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grub-core/loader/efi/fdt.c: Do not copy random memory

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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 <xypron.glpk@gmx.de>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This commit is contained in:
Heinrich Schuchardt 2018-12-17 22:00:24 +01:00 committed by Vincent Batts
parent c338629625
commit e0d444d0bb
1 changed files with 1 additions and 1 deletions
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2
grub-core/loader/efi/fdt.c
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@ -66,7 +66,7 @@ grub_fdt_load (grub_size_t additional_size)
if (raw_fdt) if (raw_fdt)
{ {
grub_memmove (fdt, raw_fdt, size); grub_memmove (fdt, raw_fdt, size - additional_size);
grub_fdt_set_totalsize (fdt, size); grub_fdt_set_totalsize (fdt, size);
} }
else else