diff options
| author | Timo Warns <Warns@pre-sense.de> | 2011-05-06 13:47:35 +0200 |
|---|---|---|
| committer | Willy Tarreau <w@1wt.eu> | 2012-02-11 15:37:26 +0100 |
| commit | 78502a11878ae97dab80957b5f1a57c2ac556202 (patch) | |
| tree | 1533efaa6d1e5765cf9ba8a320048ca5ee96f5f2 | |
| parent | 5deca54d37cd52333783def09203ac245d73de92 (diff) | |
Validate size of EFI GUID partition entries.
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>
Signed-off-by: Willy Tarreau <w@1wt.eu>
| -rw-r--r-- | fs/partitions/efi.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/partitions/efi.c b/fs/partitions/efi.c index 038a6022152f..20b583e37c57 100644 --- a/fs/partitions/efi.c +++ b/fs/partitions/efi.c @@ -343,6 +343,12 @@ is_gpt_valid(struct block_device *bdev, u64 lba, 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; |