On Tue, Jul 28, 2009 at 11:42:07PM +0200, Vladimir 'phcoder' Serbinenko wrote:
> diff --git a/ChangeLog b/ChangeLog
> index 23c288e..74b9247 100644
> --- a/ChangeLog
> +++ b/ChangeLog
> @@ -1,5 +1,10 @@
> 2009-07-28 Vladimir Serbinenko <phco...@gmail.com>
>
> + * partmap/pc.c (pc_partition_map_iterate): Check that boot flags are
> + valid.
> +
> +2009-07-28 Vladimir Serbinenko <phco...@gmail.com>
> +
> * loader/i386/multiboot_helper.S (grub_multiboot_backward_relocator):
> Clear direction flag before jumping to OS.
> (grub_multiboot2_real_boot): Likewise.
> diff --git a/partmap/pc.c b/partmap/pc.c
> index 6f68ecf..6a2efd2 100644
> --- a/partmap/pc.c
> +++ b/partmap/pc.c
> @@ -121,6 +121,10 @@ pc_partition_map_iterate (grub_disk_t disk,
> if (mbr.signature != grub_cpu_to_le16 (GRUB_PC_PARTITION_SIGNATURE))
> return grub_error (GRUB_ERR_BAD_PART_TABLE, "no signature");
>
> + for (i = 0; i < 4; i++)
> + if (mbr.entries[i].flag & 0x7f)
> + return grub_error (GRUB_ERR_BAD_PART_TABLE, "bad boot flag");
> +
> /* Analyze DOS partitions. */
> for (p.index = 0; p.index < 4; p.index++)
> {
Looks fine to me.
--
Robert Millan
The DRM opt-in fallacy: "Your data belongs to us. We will decide when (and
how) you may access your data; but nobody's threatening your freedom: we
still allow you to remove your data and not access it at all."
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