linux-kernel - [PATCH v4 2/3,RESEND 2] KEYS: trusted: Fix migratable=1 failing

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <20201104011849.GC20387@kernel.org>
Date:   Wed, 4 Nov 2020 03:18:49 +0200
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     linux-integrity@...r.kernel.org
Cc:     David Howells <dhowells@...hat.com>,
        Mimi Zohar <zohar@...ux.ibm.com>,
        James Bottomley <jejb@...ux.ibm.com>,
        Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
        stable@...r.kernel.org, James Morris <jmorris@...ei.org>,
        "Serge E. Hallyn" <serge@...lyn.com>,
        David Safford <safford@...son.ibm.com>,
        "open list:KEYS-TRUSTED" <keyrings@...r.kernel.org>,
        "open list:SECURITY SUBSYSTEM" 
        <linux-security-module@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: [PATCH v4 2/3,RESEND 2] KEYS: trusted: Fix migratable=1 failing

Consider the following transcript:

$ keyctl add trusted kmk "new 32 blobauth=helloworld keyhandle=80000000 migratable=1" @u
add_key: Invalid argument

The documentation has the following description:

  migratable=   0|1 indicating permission to reseal to new PCR values,
                default 1 (resealing allowed)

The consequence is that "migratable=1" should succeed. Fix this by
allowing this condition to pass instead of return -EINVAL.

[*] Documentation/security/keys/trusted-encrypted.rst

Cc: stable@...r.kernel.org
Cc: "James E.J. Bottomley" <jejb@...ux.ibm.com>
Cc: Mimi Zohar <zohar@...ux.ibm.com>
Cc: David Howells <dhowells@...hat.com>
Fixes: d00a1c72f7f4 ("keys: add new trusted key-type")
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
---
 security/keys/trusted-keys/trusted_tpm1.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/security/keys/trusted-keys/trusted_tpm1.c b/security/keys/trusted-keys/trusted_tpm1.c
index c7b1701cdac5..7a937c3c5283 100644
--- a/security/keys/trusted-keys/trusted_tpm1.c
+++ b/security/keys/trusted-keys/trusted_tpm1.c
@@ -801,7 +801,7 @@ static int getoptions(char *c, struct trusted_key_payload *pay,
 		case Opt_migratable:
 			if (*args[0].from == '0')
 				pay->migratable = 0;
-			else
+			else if (*args[0].from != '1')
 				return -EINVAL;
 			break;
 		case Opt_pcrlock:
-- 
2.25.1