Messages in this thread Patch in this message | | | Date | Thu, 19 May 2011 11:30:34 -0700 | From | Greg KH <> | Subject | [02/24] Validate size of EFI GUID partition entries. |
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2.6.33-longterm review patch. If anyone has any objections, please let us know.
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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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