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s390/zcrypt: use kvmalloc_array() instead of kzalloc() 

zcrypt_unlocked_ioctl() allocates 256k with kzalloc() which is likely to
fail if memory is fragmented. To avoid that use kvmalloc_array() instead,
like it is done at several other places for the same reason.

Reviewed-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
This commit is contained in:
Heiko Carstens 2023-06-21 10:31:23 +02:00 committed by Alexander Gordeev
parent 0dd0bbc200
commit 13cf06d57f
1 changed files with 4 additions and 2 deletions
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6
drivers/s390/crypto/zcrypt_api.c
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@ -1668,14 +1668,16 @@ static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd,
size_t total_size = MAX_ZDEV_ENTRIES_EXT
* sizeof(struct zcrypt_device_status_ext);
device_status = kzalloc(total_size, GFP_KERNEL);
device_status = kvmalloc_array(MAX_ZDEV_ENTRIES_EXT,
sizeof(struct zcrypt_device_status_ext),
GFP_KERNEL);
if (!device_status)
return -ENOMEM;
zcrypt_device_status_mask_ext(device_status);
if (copy_to_user((char __user *)arg, device_status,
total_size))
rc = -EFAULT;
kfree(device_status);
kvfree(device_status);
return rc;
}
case ZCRYPT_STATUS_MASK: {