kernel: bump 5.4 to 5.4.48
[oweals/openwrt.git] / target / linux / bcm27xx / patches-5.4 / 950-0006-Protect-__release_resource-against-resources-without.patch
1 From f60fc28e618bb4830dc626435d45169b9c659311 Mon Sep 17 00:00:00 2001
2 From: Phil Elwell <phil@raspberrypi.org>
3 Date: Fri, 13 Mar 2015 12:43:36 +0000
4 Subject: [PATCH] Protect __release_resource against resources without
5  parents
6
7 Without this patch, removing a device tree overlay can crash here.
8
9 Signed-off-by: Phil Elwell <phil@raspberrypi.org>
10 ---
11  kernel/resource.c | 6 ++++++
12  1 file changed, 6 insertions(+)
13
14 --- a/kernel/resource.c
15 +++ b/kernel/resource.c
16 @@ -214,6 +214,12 @@ static int __release_resource(struct res
17  {
18         struct resource *tmp, **p, *chd;
19  
20 +       if (!old->parent) {
21 +               WARN(old->sibling, "sibling but no parent");
22 +               if (old->sibling)
23 +                       return -EINVAL;
24 +               return 0;
25 +       }
26         p = &old->parent->child;
27         for (;;) {
28                 tmp = *p;