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Commit fa039d5f authored by Timo Warns's avatar Timo Warns Committed by Linus Torvalds
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Validate size of EFI GUID partition entries. 



Otherwise corrupted EFI partition tables can cause total confusion.

Signed-off-by: default avatarTimo Warns <warns@pre-sense.de>
Cc: stable@kernel.org
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent bfd412db

fs/partitions/efi.c

+6 −0
Original line number Diff line number Diff line
@@ -348,6 +348,12 @@ static int is_gpt_valid(struct parsed_partitions *state, u64 lba, 
		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)))

		goto fail;