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s390/zcrypt: Fix ZCRYPT_PERDEV_REQCNT ioctl
commitf7e80983f0
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: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Harald Freudenberger <freude@linux.ibm.com> Cc: stable@vger.kernel.org Fixes:af4a72276d
("s390/zcrypt: Support up to 256 crypto adapters.") Reviewed-by: Harald Freudenberger <freude@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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1 changed files with 2 additions and 1 deletions
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@ -1419,7 +1419,8 @@ static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
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if (!reqcnt)
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return -ENOMEM;
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zcrypt_perdev_reqcnt(reqcnt, AP_DEVICES);
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if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt)))
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if (copy_to_user((int __user *) arg, reqcnt,
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sizeof(u32) * AP_DEVICES))
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rc = -EFAULT;
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kfree(reqcnt);
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return rc;
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