leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

partitions/efi: check pmbr record's starting lba

Browse Source 
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.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Davidlohr Bueso <davidlohr@hp.com>
Reviewed-by: Karel Zak <kzak@redhat.com>
Acked-by: Matt Fleming <matt.fleming@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Davidlohr Bueso 2013-09-11 14:24:56 -07:00 committed by Linus Torvalds
parent c2ebdc2439
commit 33afd7a7df
1 changed files with 13 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
block/partitions/efi.c
View File

@ -151,10 +151,19 @@ static u64 last_lba(struct block_device *bdev)
static inline int pmbr_part_valid(gpt_mbr_record *part)
{
if (part->os_type == EFI_PMBR_OSTYPE_EFI_GPT &&
le32_to_cpu(part->start_sector) == 1UL)
return 1;
return 0;
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;
}
/**