From 5b8f3f85bf4df02a104ede7d2f8f53f4a6bc6adc Mon Sep 17 00:00:00 2001
From: Himbeer <himbeer@disroot.org>
Date: Sat, 11 May 2024 13:01:00 +0200
Subject: fdt: Make Node.reg fail if #address-cells or #size-cells is zero

---
 src/fdt.zig | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'src')

diff --git a/src/fdt.zig b/src/fdt.zig
index 14a0e8c..d62e9fd 100644
--- a/src/fdt.zig
+++ b/src/fdt.zig
@@ -67,6 +67,8 @@ pub const Node = struct {
         const address_cells = if (address_cells_bytes) |bytes| std.mem.readInt(u32, bytes[0..4], .Big) else 2;
         const size_cells = if (size_cells_bytes) |bytes| std.mem.readInt(u32, bytes[0..4], .Big) else 1;
 
+        if (address_cells == 0 or size_cells == 0) return null;
+
         const reg_prop = self.props.get("reg") orelse return null;
         const reg_elem_len = 4 * address_cells + 4 * size_cells;
 
-- 
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