diff --git a/security/integrity/platform_certs/keyring_handler.h b/security/integrity/platform_certs/keyring_handler.h index 2462bfa08fe3..cd06bd6072be 100644 --- a/security/integrity/platform_certs/keyring_handler.h +++ b/security/integrity/platform_certs/keyring_handler.h @@ -30,3 +30,11 @@ efi_element_handler_t get_handler_for_db(const efi_guid_t *sig_type); efi_element_handler_t get_handler_for_dbx(const efi_guid_t *sig_type); #endif + +#ifndef UEFI_QUIRK_SKIP_CERT +#define UEFI_QUIRK_SKIP_CERT(vendor, product) \ + .matches = { \ + DMI_MATCH(DMI_BOARD_VENDOR, vendor), \ + DMI_MATCH(DMI_PRODUCT_NAME, product), \ + }, +#endif diff --git a/security/integrity/platform_certs/load_uefi.c b/security/integrity/platform_certs/load_uefi.c index f290f78c3f30..4ccd79407fec 100644 --- a/security/integrity/platform_certs/load_uefi.c +++ b/security/integrity/platform_certs/load_uefi.c @@ -3,6 +3,7 @@ #include #include #include +#include #include #include #include @@ -11,6 +12,32 @@ #include "../integrity.h" #include "keyring_handler.h" +/* Apple Macs with T2 Security chip don't support these UEFI variables. + * The T2 chip manages the Secure Boot and does not allow Linux to boot + * if it is turned on. If turned off, an attempt to get certificates + * causes a crash, so we simply return 0 for them in each function. + */ + +static const struct dmi_system_id uefi_skip_cert[] = { + + { UEFI_QUIRK_SKIP_CERT("Apple Inc.", "MacBookPro15,1") }, + { UEFI_QUIRK_SKIP_CERT("Apple Inc.", "MacBookPro15,2") }, + { UEFI_QUIRK_SKIP_CERT("Apple Inc.", "MacBookPro15,3") }, + { UEFI_QUIRK_SKIP_CERT("Apple Inc.", "MacBookPro15,4") }, + { UEFI_QUIRK_SKIP_CERT("Apple Inc.", "MacBookPro16,1") }, + { UEFI_QUIRK_SKIP_CERT("Apple Inc.", "MacBookPro16,2") }, + { UEFI_QUIRK_SKIP_CERT("Apple Inc.", "MacBookPro16,3") }, + { UEFI_QUIRK_SKIP_CERT("Apple Inc.", "MacBookPro16,4") }, + { UEFI_QUIRK_SKIP_CERT("Apple Inc.", "MacBookAir8,1") }, + { UEFI_QUIRK_SKIP_CERT("Apple Inc.", "MacBookAir8,2") }, + { UEFI_QUIRK_SKIP_CERT("Apple Inc.", "MacBookAir9,1") }, + { UEFI_QUIRK_SKIP_CERT("Apple Inc.", "MacMini8,1") }, + { UEFI_QUIRK_SKIP_CERT("Apple Inc.", "MacPro7,1") }, + { UEFI_QUIRK_SKIP_CERT("Apple Inc.", "iMac20,1") }, + { UEFI_QUIRK_SKIP_CERT("Apple Inc.", "iMac20,2") }, + { } +}; + /* * Look to see if a UEFI variable called MokIgnoreDB exists and return true if * it does. @@ -20,12 +47,18 @@ * is set, we should ignore the db variable also and the true return indicates * this. */ + static __init bool uefi_check_ignore_db(void) { efi_status_t status; unsigned int db = 0; unsigned long size = sizeof(db); efi_guid_t guid = EFI_SHIM_LOCK_GUID; + const struct dmi_system_id *dmi_id; + + dmi_id = dmi_first_match(uefi_skip_cert); + if (dmi_id) + return 0; status = efi.get_variable(L"MokIgnoreDB", &guid, NULL, &size, &db); return status == EFI_SUCCESS; @@ -40,6 +73,11 @@ static __init void *get_cert_list(efi_char16_t *name, efi_guid_t *guid, unsigned long lsize = 4; unsigned long tmpdb[4]; void *db; + const struct dmi_system_id *dmi_id; + + dmi_id = dmi_first_match(uefi_skip_cert); + if (dmi_id) + return 0; *status = efi.get_variable(name, guid, NULL, &lsize, &tmpdb); if (*status == EFI_NOT_FOUND) @@ -84,6 +122,11 @@ static int __init load_moklist_certs(void) unsigned long moksize; efi_status_t status; int rc; + const struct dmi_system_id *dmi_id; + + dmi_id = dmi_first_match(uefi_skip_cert); + if (dmi_id) + return 0; /* First try to load certs from the EFI MOKvar config table. * It's not an error if the MOKvar config table doesn't exist @@ -137,6 +180,11 @@ static int __init load_uefi_certs(void) unsigned long dbsize = 0, dbxsize = 0, mokxsize = 0; efi_status_t status; int rc = 0; + const struct dmi_system_id *dmi_id; + + dmi_id = dmi_first_match(uefi_skip_cert); + if (dmi_id) + return 0; if (!efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE)) return false;