Per the UEFI Specs 2.4, June 2013, the starting lba of the partition
that has the EFI GPT (0xEE) must be set to 0x00000001 - this is obviously
the LBA of the GPT Partition Header.
Signed-off-by: Davidlohr Bueso <davidl...@hp.com>
---
block/partitions/efi.c | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)
diff --git a/block/partitions/efi.c b/block/partitions/efi.c
index 3ebd3d8..6a997b1 100644
--- a/block/partitions/efi.c
+++ b/block/partitions/efi.c
@@ -151,9 +151,18 @@ static u64 last_lba(struct block_device *bdev)
static inline int pmbr_part_valid(gpt_record *part)
{
- if (part->os_type == EFI_PMBR_OSTYPE_EFI_GPT &&
- le32_to_cpu(part->start_sector) == 1UL)
- return 1;
+ if (part->os_type != EFI_PMBR_OSTYPE_EFI_GPT)
+ goto invalid;
+
+ /* set to 0x00000001 (i.e., the LBA of the GPT Partition Header) */
+ if (le32_to_cpu(part->starting_lba) != GPT_PRIMARY_PARTITION_TABLE_LBA)
+ goto invalid;
+
+ if (le32_to_cpu(part->start_sector) != 1UL)
+ goto invalid;
+
+ return 1;
+invalid:
return 0;
}
--
1.7.11.7
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