From 7d1e4b73e3f321cd4f0e039aa0387484cf97b25c Mon Sep 17 00:00:00 2001 From: Heinrich Schuchardt Date: Tue, 23 Apr 2019 00:51:01 +0200 Subject: [PATCH] efi_loader: check length in CreateDeviceNode() 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 --- 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; -- 2.39.5