From ae0e0228e664f31ac3c6093758ddc85b664e2d08 Mon Sep 17 00:00:00 2001
From: Patrick Delaunay <patrick.delaunay@st.com>
Date: Wed, 18 Oct 2017 15:11:05 +0200
Subject: [PATCH] disk: efi: correct the overlap check on GPT header and PTE
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the partition starting at 0x4400 is refused with overlap error:
$> gpt write mmc 0 "name=test,start=0x4400,size=0"
Writing GPT: Partition overlap
error!
even if the 0x4400 is the first available offset for LBA35 with default
value:
- MBR=LBA1
- GPT header=LBA2
- PTE= 32 LBAs (128 entry), 3 to 34
And the command to have one partition for all the disk failed also :
$> gpt write mmc 0 "name=test,size=0"
After the patch :
$> gpt write mmc 0 "name=test,size=0"
Writing GPT: success!
$> part list mmc 0
Partition Map for MMC device 0 -- Partition Type: EFI
Part Start LBA End LBA Name
Attributes
Type GUID
Partition GUID
1 0x00000022 0x01ce9fde "test"
attrs: 0x0000000000000000
type: ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
type: data
guid: b4b84b8a-04e3-4000-0036-aff5c9c495b1
And 0x22 = 34 LBA => offset = 0x4400 is accepted as expected
Reviewed-by: Åukasz Majewski <lukma@denx.de>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
---
disk/part_efi.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/disk/part_efi.c b/disk/part_efi.c
index 782f8be502..7862beeea6 100644
--- a/disk/part_efi.c
+++ b/disk/part_efi.c
@@ -469,8 +469,8 @@ int gpt_fill_pte(struct blk_desc *dev_desc,
* If our partition overlaps with either the GPT
* header, or the partition entry, reject it.
*/
- if (((start <= hdr_end && hdr_start <= (start + size)) ||
- (start <= pte_end && pte_start <= (start + size)))) {
+ if (((start < hdr_end && hdr_start < (start + size)) ||
+ (start < pte_end && pte_start < (start + size)))) {
printf("Partition overlap\n");
return -1;
}
--
2.39.5