From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Heinrich Schuchardt Date: Mon, 17 Dec 2018 22:00:24 +0100 Subject: [PATCH] grub-core/loader/efi/fdt.c: Do not copy random memory We should not try to copy any memory area which is outside of the original fdt. If this extra memory is controlled by a hypervisor this might end with a crash. Signed-off-by: Heinrich Schuchardt Reviewed-by: Leif Lindholm Reviewed-by: Daniel Kiper --- grub-core/loader/efi/fdt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/grub-core/loader/efi/fdt.c b/grub-core/loader/efi/fdt.c index a9dbcfdfeaf..cecd617dccc 100644 --- a/grub-core/loader/efi/fdt.c +++ b/grub-core/loader/efi/fdt.c @@ -68,7 +68,7 @@ grub_fdt_load (grub_size_t additional_size) if (raw_fdt) { - grub_memmove (fdt, raw_fdt, size); + grub_memmove (fdt, raw_fdt, size - additional_size); grub_fdt_set_totalsize (fdt, size); } else