[PATCH] efi_loader: Measure secure boot variables in the correct PCR if DeployedMode is set
Ilias Apalodimas
ilias.apalodimas at linaro.org
Fri Jul 3 15:01:37 CEST 2026
PK, KEK, db, dbx etc must always be measured in PCR7.
DeployedMode and AuditMode should be measured in PCR1 if DeployedMode
is set and PCR7 otherwise.
Fix the u16_strcmp to only change the PCR value for those two variables.
Signed-off-by: Ilias Apalodimas <ilias.apalodimas at linaro.org>
---
lib/efi_loader/efi_tcg2.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/lib/efi_loader/efi_tcg2.c b/lib/efi_loader/efi_tcg2.c
index 07637df7660b..5f9bbe974555 100644
--- a/lib/efi_loader/efi_tcg2.c
+++ b/lib/efi_loader/efi_tcg2.c
@@ -1535,9 +1535,9 @@ static efi_status_t tcg2_measure_secure_boot_variable(struct udevice *dev)
if (!data && !secure_variables[i].accept_empty)
continue;
- if (u16_strcmp(u"DeployedMode", secure_variables[i].name))
+ if (!u16_strcmp(u"DeployedMode", secure_variables[i].name))
secure_variables[i].pcr_index = deployed_audit_pcr_index;
- if (u16_strcmp(u"AuditMode", secure_variables[i].name))
+ if (!u16_strcmp(u"AuditMode", secure_variables[i].name))
secure_variables[i].pcr_index = deployed_audit_pcr_index;
ret = tcg2_measure_variable(dev, secure_variables[i].pcr_index,
--
2.53.0
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