot <lkp@xxxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
tools/testing/selftests/memfd/memfd_test.c | 5 +++++
1 file changed, 5 insertions(+)
--- a/tools/testing/selftests/memfd/memfd_test.c~selftests-memfd-sysctl-fix-memfd_noexec_scope_noexec_enforced
+++ a/tools/testing/selftests/memfd/memfd_test.c
@@ -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");
}
_
Patches currently in -mm which might be from jeffxu@xxxxxxxxxx are
mm-memfd-sysctl-fix-memfd_noexec_scope_noexec_enforced.patch
selftests-memfd-sysctl-fix-memfd_noexec_scope_noexec_enforced.patch
