From 8da7520c80468c48f981f0b81fc1be6599e3b0ad Mon Sep 17 00:00:00 2001
From: Jarkko Sakkinen <jarkko@kernel.org>
Date: Fri, 29 Jan 2021 01:56:20 +0200
Subject: [PATCH] KEYS: trusted: Fix migratable=1 failing
Git-commit: 8da7520c80468c48f981f0b81fc1be6599e3b0ad
Patch-mainline: v5.12-rc1
References: git-fixes

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@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 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 204826b734ac..493eb91ed017 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:
-- 
2.26.2