diff --git a/kernel/signal.c b/kernel/signal.c
index 53e07d9..e1d7ad8 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -3997,7 +3997,7 @@ SYSCALL_DEFINE3(sigaction, int, sig,
 
 	if (act) {
 		old_sigset_t mask;
-		if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
+		if (!access_ok(act, sizeof(*act)) ||
 		    __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
 		    __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||
 		    __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
@@ -4012,7 +4012,7 @@ SYSCALL_DEFINE3(sigaction, int, sig,
 	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
 
 	if (!ret && oact) {
-		if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
+		if (!access_ok(oact, sizeof(*oact)) ||
 		    __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
 		    __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) ||
 		    __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
@@ -4034,7 +4034,7 @@ COMPAT_SYSCALL_DEFINE3(sigaction, int, sig,
 	compat_uptr_t handler, restorer;
 
 	if (act) {
-		if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
+		if (!access_ok(act, sizeof(*act)) ||
 		    __get_user(handler, &act->sa_handler) ||
 		    __get_user(restorer, &act->sa_restorer) ||
 		    __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
@@ -4052,7 +4052,7 @@ COMPAT_SYSCALL_DEFINE3(sigaction, int, sig,
 	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
 
 	if (!ret && oact) {
-		if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
+		if (!access_ok(oact, sizeof(*oact)) ||
 		    __put_user(ptr_to_compat(old_ka.sa.sa_handler),
 			       &oact->sa_handler) ||
 		    __put_user(ptr_to_compat(old_ka.sa.sa_restorer),