Messages in this thread Patch in this message | | | Date | Sun, 05 Feb 2012 23:10:08 +0100 | From | Willy Tarreau <> | Subject | [PATCH 19/91] Validate size of EFI GUID partition entries. |
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2.6.27-longterm review patch. If anyone has any objections, please let us know.
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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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