The patch titled
Subject: selftests/vm/pkeys: associate key on a mapped page and detect write violation
has been removed from the -mm tree. Its filename was
selftests-vm-pkeys-associate-key-on-a-mapped-page-and-detect-write-violation.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Ram Pai <linuxram@xxxxxxxxxx>
Subject: selftests/vm/pkeys: associate key on a mapped page and detect write violation
Detect write-violation on a page to which write-disabled key is associated
much after the page is mapped.
Link: http://lkml.kernel.org/r/6bfe3b3832f8bcfb07d7f2cf116b45197f4587dd.1585646528.git.sandipan@xxxxxxxxxxxxx
Signed-off-by: Ram Pai <linuxram@xxxxxxxxxx>
Acked-by: Dave Hansen <dave.hansen@xxxxxxxxx>
Signed-off-by: Sandipan Das <sandipan@xxxxxxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxx>
Cc: Florian Weimer <fweimer@xxxxxxxxxx>
Cc: "Desnes A. Nunes do Rosario" <desnesn@xxxxxxxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Thiago Jung Bauermann <bauerman@xxxxxxxxxxxxx>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Michal Suchanek <msuchanek@xxxxxxx>
Cc: Shuah Khan <shuah@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
tools/testing/selftests/vm/protection_keys.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
--- a/tools/testing/selftests/vm/protection_keys.c~selftests-vm-pkeys-associate-key-on-a-mapped-page-and-detect-write-violation
+++ a/tools/testing/selftests/vm/protection_keys.c
@@ -1002,6 +1002,17 @@ void test_read_of_access_disabled_region
expected_pkey_fault(pkey);
}
+void test_write_of_write_disabled_region_with_page_already_mapped(int *ptr,
+ u16 pkey)
+{
+ *ptr = __LINE__;
+ dprintf1("disabling write access; after accessing the page, "
+ "to PKEY[%02d], doing write\n", pkey);
+ pkey_write_deny(pkey);
+ *ptr = __LINE__;
+ expected_pkey_fault(pkey);
+}
+
void test_write_of_write_disabled_region(int *ptr, u16 pkey)
{
dprintf1("disabling write access to PKEY[%02d], doing write\n", pkey);
@@ -1410,6 +1421,7 @@ void (*pkey_tests[])(int *ptr, u16 pkey)
test_read_of_access_disabled_region,
test_read_of_access_disabled_region_with_page_already_mapped,
test_write_of_write_disabled_region,
+ test_write_of_write_disabled_region_with_page_already_mapped,
test_write_of_access_disabled_region,
test_kernel_write_of_access_disabled_region,
test_kernel_write_of_write_disabled_region,
_
Patches currently in -mm which might be from linuxram@xxxxxxxxxx are
