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path: root/drivers/firmware/efi/libstub/fdt.c
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Diffstat (limited to 'drivers/firmware/efi/libstub/fdt.c')
-rw-r--r--drivers/firmware/efi/libstub/fdt.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/firmware/efi/libstub/fdt.c b/drivers/firmware/efi/libstub/fdt.c
index 91da56c4fd54..ef5d764e2a27 100644
--- a/drivers/firmware/efi/libstub/fdt.c
+++ b/drivers/firmware/efi/libstub/fdt.c
@@ -323,7 +323,7 @@ fail:
return EFI_LOAD_ERROR;
}
-void *get_fdt(efi_system_table_t *sys_table)
+void *get_fdt(efi_system_table_t *sys_table, unsigned long *fdt_size)
{
efi_guid_t fdt_guid = DEVICE_TREE_GUID;
efi_config_table_t *tables;
@@ -336,6 +336,11 @@ void *get_fdt(efi_system_table_t *sys_table)
for (i = 0; i < sys_table->nr_tables; i++)
if (efi_guidcmp(tables[i].guid, fdt_guid) == 0) {
fdt = (void *) tables[i].table;
+ if (fdt_check_header(fdt) != 0) {
+ pr_efi_err(sys_table, "Invalid header detected on UEFI supplied FDT, ignoring ...\n");
+ return NULL;
+ }
+ *fdt_size = fdt_totalsize(fdt);
break;
}