cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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seq_compat.c (4007B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 *   32bit -> 64bit ioctl wrapper for sequencer API
      4 *   Copyright (c) by Takashi Iwai <tiwai@suse.de>
      5 */
      6
      7/* This file included from seq.c */
      8
      9#include <linux/compat.h>
     10#include <linux/slab.h>
     11
     12struct snd_seq_port_info32 {
     13	struct snd_seq_addr addr;	/* client/port numbers */
     14	char name[64];			/* port name */
     15
     16	u32 capability;	/* port capability bits */
     17	u32 type;		/* port type bits */
     18	s32 midi_channels;		/* channels per MIDI port */
     19	s32 midi_voices;		/* voices per MIDI port */
     20	s32 synth_voices;		/* voices per SYNTH port */
     21
     22	s32 read_use;			/* R/O: subscribers for output (from this port) */
     23	s32 write_use;			/* R/O: subscribers for input (to this port) */
     24
     25	u32 kernel;			/* reserved for kernel use (must be NULL) */
     26	u32 flags;		/* misc. conditioning */
     27	unsigned char time_queue;	/* queue # for timestamping */
     28	char reserved[59];		/* for future use */
     29};
     30
     31static int snd_seq_call_port_info_ioctl(struct snd_seq_client *client, unsigned int cmd,
     32					struct snd_seq_port_info32 __user *data32)
     33{
     34	int err = -EFAULT;
     35	struct snd_seq_port_info *data;
     36
     37	data = kmalloc(sizeof(*data), GFP_KERNEL);
     38	if (!data)
     39		return -ENOMEM;
     40
     41	if (copy_from_user(data, data32, sizeof(*data32)) ||
     42	    get_user(data->flags, &data32->flags) ||
     43	    get_user(data->time_queue, &data32->time_queue))
     44		goto error;
     45	data->kernel = NULL;
     46
     47	err = snd_seq_kernel_client_ctl(client->number, cmd, data);
     48	if (err < 0)
     49		goto error;
     50
     51	if (copy_to_user(data32, data, sizeof(*data32)) ||
     52	    put_user(data->flags, &data32->flags) ||
     53	    put_user(data->time_queue, &data32->time_queue))
     54		err = -EFAULT;
     55
     56 error:
     57	kfree(data);
     58	return err;
     59}
     60
     61
     62
     63/*
     64 */
     65
     66enum {
     67	SNDRV_SEQ_IOCTL_CREATE_PORT32 = _IOWR('S', 0x20, struct snd_seq_port_info32),
     68	SNDRV_SEQ_IOCTL_DELETE_PORT32 = _IOW ('S', 0x21, struct snd_seq_port_info32),
     69	SNDRV_SEQ_IOCTL_GET_PORT_INFO32 = _IOWR('S', 0x22, struct snd_seq_port_info32),
     70	SNDRV_SEQ_IOCTL_SET_PORT_INFO32 = _IOW ('S', 0x23, struct snd_seq_port_info32),
     71	SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT32 = _IOWR('S', 0x52, struct snd_seq_port_info32),
     72};
     73
     74static long snd_seq_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
     75{
     76	struct snd_seq_client *client = file->private_data;
     77	void __user *argp = compat_ptr(arg);
     78
     79	if (snd_BUG_ON(!client))
     80		return -ENXIO;
     81
     82	switch (cmd) {
     83	case SNDRV_SEQ_IOCTL_PVERSION:
     84	case SNDRV_SEQ_IOCTL_CLIENT_ID:
     85	case SNDRV_SEQ_IOCTL_SYSTEM_INFO:
     86	case SNDRV_SEQ_IOCTL_GET_CLIENT_INFO:
     87	case SNDRV_SEQ_IOCTL_SET_CLIENT_INFO:
     88	case SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT:
     89	case SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT:
     90	case SNDRV_SEQ_IOCTL_CREATE_QUEUE:
     91	case SNDRV_SEQ_IOCTL_DELETE_QUEUE:
     92	case SNDRV_SEQ_IOCTL_GET_QUEUE_INFO:
     93	case SNDRV_SEQ_IOCTL_SET_QUEUE_INFO:
     94	case SNDRV_SEQ_IOCTL_GET_NAMED_QUEUE:
     95	case SNDRV_SEQ_IOCTL_GET_QUEUE_STATUS:
     96	case SNDRV_SEQ_IOCTL_GET_QUEUE_TEMPO:
     97	case SNDRV_SEQ_IOCTL_SET_QUEUE_TEMPO:
     98	case SNDRV_SEQ_IOCTL_GET_QUEUE_TIMER:
     99	case SNDRV_SEQ_IOCTL_SET_QUEUE_TIMER:
    100	case SNDRV_SEQ_IOCTL_GET_QUEUE_CLIENT:
    101	case SNDRV_SEQ_IOCTL_SET_QUEUE_CLIENT:
    102	case SNDRV_SEQ_IOCTL_GET_CLIENT_POOL:
    103	case SNDRV_SEQ_IOCTL_SET_CLIENT_POOL:
    104	case SNDRV_SEQ_IOCTL_REMOVE_EVENTS:
    105	case SNDRV_SEQ_IOCTL_QUERY_SUBS:
    106	case SNDRV_SEQ_IOCTL_GET_SUBSCRIPTION:
    107	case SNDRV_SEQ_IOCTL_QUERY_NEXT_CLIENT:
    108	case SNDRV_SEQ_IOCTL_RUNNING_MODE:
    109		return snd_seq_ioctl(file, cmd, arg);
    110	case SNDRV_SEQ_IOCTL_CREATE_PORT32:
    111		return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_CREATE_PORT, argp);
    112	case SNDRV_SEQ_IOCTL_DELETE_PORT32:
    113		return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_DELETE_PORT, argp);
    114	case SNDRV_SEQ_IOCTL_GET_PORT_INFO32:
    115		return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_GET_PORT_INFO, argp);
    116	case SNDRV_SEQ_IOCTL_SET_PORT_INFO32:
    117		return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_SET_PORT_INFO, argp);
    118	case SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT32:
    119		return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT, argp);
    120	}
    121	return -ENOIOCTLCMD;
    122}