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Commit b0035964 authored by Olaf Hering's avatar Olaf Hering Committed by Greg Kroah-Hartman
Browse files

Drivers: hv: utils: use memdup_user in hvt_op_write 



Use memdup_user to handle OOM.

Fixes: 14b50f80 ('Drivers: hv: util: introduce hv_utils_transport abstraction')

Signed-off-by: default avatarOlaf Hering <olaf@aepfle.de>
Signed-off-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent cdc0c0c9

drivers/hv/hv_utils_transport.c

+4 −5
Original line number Diff line number Diff line
@@ -80,11 +80,10 @@ static ssize_t hvt_op_write(struct file *file, const char __user *buf, 


	hvt = container_of(file->f_op, struct hvutil_transport, fops);



	inmsg = kzalloc(count, GFP_KERNEL);

	if (copy_from_user(inmsg, buf, count)) {

		kfree(inmsg);

		return -EFAULT;

	}

	inmsg = memdup_user(buf, count);

	if (IS_ERR(inmsg))

		return PTR_ERR(inmsg);



	if (hvt->on_msg(inmsg, count))

		return -EFAULT;

	kfree(inmsg);