Commit 1c10b4b3 authored by Christian Borntraeger's avatar Christian Borntraeger Committed by Greg Kroah-Hartman

s390/zcrypt: Fix ZCRYPT_PERDEV_REQCNT ioctl

commit f7e80983 upstream.

reqcnt is an u32 pointer but we do copy sizeof(reqcnt) which is the
size of the pointer. This means we only copy 8 byte. Let us copy
the full monty.
Signed-off-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
Cc: Harald Freudenberger <freude@linux.ibm.com>
Cc: stable@vger.kernel.org
Fixes: af4a7227 ("s390/zcrypt: Support up to 256 crypto adapters.")
Reviewed-by: default avatarHarald Freudenberger <freude@linux.ibm.com>
Signed-off-by: default avatarVasily Gorbik <gor@linux.ibm.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent f3e8ed3d
......@@ -915,7 +915,8 @@ static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
if (!reqcnt)
return -ENOMEM;
zcrypt_perdev_reqcnt(reqcnt, AP_DEVICES);
if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt)))
if (copy_to_user((int __user *) arg, reqcnt,
sizeof(u32) * AP_DEVICES))
rc = -EFAULT;
kfree(reqcnt);
return rc;
......
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