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ALSA: line6: Fix memory leak at line6_init_pcm() error path

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commit 1bc8d18c75fef3b478dbdfef722aae09e2a9fde7 upstream.

I forgot to release the allocated object at the early error path in
line6_init_pcm().  For addressing it, slightly shuffle the code so
that the PCM destructor (pcm->private_free) is assigned properly
before all error paths.

Fixes: 3450121997ce ("ALSA: line6: Fix write on zero-sized buffer")
Signed-off-by: Takashi Iwai <tiwai@suse.de>
[bwh: Backported to 4.4: adjust context]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Takashi Iwai 2019-08-21 20:00:02 +02:00 committed by Greg Kroah-Hartman
parent 81b83ca3e4
commit 03a630fc2e
1 changed files with 9 additions and 9 deletions
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18
sound/usb/line6/pcm.c
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@ -523,6 +523,15 @@ int line6_init_pcm(struct usb_line6 *line6,
line6pcm->volume_monitor = 255;
line6pcm->line6 = line6;
spin_lock_init(&line6pcm->out.lock);
spin_lock_init(&line6pcm->in.lock);
line6pcm->impulse_period = LINE6_IMPULSE_DEFAULT_PERIOD;
line6->line6pcm = line6pcm;
pcm->private_data = line6pcm;
pcm->private_free = line6_cleanup_pcm;
/* Read and write buffers are sized identically, so choose minimum */
line6pcm->max_packet_size = min(
usb_maxpacket(line6->usbdev,
@ -535,15 +544,6 @@ int line6_init_pcm(struct usb_line6 *line6,
return -EINVAL;
}
spin_lock_init(&line6pcm->out.lock);
spin_lock_init(&line6pcm->in.lock);
line6pcm->impulse_period = LINE6_IMPULSE_DEFAULT_PERIOD;
line6->line6pcm = line6pcm;
pcm->private_data = line6pcm;
pcm->private_free = line6_cleanup_pcm;
err = line6_create_audio_out_urbs(line6pcm);
if (err < 0)
return err;