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From b5e65f6a5a75c72d56d98c9543ff549710aa2d72 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Fri, 13 Mar 2015 12:43:36 +0000
Subject: [PATCH 005/703] 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
@@ -213,6 +213,12 @@ 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;
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