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    Subject[02/21] Validate size of EFI GUID partition entries.
    2.6.32-longterm review patch.  If anyone has any objections, please let us know.

    ------------------

    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;




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