3047 int do_sigaction(int sig, struct k_sigaction *act, struct k_sigaction *oact)  in do_sigaction()  argument
3053 	if (!valid_signal(sig) || sig < 1 || (act && sig_kernel_only(sig)))  in do_sigaction()
3062 	if (act) {  in do_sigaction()
3063 		sigdelsetmask(&act->sa.sa_mask,  in do_sigaction()
3065 		*k = *act;  in do_sigaction()
3299 		const struct sigaction __user *, act,  in SYSCALL_DEFINE4()
3310 	if (act) {  in SYSCALL_DEFINE4()
3311 		if (copy_from_user(&new_sa.sa, act, sizeof(new_sa.sa)))  in SYSCALL_DEFINE4()
3315 	ret = do_sigaction(sig, act ? &new_sa : NULL, oact ? &old_sa : NULL);  in SYSCALL_DEFINE4()
3326 		const struct compat_sigaction __user *, act,  in COMPAT_SYSCALL_DEFINE4()
3341 	if (act) {  in COMPAT_SYSCALL_DEFINE4()
3343 		ret = get_user(handler, &act->sa_handler);  in COMPAT_SYSCALL_DEFINE4()
3346 		ret |= get_user(restorer, &act->sa_restorer);  in COMPAT_SYSCALL_DEFINE4()
3349 		ret |= copy_from_user(&mask, &act->sa_mask, sizeof(mask));  in COMPAT_SYSCALL_DEFINE4()
3350 		ret |= get_user(new_ka.sa.sa_flags, &act->sa_flags);  in COMPAT_SYSCALL_DEFINE4()
3356 	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);  in COMPAT_SYSCALL_DEFINE4()
3375 		const struct old_sigaction __user *, act,  in SYSCALL_DEFINE3()
3381 	if (act) {  in SYSCALL_DEFINE3()
3383 		if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||  in SYSCALL_DEFINE3()
3384 		    __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||  in SYSCALL_DEFINE3()
3385 		    __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||  in SYSCALL_DEFINE3()
3386 		    __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||  in SYSCALL_DEFINE3()
3387 		    __get_user(mask, &act->sa_mask))  in SYSCALL_DEFINE3()
3395 	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);  in SYSCALL_DEFINE3()
3411 		const struct compat_old_sigaction __user *, act,  in COMPAT_SYSCALL_DEFINE3()
3419 	if (act) {  in COMPAT_SYSCALL_DEFINE3()
3420 		if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||  in COMPAT_SYSCALL_DEFINE3()
3421 		    __get_user(handler, &act->sa_handler) ||  in COMPAT_SYSCALL_DEFINE3()
3422 		    __get_user(restorer, &act->sa_restorer) ||  in COMPAT_SYSCALL_DEFINE3()
3423 		    __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||  in COMPAT_SYSCALL_DEFINE3()
3424 		    __get_user(mask, &act->sa_mask))  in COMPAT_SYSCALL_DEFINE3()
3435 	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);  in COMPAT_SYSCALL_DEFINE3()