1 files changed, 27 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.9/0004-Protect-__release_resource-against-resources-without.patch b/target/linux/brcm2708/patches-4.9/0004-Protect-__release_resource-against-resources-without.patch
new file mode 100644
index 0000000000..f46579b943
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.9/0004-Protect-__release_resource-against-resources-without.patch
@@ -0,0 +1,27 @@
+From 0b4480a51b80954e34605c9bf42947d97e37d1c3 Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.org>
+Date: Fri, 13 Mar 2015 12:43:36 +0000
+Subject: [PATCH] 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
+@@ -246,6 +246,12 @@ 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;