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[v2,3/3] KEYS: trusted: Fix migratable=1 failing

Message ID 20201005034948.174228-4-jarkko.sakkinen@linux.intel.com (mailing list archive)
State New
Headers show
Series [v2,1/3] KEYS: trusted: Fix incorrect handling of tpm_get_random() | expand

Commit Message

Jarkko Sakkinen Oct. 5, 2020, 3:49 a.m. UTC
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@vger.kernel.org
Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>
Cc: Mimi Zohar <zohar@linux.ibm.com>
Cc: David Howells <dhowells@redhat.com>
Fixes: d00a1c72f7f4 ("keys: add new trusted key-type")
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
 security/keys/trusted-keys/trusted_tpm1.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/security/keys/trusted-keys/trusted_tpm1.c b/security/keys/trusted-keys/trusted_tpm1.c
index c1dfc32c780b..20ca18e17437 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;
 		case Opt_pcrlock: