selftests/mm: remove X permission from sigaltstack mapping

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@arm.com
Signed-off-by: Kevin Brodsky <kevin.brodsky@arm.com>
Cc: Aruna Ramakrishna <aruna.ramakrishna@oracle.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Joey Gouly <joey.gouly@arm.com>
Cc: Keith Lucas <keith.lucas@oracle.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/tools/testing/selftests/mm/pkey_sighandler_tests.c b/tools/testing/selftests/mm/pkey_sighandler_tests.c
index 4f3679d11c05e44c44397ebb23a74c1480c3849c..1ac8c880988076de9949efec4ab542170efb0d8f 100644 (file)
--- a/tools/testing/selftests/mm/pkey_sighandler_tests.c
+++ b/tools/testing/selftests/mm/pkey_sighandler_tests.c
@@ -315,7 +315,7 @@ static void test_sigsegv_handler_with_different_pkey_for_stack(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;
@@ -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;