diff options
Diffstat (limited to 'drivers/char/tpm/eventlog')
| -rw-r--r-- | drivers/char/tpm/eventlog/acpi.c | 7 | ||||
| -rw-r--r-- | drivers/char/tpm/eventlog/common.c | 7 | ||||
| -rw-r--r-- | drivers/char/tpm/eventlog/efi.c | 66 | ||||
| -rw-r--r-- | drivers/char/tpm/eventlog/of.c | 7 | ||||
| -rw-r--r-- | drivers/char/tpm/eventlog/tpm1.c | 7 | ||||
| -rw-r--r-- | drivers/char/tpm/eventlog/tpm2.c | 53 |
6 files changed, 59 insertions, 88 deletions
diff --git a/drivers/char/tpm/eventlog/acpi.c b/drivers/char/tpm/eventlog/acpi.c index 7c53b1973b62..63ada5e53f13 100644 --- a/drivers/char/tpm/eventlog/acpi.c +++ b/drivers/char/tpm/eventlog/acpi.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (C) 2005 IBM Corporation * @@ -11,12 +12,6 @@ * Maintained by: <tpmdd-devel@lists.sourceforge.net> * * Access to the event log extended by the TCG BIOS of PC platform - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * */ #include <linux/seq_file.h> diff --git a/drivers/char/tpm/eventlog/common.c b/drivers/char/tpm/eventlog/common.c index 5a8720df2b51..7a0fca659b6a 100644 --- a/drivers/char/tpm/eventlog/common.c +++ b/drivers/char/tpm/eventlog/common.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (C) 2005, 2012 IBM Corporation * @@ -10,12 +11,6 @@ * Nayna Jain <nayna@linux.vnet.ibm.com> * * Access to the event log created by a system's firmware / BIOS - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * */ #include <linux/seq_file.h> diff --git a/drivers/char/tpm/eventlog/efi.c b/drivers/char/tpm/eventlog/efi.c index 3e673ab22cb4..6bb023de17f1 100644 --- a/drivers/char/tpm/eventlog/efi.c +++ b/drivers/char/tpm/eventlog/efi.c @@ -1,14 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (C) 2017 Google * * Authors: * Thiebaud Weksteen <tweek@google.com> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * */ #include <linux/efi.h> @@ -21,10 +16,13 @@ int tpm_read_log_efi(struct tpm_chip *chip) { + struct efi_tcg2_final_events_table *final_tbl = NULL; struct linux_efi_tpm_eventlog *log_tbl; struct tpm_bios_log *log; u32 log_size; u8 tpm_log_version; + void *tmp; + int ret; if (!(chip->flags & TPM_CHIP_FLAG_TPM2)) return -ENODEV; @@ -52,15 +50,57 @@ int tpm_read_log_efi(struct tpm_chip *chip) /* malloc EventLog space */ log->bios_event_log = kmemdup(log_tbl->log, log_size, GFP_KERNEL); - if (!log->bios_event_log) - goto err_memunmap; - log->bios_event_log_end = log->bios_event_log + log_size; + if (!log->bios_event_log) { + ret = -ENOMEM; + goto out; + } + log->bios_event_log_end = log->bios_event_log + log_size; tpm_log_version = log_tbl->version; - memunmap(log_tbl); - return tpm_log_version; -err_memunmap: + ret = tpm_log_version; + + if (efi.tpm_final_log == EFI_INVALID_TABLE_ADDR || + efi_tpm_final_log_size == 0 || + tpm_log_version != EFI_TCG2_EVENT_LOG_FORMAT_TCG_2) + goto out; + + final_tbl = memremap(efi.tpm_final_log, + sizeof(*final_tbl) + efi_tpm_final_log_size, + MEMREMAP_WB); + if (!final_tbl) { + pr_err("Could not map UEFI TPM final log\n"); + kfree(log->bios_event_log); + ret = -ENOMEM; + goto out; + } + + efi_tpm_final_log_size -= log_tbl->final_events_preboot_size; + + tmp = krealloc(log->bios_event_log, + log_size + efi_tpm_final_log_size, + GFP_KERNEL); + if (!tmp) { + kfree(log->bios_event_log); + ret = -ENOMEM; + goto out; + } + + log->bios_event_log = tmp; + + /* + * Copy any of the final events log that didn't also