8866f405ef
A malicious USB device could feed in a large nr_rates value. This would
cause the subsequent call to kmemdup() to allocate a smaller buffer than
expected, leading to out-of-bounds access.
This patch validates the nr_rates value and reuses the limit introduced
in commit 4fa0e81b ("ALSA: usb-audio: fix possible hang and overflow
in parse_uac2_sample_rate_range()").
Signed-off-by: Xi Wang <xi.wang@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
111 lines
4.8 KiB
C
111 lines
4.8 KiB
C
#ifndef __USBAUDIO_CARD_H
|
|
#define __USBAUDIO_CARD_H
|
|
|
|
#define MAX_NR_RATES 1024
|
|
#define MAX_PACKS 20
|
|
#define MAX_PACKS_HS (MAX_PACKS * 8) /* in high speed mode */
|
|
#define MAX_URBS 8
|
|
#define SYNC_URBS 4 /* always four urbs for sync */
|
|
#define MAX_QUEUE 24 /* try not to exceed this queue length, in ms */
|
|
|
|
struct audioformat {
|
|
struct list_head list;
|
|
u64 formats; /* ALSA format bits */
|
|
unsigned int channels; /* # channels */
|
|
unsigned int fmt_type; /* USB audio format type (1-3) */
|
|
unsigned int frame_size; /* samples per frame for non-audio */
|
|
int iface; /* interface number */
|
|
unsigned char altsetting; /* corresponding alternate setting */
|
|
unsigned char altset_idx; /* array index of altenate setting */
|
|
unsigned char attributes; /* corresponding attributes of cs endpoint */
|
|
unsigned char endpoint; /* endpoint */
|
|
unsigned char ep_attr; /* endpoint attributes */
|
|
unsigned char datainterval; /* log_2 of data packet interval */
|
|
unsigned int maxpacksize; /* max. packet size */
|
|
unsigned int rates; /* rate bitmasks */
|
|
unsigned int rate_min, rate_max; /* min/max rates */
|
|
unsigned int nr_rates; /* number of rate table entries */
|
|
unsigned int *rate_table; /* rate table */
|
|
unsigned char clock; /* associated clock */
|
|
};
|
|
|
|
struct snd_usb_substream;
|
|
|
|
struct snd_urb_ctx {
|
|
struct urb *urb;
|
|
unsigned int buffer_size; /* size of data buffer, if data URB */
|
|
struct snd_usb_substream *subs;
|
|
int index; /* index for urb array */
|
|
int packets; /* number of packets per urb */
|
|
};
|
|
|
|
struct snd_urb_ops {
|
|
int (*prepare)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
|
|
int (*retire)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
|
|
int (*prepare_sync)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
|
|
int (*retire_sync)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
|
|
};
|
|
|
|
struct snd_usb_substream {
|
|
struct snd_usb_stream *stream;
|
|
struct usb_device *dev;
|
|
struct snd_pcm_substream *pcm_substream;
|
|
int direction; /* playback or capture */
|
|
int interface; /* current interface */
|
|
int endpoint; /* assigned endpoint */
|
|
struct audioformat *cur_audiofmt; /* current audioformat pointer (for hw_params callback) */
|
|
unsigned int cur_rate; /* current rate (for hw_params callback) */
|
|
unsigned int period_bytes; /* current period bytes (for hw_params callback) */
|
|
unsigned int altset_idx; /* USB data format: index of alternate setting */
|
|
unsigned int datapipe; /* the data i/o pipe */
|
|
unsigned int syncpipe; /* 1 - async out or adaptive in */
|
|
unsigned int datainterval; /* log_2 of data packet interval */
|
|
unsigned int syncinterval; /* P for adaptive mode, 0 otherwise */
|
|
unsigned int freqn; /* nominal sampling rate in fs/fps in Q16.16 format */
|
|
unsigned int freqm; /* momentary sampling rate in fs/fps in Q16.16 format */
|
|
int freqshift; /* how much to shift the feedback value to get Q16.16 */
|
|
unsigned int freqmax; /* maximum sampling rate, used for buffer management */
|
|
unsigned int phase; /* phase accumulator */
|
|
unsigned int maxpacksize; /* max packet size in bytes */
|
|
unsigned int maxframesize; /* max packet size in frames */
|
|
unsigned int curpacksize; /* current packet size in bytes (for capture) */
|
|
unsigned int curframesize; /* current packet size in frames (for capture) */
|
|
unsigned int syncmaxsize; /* sync endpoint packet size */
|
|
unsigned int fill_max: 1; /* fill max packet size always */
|
|
unsigned int txfr_quirk:1; /* allow sub-frame alignment */
|
|
unsigned int fmt_type; /* USB audio format type (1-3) */
|
|
|
|
unsigned int running: 1; /* running status */
|
|
|
|
unsigned int hwptr_done; /* processed byte position in the buffer */
|
|
unsigned int transfer_done; /* processed frames since last period update */
|
|
unsigned long active_mask; /* bitmask of active urbs */
|
|
unsigned long unlink_mask; /* bitmask of unlinked urbs */
|
|
|
|
unsigned int nurbs; /* # urbs */
|
|
struct snd_urb_ctx dataurb[MAX_URBS]; /* data urb table */
|
|
struct snd_urb_ctx syncurb[SYNC_URBS]; /* sync urb table */
|
|
char *syncbuf; /* sync buffer for all sync URBs */
|
|
dma_addr_t sync_dma; /* DMA address of syncbuf */
|
|
|
|
u64 formats; /* format bitmasks (all or'ed) */
|
|
unsigned int num_formats; /* number of supported audio formats (list) */
|
|
struct list_head fmt_list; /* format list */
|
|
struct snd_pcm_hw_constraint_list rate_list; /* limited rates */
|
|
spinlock_t lock;
|
|
|
|
struct snd_urb_ops ops; /* callbacks (must be filled at init) */
|
|
int last_frame_number; /* stored frame number */
|
|
int last_delay; /* stored delay */
|
|
};
|
|
|
|
struct snd_usb_stream {
|
|
struct snd_usb_audio *chip;
|
|
struct snd_pcm *pcm;
|
|
int pcm_index;
|
|
unsigned int fmt_type; /* USB audio format type (1-3) */
|
|
struct snd_usb_substream substream[2];
|
|
struct list_head list;
|
|
};
|
|
|
|
#endif /* __USBAUDIO_CARD_H */
|