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authorMichal Suchanek <msuchanek@suse.de>2021-07-08 11:46:54 +0200
committerArd Biesheuvel <ardb@kernel.org>2021-07-16 18:04:55 +0200
commit674a9f1f6815849bfb5bf385e7da8fc198aaaba9 (patch)
tree0282c9bad85e08984197a33f6296787b5b8b48db /drivers/firmware
parentLinux 5.14-rc1 (diff)
downloadlinux-674a9f1f6815849bfb5bf385e7da8fc198aaaba9.tar.xz
linux-674a9f1f6815849bfb5bf385e7da8fc198aaaba9.zip
efi/tpm: Differentiate missing and invalid final event log table.
Missing TPM final event log table is not a firmware bug. Clearly if providing event log in the old format makes the final event log invalid it should not be provided at least in that case. Fixes: b4f1874c6216 ("tpm: check event log version before reading final events") Signed-off-by: Michal Suchanek <msuchanek@suse.de> Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org> Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Diffstat (limited to 'drivers/firmware')
-rw-r--r--drivers/firmware/efi/tpm.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/firmware/efi/tpm.c b/drivers/firmware/efi/tpm.c
index c1955d320fec..8f665678e9e3 100644
--- a/drivers/firmware/efi/tpm.c
+++ b/drivers/firmware/efi/tpm.c
@@ -62,9 +62,11 @@ int __init efi_tpm_eventlog_init(void)
tbl_size = sizeof(*log_tbl) + log_tbl->size;
memblock_reserve(efi.tpm_log, tbl_size);
- if (efi.tpm_final_log == EFI_INVALID_TABLE_ADDR ||
- log_tbl->version != EFI_TCG2_EVENT_LOG_FORMAT_TCG_2) {
- pr_warn(FW_BUG "TPM Final Events table missing or invalid\n");
+ if (efi.tpm_final_log == EFI_INVALID_TABLE_ADDR) {
+ pr_info("TPM Final Events table not present\n");
+ goto out;
+ } else if (log_tbl->version != EFI_TCG2_EVENT_LOG_FORMAT_TCG_2) {
+ pr_warn(FW_BUG "TPM Final Events table invalid\n");
goto out;
}