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From: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
To: linux-integrity@vger.kernel.org
Cc: linux-security-module@vger.kernel.org,
	Sahil Rihan <srihan@fb.com>, Alexei Starovoitov <ast@fb.com>,
	Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>,
	stable@vger.kernel.org, Peter Huewe <peterhuewe@gmx.de>,
	Jason Gunthorpe <jgg@ziepe.ca>, Arnd Bergmann <arnd@arndb.de>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	linux-kernel@vger.kernel.org (open list)
Subject: [PATCH] tpm: allow TCPA log area to be empty
Date: Sat, 10 Mar 2018 18:16:37 +0200	[thread overview]
Message-ID: <20180310161637.7723-1-jarkko.sakkinen@linux.intel.com> (raw)

TCPA log are can be empty when the TPM is disabled. This commit changes the
behavior of tpm_read_log_acpi() to return successfully in this case.

Cc: stable@vger.kernel.org
Fixes: 55a82ab3181b ("[PATCH] tpm: add bios measurement log")
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
---
 drivers/char/tpm/tpm_eventlog_acpi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/char/tpm/tpm_eventlog_acpi.c b/drivers/char/tpm/tpm_eventlog_acpi.c
index 66f19e93c216..f5f66dcd6f30 100644
--- a/drivers/char/tpm/tpm_eventlog_acpi.c
+++ b/drivers/char/tpm/tpm_eventlog_acpi.c
@@ -84,8 +84,8 @@ int tpm_read_log_acpi(struct tpm_chip *chip)
 		break;
 	}
 	if (!len) {
-		dev_warn(&chip->dev, "%s: TCPA log area empty\n", __func__);
-		return -EIO;
+		dev_info(&chip->dev, "TCPA log area is empty\n");
+		return 0;
 	}
 
 	/* malloc EventLog space */
-- 
2.15.1

WARNING: multiple messages have this Message-ID (diff)
From: jarkko.sakkinen@linux.intel.com (Jarkko Sakkinen)
To: linux-security-module@vger.kernel.org
Subject: [PATCH] tpm: allow TCPA log area to be empty
Date: Sat, 10 Mar 2018 18:16:37 +0200	[thread overview]
Message-ID: <20180310161637.7723-1-jarkko.sakkinen@linux.intel.com> (raw)

TCPA log are can be empty when the TPM is disabled. This commit changes the
behavior of tpm_read_log_acpi() to return successfully in this case.

Cc: stable at vger.kernel.org
Fixes: 55a82ab3181b ("[PATCH] tpm: add bios measurement log")
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
---
 drivers/char/tpm/tpm_eventlog_acpi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/char/tpm/tpm_eventlog_acpi.c b/drivers/char/tpm/tpm_eventlog_acpi.c
index 66f19e93c216..f5f66dcd6f30 100644
--- a/drivers/char/tpm/tpm_eventlog_acpi.c
+++ b/drivers/char/tpm/tpm_eventlog_acpi.c
@@ -84,8 +84,8 @@ int tpm_read_log_acpi(struct tpm_chip *chip)
 		break;
 	}
 	if (!len) {
-		dev_warn(&chip->dev, "%s: TCPA log area empty\n", __func__);
-		return -EIO;
+		dev_info(&chip->dev, "TCPA log area is empty\n");
+		return 0;
 	}
 
 	/* malloc EventLog space */
-- 
2.15.1

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             reply	other threads:[~2018-03-10 16:16 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-03-10 16:16 Jarkko Sakkinen [this message]
2018-03-10 16:16 ` [PATCH] tpm: allow TCPA log area to be empty Jarkko Sakkinen
2018-03-12 11:09 ` Jarkko Sakkinen
2018-03-12 11:09   ` Jarkko Sakkinen
2018-03-12 15:02 ` Jason Gunthorpe
2018-03-12 15:02   ` Jason Gunthorpe
2018-03-16 12:55   ` Jarkko Sakkinen
2018-03-16 12:55     ` Jarkko Sakkinen
2018-03-19  2:13     ` Jason Gunthorpe
2018-03-19  2:13       ` Jason Gunthorpe
2018-03-19 21:24       ` Jarkko Sakkinen
2018-03-19 21:24         ` Jarkko Sakkinen
2018-03-20 22:29         ` Sahil Rihan
2018-03-20 22:29           ` Sahil Rihan
2018-03-22 14:20           ` Jarkko Sakkinen
2018-03-22 14:20             ` Jarkko Sakkinen
2018-03-27  0:07             ` Sahil Rihan
2018-03-27  0:07               ` Sahil Rihan
2018-03-27  8:05               ` Jarkko Sakkinen
2018-03-27  8:05                 ` Jarkko Sakkinen
2018-03-27 15:37                 ` Sahil Rihan
2018-03-27 15:37                   ` Sahil Rihan

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