diff options
| author | Ingo Molnar <mingo@kernel.org> | 2016-09-20 16:59:15 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-09-20 16:59:15 +0200 |
| commit | 2ab78a724b1fd885b65199707b8e053677745457 (patch) | |
| tree | 7df963b952195bf24031651e99e77f343752c11c /drivers | |
| parent | 41a66072c32978ff3914fd6be88f7592ef64bef7 (diff) | |
| parent | 92dc33501bfba74655dbf3ec63ea82d040fd6d58 (diff) | |
Merge tag 'efi-next' of git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/efi into efi/core
Pull EFI fix from Matt Fleming:
* Fix a boot crash reported by Mike Galbraith and Mike Krinkin. The
new EFI memory map reservation code didn't align reservations to
EFI_PAGE_SIZE boundaries causing bogus regions to be inserted into
the global EFI memory map (Matt Fleming)
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/firmware/efi/memmap.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/firmware/efi/memmap.c b/drivers/firmware/efi/memmap.c index cd96086fd851..f03ddecd232b 100644 --- a/drivers/firmware/efi/memmap.c +++ b/drivers/firmware/efi/memmap.c @@ -225,6 +225,17 @@ void __init efi_memmap_insert(struct efi_memory_map *old_memmap, void *buf, m_end = mem->range.end; m_attr = mem->attribute; + /* + * The EFI memory map deals with regions in EFI_PAGE_SIZE + * units. Ensure that the region described by 'mem' is aligned + * correctly. + */ + if (!IS_ALIGNED(m_start, EFI_PAGE_SIZE) || + !IS_ALIGNED(m_end + 1, EFI_PAGE_SIZE)) { + WARN_ON(1); + return; + } + for (old = old_memmap->map, new = buf; old < old_memmap->map_end; old += old_memmap->desc_size, new += old_memmap->desc_size) { |