From 984c98b47f9ffd5f57599e604df2cc09c63f74ba Mon Sep 17 00:00:00 2001 From: Phil Elwell 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 --- kernel/resource.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/kernel/resource.c +++ b/kernel/resource.c @@ -237,6 +237,12 @@ static int __release_resource(struct res { struct resource *tmp, **p; + if (!old->parent) { + WARN(old->sibling, "sibling but no parent"); + if (old->sibling) + return -EINVAL; + return 0; + } p = &old->parent->child; for (;;) { tmp = *p;