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| author | Timo Warns <Warns@pre-sense.de> | 2011-05-06 13:47:35 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-05-23 11:20:14 -0700 |
| commit | 88b5ff36c09c33d8b47d4c485bbb9c4ec136232b (patch) | |
| tree | a7c9a61da75855997fc13f4946ef757833b3895f | |
| parent | b3f815365f0bf897ece5d2896cb0534a9b70d28c (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>
| -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 49cfd5f5423..2aac7764b7e 100644 --- a/fs/partitions/efi.c +++ b/fs/partitions/efi.c @@ -349,6 +349,12 @@ 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; |