2019-09-19 14:43:19 +00:00
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From 6209e42d384cfe873123b411a9bd170de027d4b5 Mon Sep 17 00:00:00 2001
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2019-07-09 18:32:28 +00:00
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From: Phil Elwell <phil@raspberrypi.org>
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Date: Fri, 13 Mar 2015 12:43:36 +0000
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2019-12-23 12:42:55 +00:00
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Subject: [PATCH] Protect __release_resource against resources without
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2019-07-09 18:32:28 +00:00
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parents
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Without this patch, removing a device tree overlay can crash here.
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Signed-off-by: Phil Elwell <phil@raspberrypi.org>
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---
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kernel/resource.c | 6 ++++++
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1 file changed, 6 insertions(+)
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--- a/kernel/resource.c
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+++ b/kernel/resource.c
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@@ -213,6 +213,12 @@ static int __release_resource(struct res
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{
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struct resource *tmp, **p, *chd;
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+ if (!old->parent) {
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+ WARN(old->sibling, "sibling but no parent");
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+ if (old->sibling)
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+ return -EINVAL;
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+ return 0;
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+ }
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p = &old->parent->child;
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for (;;) {
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tmp = *p;
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