| From fa039d5f6b126fbd65eefa05db2f67e44df8f121 Mon Sep 17 00:00:00 2001 |
| From: Timo Warns <Warns@pre-sense.de> |
| Date: Fri, 6 May 2011 13:47:35 +0200 |
| Subject: Validate size of EFI GUID partition entries. |
| |
| From: Timo Warns <Warns@pre-sense.de> |
| |
| commit fa039d5f6b126fbd65eefa05db2f67e44df8f121 upstream. |
| |
| Otherwise corrupted EFI partition tables can cause total confusion. |
| |
| Signed-off-by: Timo Warns <warns@pre-sense.de> |
| Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> |
| |
| --- |
| fs/partitions/efi.c | 6 ++++++ |
| 1 file changed, 6 insertions(+) |
| |
| --- a/fs/partitions/efi.c |
| +++ b/fs/partitions/efi.c |
| @@ -349,6 +349,12 @@ is_gpt_valid(struct block_device *bdev, |
| goto fail; |
| } |
| |
| + /* Check that sizeof_partition_entry has the correct value */ |
| + if (le32_to_cpu((*gpt)->sizeof_partition_entry) != sizeof(gpt_entry)) { |
| + pr_debug("GUID Partitition Entry Size check failed.\n"); |
| + goto fail; |
| + } |
| + |
| if (!(*ptes = alloc_read_gpt_entries(bdev, *gpt))) |
| goto fail; |
| |
