Commit 63971b0f authored by Gregory Price's avatar Gregory Price Committed by Ard Biesheuvel
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libstub,tpm: do not ignore failure case when reading final event log 



Current code fails to check for an error case when reading events
from final event log to calculate offsets.  Check the error case,
and break early because all subsequent calls will also fail.

Signed-off-by: default avatarGregory Price <gourry@gourry.net>
Signed-off-by: default avatarArd Biesheuvel <ardb@kernel.org>
parent a066397e

drivers/firmware/efi/libstub/tpm.c

+3 −0
Original line number Diff line number Diff line
@@ -124,6 +124,9 @@ static void efi_retrieve_tcg2_eventlog(int version, efi_physical_addr_t log_loca 
			event_size = __calc_tpm2_event_size(header,

						   (void *)(long)log_location,

						   false);

			/* If calc fails this is a malformed log */

			if (!event_size)

				break;

			final_events_size += event_size;

			i--;

		}