diff options
| -rw-r--r-- | sound/usb/quirks.c | 4 | ||||
| -rw-r--r-- | sound/usb/stream.c | 6 |
2 files changed, 9 insertions, 1 deletions
diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c index 7db8f4fa4..87346fd73 100644 --- a/sound/usb/quirks.c +++ b/sound/usb/quirks.c @@ -136,6 +136,7 @@ static int create_fixed_stream_quirk(struct snd_usb_audio *chip, snd_printk(KERN_ERR "cannot memdup\n"); return -ENOMEM; } + INIT_LIST_HEAD(&fp->list); if (fp->nr_rates > MAX_NR_RATES) { kfree(fp); return -EINVAL; @@ -171,6 +172,7 @@ static int create_fixed_stream_quirk(struct snd_usb_audio *chip, return 0; error: + list_del(&fp->list); /* unlink for avoiding double-free */ kfree(fp); kfree(rate_table); return err; @@ -240,6 +242,7 @@ static int create_uaxx_quirk(struct snd_usb_audio *chip, fp->ep_attr = get_endpoint(alts, 0)->bmAttributes; fp->datainterval = 0; fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize); + INIT_LIST_HEAD(&fp->list); switch (fp->maxpacksize) { case 0x120: @@ -263,6 +266,7 @@ static int create_uaxx_quirk(struct snd_usb_audio *chip, ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK; err = snd_usb_add_audio_stream(chip, stream, fp); if (err < 0) { + list_del(&fp->list); /* unlink for avoiding double-free */ kfree(fp); return err; } diff --git a/sound/usb/stream.c b/sound/usb/stream.c index 7db2f8958..97e678ba1 100644 --- a/sound/usb/stream.c +++ b/sound/usb/stream.c @@ -307,7 +307,9 @@ static struct snd_pcm_chmap_elem *convert_chmap(int channels, unsigned int bits, /* * add this endpoint to the chip instance. * if a stream with the same endpoint already exists, append to it. - * if not, create a new pcm stream. + * if not, create a new pcm stream. note, fp is added to the substream + * fmt_list and will be freed on the chip instance release. do not free + * fp or do remove it from the substream fmt_list to avoid double-free. */ int snd_usb_add_audio_stream(struct snd_usb_audio *chip, int stream, @@ -643,6 +645,7 @@ int snd_usb_parse_audio_interface(struct snd_usb_audio *chip, int iface_no) fp->attributes = parse_uac_endpoint_attributes(chip, alts, protocol, iface_no); fp->clock = clock; fp->chmap = convert_chmap(num_channels, chconfig, protocol); + INIT_LIST_HEAD(&fp->list); /* some quirks for attributes here */ @@ -687,6 +690,7 @@ int snd_usb_parse_audio_interface(struct snd_usb_audio *chip, int iface_no) snd_printdd(KERN_INFO "%d:%u:%d: add audio endpoint %#x\n", dev->devnum, iface_no, altno, fp->endpoint); err = snd_usb_add_audio_stream(chip, stream, fp); if (err < 0) { + list_del(&fp->list); /* unlink for avoiding double-free */ kfree(fp->rate_table); kfree(fp->chmap); kfree(fp); |