s390/pkey: fix missing length of protected key on return

commit aab73d278d49c718b722ff5052e16c9cddf144d4 upstream.

The pkey ioctl call PKEY_SEC2PROTK updates a struct pkey_protkey
on return. The protected key is stored in, the protected key type
is stored in but the len information was not updated. This patch
now fixes this and so the len field gets an update to refrect
the actual size of the protected key value returned.

Fixes: efc598e6c8a9 ("s390/zcrypt: move cca misc functions to new code file")
Cc: Stable <stable@vger.kernel.org>
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reported-by: Christian Rund <RUNDC@de.ibm.com>
Suggested-by: Ingo Franzki <ifranzki@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/s390/crypto/pkey_api.c b/drivers/s390/crypto/pkey_api.c
index d78d77686d7bc3b49c302705912824809198f1be..cda75118ccdb7e4e0c13a190ffb9e12fdf570a37 100644 (file)
--- a/drivers/s390/crypto/pkey_api.c
+++ b/drivers/s390/crypto/pkey_api.c
@@ -774,7 +774,7 @@ static long pkey_unlocked_ioctl(struct file *filp, unsigned int cmd,
                        return -EFAULT;
                rc = cca_sec2protkey(ksp.cardnr, ksp.domain,
                                     ksp.seckey.seckey, ksp.protkey.protkey,
-                                    NULL, &ksp.protkey.type);
+                                    &ksp.protkey.len, &ksp.protkey.type);
                DEBUG_DBG("%s cca_sec2protkey()=%d\n", __func__, rc);
                if (rc)
                        break;