[U-Boot] [PATCH 1/1] efi_loader: check length in CreateDeviceNode()

[Heinrich Schuchardt]

When creating a device path node ensure that the size of the allocated
memory at lest matches the size of the node header.

Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
---
 lib/efi_loader/efi_device_path.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/efi_loader/efi_device_path.c b/lib/efi_loader/efi_device_path.c
index 6104c7d33b..10f890f44f 100644
--- a/lib/efi_loader/efi_device_path.c
+++ b/lib/efi_loader/efi_device_path.c
@@ -335,6 +335,9 @@ struct efi_device_path *efi_dp_create_device_node(const u8 type,
 {
 	struct efi_device_path *ret;

+	if (length < sizeof(struct efi_device_path))
+		return NULL;
+
 	ret = dp_alloc(length);
 	if (!ret)
 		return ret;
--
2.20.1