The patch titled
Subject: selftests/mm: remove X permission from sigaltstack mapping
has been added to the -mm mm-unstable branch. Its filename is
selftests-mm-remove-x-permission-from-sigaltstack-mapping.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/selftests-mm-remove-x-permission-from-sigaltstack-mapping.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: Kevin Brodsky <kevin.brodsky@xxxxxxx>
Subject: selftests/mm: remove X permission from sigaltstack mapping
Date: Mon, 9 Dec 2024 09:50:19 +0000
There is no reason why the alternate signal stack should be mapped as RWX.
Map it as RW instead.
Link: https://lkml.kernel.org/r/20241209095019.1732120-15-kevin.brodsky@xxxxxxx
Signed-off-by: Kevin Brodsky <kevin.brodsky@xxxxxxx>
Cc: Aruna Ramakrishna <aruna.ramakrishna@xxxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: Joey Gouly <joey.gouly@xxxxxxx>
Cc: Keith Lucas <keith.lucas@xxxxxxxxxx>
Cc: Ryan Roberts <ryan.roberts@xxxxxxx>
Cc: Shuah Khan <shuah@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
tools/testing/selftests/mm/pkey_sighandler_tests.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/tools/testing/selftests/mm/pkey_sighandler_tests.c~selftests-mm-remove-x-permission-from-sigaltstack-mapping
+++ a/tools/testing/selftests/mm/pkey_sighandler_tests.c
@@ -315,7 +315,7 @@ static void test_sigsegv_handler_with_di
sys_mprotect_pkey(stack, STACK_SIZE, PROT_READ | PROT_WRITE, pkey);
/* Set up alternate signal stack that will use the default MPK */
- sigstack.ss_sp = mmap(0, STACK_SIZE, PROT_READ | PROT_WRITE | PROT_EXEC,
+ sigstack.ss_sp = mmap(0, STACK_SIZE, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
sigstack.ss_flags = 0;
sigstack.ss_size = STACK_SIZE;
@@ -488,7 +488,7 @@ static void test_pkru_sigreturn(void)
sys_mprotect_pkey(stack, STACK_SIZE, PROT_READ | PROT_WRITE, pkey);
/* Set up alternate signal stack that will use the default MPK */
- sigstack.ss_sp = mmap(0, STACK_SIZE, PROT_READ | PROT_WRITE | PROT_EXEC,
+ sigstack.ss_sp = mmap(0, STACK_SIZE, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
sigstack.ss_flags = 0;
sigstack.ss_size = STACK_SIZE;
_
Patches currently in -mm which might be from kevin.brodsky@xxxxxxx are
selftests-mm-fix-condition-in-uffd_move_test_common.patch
selftests-mm-fix-wmaybe-uninitialized-warnings.patch
selftests-mm-fix-strncpy-length.patch
selftests-mm-fix-warray-bounds-warnings-in-pkey_sighandler_tests.patch
selftests-mm-build-with-o2.patch
selftests-mm-remove-unused-pkey-helpers.patch
selftests-mm-define-types-using-typedef-in-pkey-helpersh.patch
selftests-mm-ensure-pkey-h-define-inline-functions-only.patch
selftests-mm-remove-empty-pkey-helper-definition.patch
selftests-mm-ensure-non-global-pkey-symbols-are-marked-static.patch
selftests-mm-use-sys_pkey-helpers-consistently.patch
selftests-mm-rename-pkey-register-macro.patch
selftests-mm-skip-pkey_sighandler_tests-if-support-is-missing.patch
selftests-mm-remove-x-permission-from-sigaltstack-mapping.patch
