tpm: Return tpm2_sessions_init() when null key creation fails

Do not continue tpm2_sessions_init() further if the null key pair creation
fails.

Cc: stable@vger.kernel.org # v6.10+
Fixes: d2add27cf2b8 ("tpm: Add NULL primary creation")
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>

diff --git a/drivers/char/tpm/tpm2-sessions.c b/drivers/char/tpm/tpm2-sessions.c
index 511c670..bb7b94b 100644 (file)
--- a/drivers/char/tpm/tpm2-sessions.c
+++ b/drivers/char/tpm/tpm2-sessions.c
@@ -1347,14 +1347,21 @@ static int tpm2_create_null_primary(struct tpm_chip *chip)
  *
  * Derive and context save the null primary and allocate memory in the
  * struct tpm_chip for the authorizations.
+ *
+ * Return:
+ * * 0         - OK
+ * * -errno    - A system error
+ * * TPM_RC    - A TPM error
  */
 int tpm2_sessions_init(struct tpm_chip *chip)
 {
        int rc;
 
        rc = tpm2_create_null_primary(chip);
-       if (rc)
-               dev_err(&chip->dev, "TPM: security failed (NULL seed derivation): %d\n", rc);
+       if (rc) {
+               dev_err(&chip->dev, "null key creation failed with %d\n", rc);
+               return rc;
+       }
 
        chip->auth = kmalloc(sizeof(*chip->auth), GFP_KERNEL);
        if (!chip->auth)