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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/arch/ia64/kernel/signal.c
..
..
@@ -132,7 +132,7 @@
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 		 */
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 		retval = (long) &ia64_strace_leave_kernel;
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-	if (!access_ok(VERIFY_READ, sc, sizeof(*sc)))
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+	if (!access_ok(sc, sizeof(*sc)))
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 		goto give_sigsegv;
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 	if (GET_SIGSET(&set, &sc->sc_mask))
..
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@@ -152,7 +152,7 @@
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 	return retval;
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   give_sigsegv:
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-	force_sig(SIGSEGV, current);
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+	force_sig(SIGSEGV);
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 	return retval;
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 }
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..
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@@ -257,15 +257,15 @@
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 			 */
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 			check_sp = (new_sp - sizeof(*frame)) & -STACK_ALIGN;
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 			if (!likely(on_sig_stack(check_sp))) {
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-				force_sigsegv(ksig->sig, current);
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+				force_sigsegv(ksig->sig);
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 				return 1;
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 			}
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 		}
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 	}
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 	frame = (void __user *) ((new_sp - sizeof(*frame)) & -STACK_ALIGN);
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266
 
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-	if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) {
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-		force_sigsegv(ksig->sig, current);
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+	if (!access_ok(frame, sizeof(*frame))) {
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+		force_sigsegv(ksig->sig);
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 		return 1;
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 	}
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271
 
..
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@@ -282,7 +282,7 @@
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 	err |= setup_sigcontext(&frame->sc, set, scr);
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283
 
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 	if (unlikely(err)) {
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-		force_sigsegv(ksig->sig, current);
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+		force_sigsegv(ksig->sig);
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 		return 1;
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 	}
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..
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@@ -341,13 +341,14 @@
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 	 * need to push through a forced SIGSEGV.
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 	 */
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 	while (1) {
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-		get_signal(&ksig);
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+		if (!get_signal(&ksig))
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+			break;
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346
 
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 		/*
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-		 * get_signal_to_deliver() may have run a debugger (via notify_parent())
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+		 * get_signal() may have run a debugger (via notify_parent())
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 		 * and the debugger may have modified the state (e.g., to arrange for an
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 		 * inferior call), thus it's important to check for restarting _after_
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-		 * get_signal_to_deliver().
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+		 * get_signal().
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 		 */
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 		if ((long) scr->pt.r10 != -1)
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 			/*
..
..
@@ -363,19 +364,19 @@
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364
 
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 		if (unlikely(restart)) {
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 			switch (errno) {
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-			      case ERESTART_RESTARTBLOCK:
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-			      case ERESTARTNOHAND:
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+			case ERESTART_RESTARTBLOCK:
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+			case ERESTARTNOHAND:
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 				scr->pt.r8 = EINTR;
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 				/* note: scr->pt.r10 is already -1 */
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 				break;
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-
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-			      case ERESTARTSYS:
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+			case ERESTARTSYS:
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 				if ((ksig.ka.sa.sa_flags & SA_RESTART) == 0) {
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 					scr->pt.r8 = EINTR;
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 					/* note: scr->pt.r10 is already -1 */
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 					break;
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 				}
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-			      case ERESTARTNOINTR:
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+				fallthrough;
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+			case ERESTARTNOINTR:
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 				ia64_decrement_ip(&scr->pt);
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 				restart = 0; /* don't restart twice if handle_signal() fails... */
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 			}