Commit 668a84c1 authored by Changbin Du's avatar Changbin Du Committed by Ard Biesheuvel
Browse files

efi/fdt: fix panic when no valid fdt found 



setup_arch() would invoke efi_init()->efi_get_fdt_params(). If no
valid fdt found then initial_boot_params will be null. So we
should stop further fdt processing here. I encountered this
issue on risc-v.

Signed-off-by: default avatarChangbin Du <changbin.du@gmail.com>
Fixes: b91540d5 ("RISC-V: Add EFI runtime services")
Signed-off-by: default avatarArd Biesheuvel <ardb@kernel.org>
parent 6efb943b

drivers/firmware/efi/fdtparams.c

+3 −0
Original line number Diff line number Diff line
@@ -98,6 +98,9 @@ u64 __init efi_get_fdt_params(struct efi_memory_map_data *mm) 
	BUILD_BUG_ON(ARRAY_SIZE(target) != ARRAY_SIZE(name));

	BUILD_BUG_ON(ARRAY_SIZE(target) != ARRAY_SIZE(dt_params[0].params));



	if (!fdt)

		return 0;



	for (i = 0; i < ARRAY_SIZE(dt_params); i++) {

		node = fdt_path_offset(fdt, dt_params[i].path);

		if (node < 0)