[PATCH] fixup! kselftest: vm: add tests for memory-deny-write-execute

From: Peter Xu
Date: Wed Mar 01 2023 - 11:33:34 EST


Signed-off-by: Peter Xu <peterx@xxxxxxxxxx>
---
tools/include/uapi/linux/prctl.h | 6 ++++++
tools/testing/selftests/mm/mdwe_test.c | 3 +--
2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/tools/include/uapi/linux/prctl.h b/tools/include/uapi/linux/prctl.h
index e4c629c1f1b0..759b3f53e53f 100644
--- a/tools/include/uapi/linux/prctl.h
+++ b/tools/include/uapi/linux/prctl.h
@@ -281,6 +281,12 @@ struct prctl_mm_map {
# define PR_SME_VL_LEN_MASK 0xffff
# define PR_SME_VL_INHERIT (1 << 17) /* inherit across exec */

+/* Memory deny write / execute */
+#define PR_SET_MDWE 65
+# define PR_MDWE_REFUSE_EXEC_GAIN 1
+
+#define PR_GET_MDWE 66
+
#define PR_SET_VMA 0x53564d41
# define PR_SET_VMA_ANON_NAME 0

diff --git a/tools/testing/selftests/mm/mdwe_test.c b/tools/testing/selftests/mm/mdwe_test.c
index f466a099f1bf..bc91bef5d254 100644
--- a/tools/testing/selftests/mm/mdwe_test.c
+++ b/tools/testing/selftests/mm/mdwe_test.c
@@ -163,9 +163,8 @@ TEST_F(mdwe, mprotect_WRITE_EXEC)

TEST_F(mdwe, mmap_FIXED)
{
- void *p, *p2;
+ void *p;

- p2 = mmap(NULL, self->size, PROT_READ | PROT_EXEC, self->flags, 0, 0);
self->p = mmap(NULL, self->size, PROT_READ, self->flags, 0, 0);
ASSERT_NE(self->p, MAP_FAILED);

--
2.39.1


--+HtziZPaMlI7+HbK--