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Validate size of EFI GUID partition entries. 

Otherwise corrupted EFI partition tables can cause total confusion.

Signed-off-by: Timo Warns <warns@pre-sense.de>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Timo Warns 2011-05-06 13:47:35 +02:00 committed by Linus Torvalds
parent bfd412db9e
commit fa039d5f6b
1 changed files with 6 additions and 0 deletions
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6
fs/partitions/efi.c
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@ -348,6 +348,12 @@ static int is_gpt_valid(struct parsed_partitions *state, u64 lba,
goto fail; 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(state, *gpt))) if (!(*ptes = alloc_read_gpt_entries(state, *gpt)))
goto fail; goto fail;