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[2/7] fdt: Check for a valid fdt in oftree_ensure()

Message ID 20231112152754.130399-3-sjg@chromium.org
State Accepted
Commit 9578dd856a72b0412fa65480d8e3c76a52a6cba1
Delegated to: Simon Glass
Headers show
Series fdt: Move towards using ofnode for devicetree fixups | expand

Commit Message

Simon Glass Nov. 12, 2023, 3:27 p.m. UTC 
Check the header before starting to use it, since this could provide
very confusing later, when ofnode calls start to fail.

Signed-off-by: Simon Glass <sjg@chromium.org>
---

 drivers/core/ofnode.c | 5 +++++
 1 file changed, 5 insertions(+)
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Patch

diff --git a/drivers/core/ofnode.c b/drivers/core/ofnode.c
index c3d326831fc6..3956e1999c36 100644
--- a/drivers/core/ofnode.c
+++ b/drivers/core/ofnode.c
@@ -83,6 +83,11 @@  static oftree oftree_ensure(void *fdt)
 			if (check_tree_count())
 				return oftree_null();
 
+			if (fdt_check_header(fdt)) {
+				log_err("Invalid device tree blob header\n");
+				return oftree_null();
+			}
+
 			/* register the new tree */
 			i = oftree_count++;
 			oftree_list[i] = fdt;