vbatts
/
grub
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

gpt: check header and entries status bits together 

Use the new status function which checks *_HEADER_VALID and
*_ENTRIES_VALID bits together. It doesn't make sense for the header and
entries bits to mismatch so don't allow for it.
This commit is contained in:
Michael Marineau 2016-09-21 13:44:11 -07:00
parent d57c41e8f5
commit de8d29ef89
1 changed files with 5 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
grub-core/lib/gpt.c
View File

@ -589,24 +589,20 @@ grub_gpt_repair (grub_disk_t disk, grub_gpt_t gpt)
return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
"GPT sector size must match disk sector size");
if (!(gpt->status & GRUB_GPT_PRIMARY_ENTRIES_VALID ||
gpt->status & GRUB_GPT_BACKUP_ENTRIES_VALID))
return grub_error (GRUB_ERR_BUG, "No valid GPT entries");
if (gpt->status & GRUB_GPT_PRIMARY_HEADER_VALID)
if (grub_gpt_primary_valid (gpt))
{
grub_dprintf ("gpt", "primary GPT header is valid\n");
grub_dprintf ("gpt", "primary GPT is valid\n");
backup_header = grub_le_to_cpu64 (gpt->primary.alternate_lba);
grub_memcpy (&gpt->backup, &gpt->primary, sizeof (gpt->backup));
}
else if (gpt->status & GRUB_GPT_BACKUP_HEADER_VALID)
else if (grub_gpt_backup_valid (gpt))
{
grub_dprintf ("gpt", "backup GPT header is valid\n");
grub_dprintf ("gpt", "backup GPT is valid\n");
backup_header = grub_le_to_cpu64 (gpt->backup.header_lba);
grub_memcpy (&gpt->primary, &gpt->backup, sizeof (gpt->primary));
}
else
return grub_error (GRUB_ERR_BUG, "No valid GPT header");
return grub_error (GRUB_ERR_BUG, "No valid GPT");
/* Relocate backup to end if disk whenever possible. */
if (grub_gpt_disk_size_valid(disk))