Merge tag 'v3.10.78' into update

This is the 3.10.78 stable release

arch/arc/kernel/signal.c

@@ -131,6 +131,15 @@ SYSCALL_DEFINE0(rt_sigreturn)
 	/* Don't restart from sigreturn */
 	syscall_wont_restart(regs);
 
+	/*
+	 * Ensure that sigreturn always returns to user mode (in case the
+	 * regs saved on user stack got fudged between save and sigreturn)
+	 * Otherwise it is easy to panic the kernel with a custom
+	 * signal handler and/or restorer which clobberes the status32/ret
+	 * to return to a bogus location in kernel mode.
+	 */
+	regs->status32 |= STATUS_U_MASK;
+
 	return regs->r0;
 
 badframe:
@@ -234,8 +243,11 @@ setup_rt_frame(int signo, struct k_sigaction *ka, siginfo_t *info,
 
 	/*
 	 * handler returns using sigreturn stub provided already by userpsace
+	 * If not, nuke the process right away
 	 */
-	BUG_ON(!(ka->sa.sa_flags & SA_RESTORER));
+	if(!(ka->sa.sa_flags & SA_RESTORER))
+		return 1;
+
 	regs->blink = (unsigned long)ka->sa.sa_restorer;
 
 	/* User Stack for signal handler will be above the frame just carved */
@@ -302,12 +314,12 @@ handle_signal(unsigned long sig, struct k_sigaction *ka, siginfo_t *info,
 	      struct pt_regs *regs)
 {
 	sigset_t *oldset = sigmask_to_save();
-	int ret;
+	int failed;
 
 	/* Set up the stack frame */
-	ret = setup_rt_frame(sig, ka, info, oldset, regs);
+	failed = setup_rt_frame(sig, ka, info, oldset, regs);
 
-	if (ret)
+	if (failed)
 		force_sigsegv(sig, current);
 	else
 		signal_delivered(sig, info, ka, regs, 0);

arch/arm/boot/dts/dove.dtsi

@@ -75,7 +75,7 @@
 
 		uart2: serial@12200 {
 			compatible = "ns16550a";
-			reg = <0x12000 0x100>;
+			reg = <0x12200 0x100>;
 			reg-shift = <2>;
 			interrupts = <9>;
 			clocks = <&core_clk 0>;
@@ -84,7 +84,7 @@
 
 		uart3: serial@12300 {
 			compatible = "ns16550a";
-			reg = <0x12100 0x100>;
+			reg = <0x12300 0x100>;
 			reg-shift = <2>;
 			interrupts = <10>;
 			clocks = <&core_clk 0>;