end up in the + * main log. Events can be logged in both if events are generated + * between GetEventLog() and ExitBootServices(). + */ + memcpy((void *)log->bios_event_log + log_size, + final_tbl->events + log_tbl->final_events_preboot_size, + efi_tpm_final_log_size); + log->bios_event_log_end = log->bios_event_log + + log_size + efi_tpm_final_log_size; + +out: + memunmap(final_tbl); memunmap(log_tbl); - return -ENOMEM; + return ret; } diff --git a/drivers/char/tpm/eventlog/of.c b/drivers/char/tpm/eventlog/of.c index bba5fba6cb3b..af347c190819 100644 --- a/drivers/char/tpm/eventlog/of.c +++ b/drivers/char/tpm/eventlog/of.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright 2012 IBM Corporation * @@ -7,12 +8,6 @@ * Maintained by: <tpmdd-devel@lists.sourceforge.net> * * Read the event log created by the firmware on PPC64 - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * */ #include <linux/slab.h> diff --git a/drivers/char/tpm/eventlog/tpm1.c b/drivers/char/tpm/eventlog/tpm1.c index bfdff9271be0..739b1d9d16b6 100644 --- a/drivers/char/tpm/eventlog/tpm1.c +++ b/drivers/char/tpm/eventlog/tpm1.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (C) 2005, 2012 IBM Corporation * @@ -12,12 +13,6 @@ * Maintained by: <tpmdd-devel@lists.sourceforge.net> * * Access to the event log created by a system's firmware / BIOS - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * */ #include <linux/seq_file.h> diff --git a/drivers/char/tpm/eventlog/tpm2.c b/drivers/char/tpm/eventlog/tpm2.c index f824563fc28d..b9aeda1cbcd7 100644 --- a/drivers/char/tpm/eventlog/tpm2.c +++ b/drivers/char/tpm/eventlog/tpm2.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (C) 2016 IBM Corporation * @@ -9,11 +10,6 @@ * for Family "2.0" and written the event data in little endian. * With that, it doesn't need any endian conversion for structure * content. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. */ #include <linux/seq_file.h> @@ -40,52 +36,7 @@ static size_t calc_tpm2_event_size(struct tcg_pcr_event2_head *event, struct tcg_pcr_event *event_header) { - struct tcg_efi_specid_event_head *efispecid; - struct tcg_event_field *event_field; - void *marker; - void *marker_start; - u32 halg_size; - size_t size; - u16 halg; - int i; - int j; - - marker = event; - marker_start = marker; - marker = marker + sizeof(event->pcr_idx) + sizeof(event->event_type) - + sizeof(event->count); - - efispecid = (struct tcg_efi_specid_event_head *)event_header->event; - - /* Check if event is malformed. */ - if (event->count > efispecid->num_algs) - return 0; - - for (i = 0; i < event->count; i++) { - halg_size = sizeof(event->digests[i].alg_id); - memcpy(&halg, marker, halg_size); - marker = marker + halg_size; - for (j = 0; j < efispecid->num_algs; j++) { - if (halg == efispecid->digest_sizes[j].alg_id) { - marker += - efispecid->digest_sizes[j].digest_size; - break; - } - } - /* Algorithm without known length. Such event is unparseable. */ - if (j == efispecid->num_algs) - return 0; - } - - event_field = (struct tcg_event_field *)marker; - marker = marker + sizeof(event_field->event_size) - + event_field->event_size; - size = marker - marker_start; - - if ((event->event_type == 0) && (event_field->event_size == 0)) - return 0; - - return size; + return __calc_tpm2_event_size(event, event_header, false); } static void *tpm2_bios_measurements_start(struct seq_file *m, loff_t *pos) |