openwrt/target/linux/bcm27xx/patches-6.6/950-0066-Protect-__release_resource-against-resources-without.patch
Álvaro Fernández Rojas 8c405cdccc bcm27xx: add 6.6 kernel patches
The patches were generated from the RPi repo with the following command:
git format-patch v6.6.34..rpi-6.1.y

Some patches needed rebasing and, as usual, the applied and reverted, wireless
drivers, Github workflows, READMEs and defconfigs patches were removed.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2024-06-18 18:52:49 +02:00

29 lines
757 B
Diff

From fd4dd0612e2b97840bb5ca1699ff7d779704c4a9 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Fri, 13 Mar 2015 12:43:36 +0000
Subject: [PATCH 0066/1085] Protect __release_resource against resources
without parents
Without this patch, removing a device tree overlay can crash here.
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
---
kernel/resource.c | 6 ++++++
1 file changed, 6 insertions(+)
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -200,6 +200,12 @@ static int __release_resource(struct res
{
struct resource *tmp, **p, *chd;
+ if (!old->parent) {
+ WARN(old->sibling, "sibling but no parent");
+ if (old->sibling)
+ return -EINVAL;
+ return 0;
+ }
p = &old->parent->child;
for (;;) {
tmp = *p;