On Fri, 23 Dec 2016, Even Xu wrote:
[ ... snip ... ]
> +static ssize_t ishtp_cl_write(struct file *file, const char __user *ubuf,
> + size_t length, loff_t *offset)
> +{
> + struct ishtp_cl_miscdev *ishtp_cl_misc = file->private_data;
> + struct ishtp_cl *cl;
> + void *write_buf;
> + struct ishtp_device *dev;
> + int ret;
> +
> + /* Non-blocking semantics are not supported */
> + if (file->f_flags & O_NONBLOCK) {
> + ret = -EINVAL;
> + goto out_unlock;
When taking the error path here you'd try to unlock
ishtp_cl_misc->cl_mutex before actually acquiring it.
--
Jiri Kosina
SUSE Labs
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