openwrt/target/linux/brcm2708/patches-4.9/950-0010-serial-8250-Don-t-crash-when-nr_uarts-is-0.patch
Koen Vandeputte 82c8170cd0 kernel: bump 4.9 to 4.9.219
Refreshed all patches.

Altered patches:
- 0026-NET-multi-phy-support.patch

Fixes:
- CVE-2020-8647
- CVE-2020-8648 (Potentially)
- CVE-2020-8649

Compile-tested on: ar71xx
Runtime-tested on: ar71xx

Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
2020-04-16 13:24:54 +02:00

21 lines
609 B
Diff

From cc016c1876877aa42a84cc9c0c89af1b7410ff67 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Tue, 30 Jun 2015 14:12:42 +0100
Subject: [PATCH] serial: 8250: Don't crash when nr_uarts is 0
---
drivers/tty/serial/8250/8250_core.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/tty/serial/8250/8250_core.c
+++ b/drivers/tty/serial/8250/8250_core.c
@@ -508,6 +508,8 @@ static void __init serial8250_isa_init_p
if (nr_uarts > UART_NR)
nr_uarts = UART_NR;
+ if (!nr_uarts)
+ return;
for (i = 0; i < nr_uarts; i++) {
struct uart_8250_port *up = &serial8250_ports[i];