Given the following code containing errors, provide Common Weakness Enumeration (CWE) identifiers and corresponding messages in JSON format. Each identified weakness should have a unique entry in the JSON array.
    Code: static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream,
				      const unsigned char __user *userbuf,
				      const unsigned char *kernelbuf,
				      long count)
{
	unsigned long flags;
	long count1, result;
	struct snd_rawmidi_runtime *runtime = substream->runtime;
	unsigned long appl_ptr;

	if (!kernelbuf && !userbuf)
		return -EINVAL;
	if (snd_BUG_ON(!runtime->buffer))
		return -EINVAL;

	result = 0;
	spin_lock_irqsave(&runtime->lock, flags);
	if (substream->append) {
		if ((long)runtime->avail < count) {
			spin_unlock_irqrestore(&runtime->lock, flags);
			return -EAGAIN;
		}
	}
	while (count > 0 && runtime->avail > 0) {
		count1 = runtime->buffer_size - runtime->appl_ptr;
		if (count1 > count)
			count1 = count;
		if (count1 > (long)runtime->avail)
			count1 = runtime->avail;

		/* update runtime->appl_ptr before unlocking for userbuf */
		appl_ptr = runtime->appl_ptr;
		runtime->appl_ptr += count1;
		runtime->appl_ptr %= runtime->buffer_size;
		runtime->avail -= count1;

		if (kernelbuf)
			memcpy(runtime->buffer + appl_ptr,
			       kernelbuf + result, count1);
		else if (userbuf) {
			spin_unlock_irqrestore(&runtime->lock, flags);
			if (copy_from_user(runtime->buffer + appl_ptr,
					   userbuf + result, count1)) {
				spin_lock_irqsave(&runtime->lock, flags);
				result = result > 0 ? result : -EFAULT;
				goto __end;
			}
			spin_lock_irqsave(&runtime->lock, flags);
		}
		result += count1;
		count -= count1;
	}
      __end:
	count1 = runtime->avail < runtime->buffer_size;
	spin_unlock_irqrestore(&runtime->lock, flags);
	if (count1)
		snd_rawmidi_output_trigger(substream, 1);
	return result;
} ; Sample JSON Format Confermily Expected output: "examples" => "cwe": "xxx"; "message": "xxx"
    
 'cwe': ['CWE-416'], 'message': 'ALSA: rawmidi: Fix racy buffer resize under concurrent accesses

The rawmidi core allows user to resize the runtime buffer via ioctl,
and this may lead to UAF when performed during concurrent reads or
writes: the read/write functions unlock the runtime lock temporarily
during copying form/to user-space, and that's the race window.

This patch fixes the hole by introducing a reference counter for the
runtime buffer read/write access and returns -EBUSY error when the
resize is performed concurrently against read/write.

Note that the ref count field is a simple integer instead of
refcount_t here, since the all contexts accessing the buffer is
basically protected with a spinlock, hence we need no expensive atomic
ops.  Also, note that this busy check is needed only against read /
write functions, and not in receive/transmit callbacks; the race can
happen only at the spinlock hole mentioned in the above, while the
whole function is protected for receive / transmit callbacks.

Reported-by: butt3rflyh4ck <butterflyhuangxx@gmail.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/CAFcO6XMWpUVK_yzzCpp8_XP7+=oUpQvuBeCbMffEDkpe8jWrfg@mail.gmail.com
Link: https://lore.kernel.org/r/s5heerw3r5z.wl-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>'