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Subject[PATCH 19/91] Validate size of EFI GUID partition entries.
2.6.27-longterm review patch.  If anyone has any objections, please let us know.

------------------
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 files changed, 6 insertions(+), 0 deletions(-)
Index: longterm-2.6.27/fs/partitions/efi.c
===================================================================
--- longterm-2.6.27.orig/fs/partitions/efi.c 2012-02-05 22:34:34.453915054 +0100
+++ longterm-2.6.27/fs/partitions/efi.c 2012-02-05 22:34:37.590915121 +0100
@@ -343,6 +343,12 @@
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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