forge/linux-uconsole
1
0
Fork 0
Code Issues 1 Pull requests Projects Releases Packages Wiki Activity Actions

ALSA: hiface: fix multiple memory leak bugs

Browse source 
commit 3d92aa45fb upstream.

In hiface_pcm_init(), 'rt' is firstly allocated through kzalloc(). Later
on, hiface_pcm_init_urb() is invoked to initialize 'rt->out_urbs[i]'. In
hiface_pcm_init_urb(), 'rt->out_urbs[i].buffer' is allocated through
kzalloc().  However, if hiface_pcm_init_urb() fails, both 'rt' and
'rt->out_urbs[i].buffer' are not deallocated, leading to memory leak bugs.
Also, 'rt->out_urbs[i].buffer' is not deallocated if snd_pcm_new() fails.

To fix the above issues, free 'rt' and 'rt->out_urbs[i].buffer'.

Fixes: a91c3fb2f8 ("Add M2Tech hiFace USB-SPDIF driver")
Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Wenwen Wang 2019-08-07 04:08:51 -05:00 • committed by Greg Kroah-Hartman
commit 1c286e4e13
1 changed files with 8 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

11
sound/usb/hiface/pcm.c
View file

@ -604,14 +604,13 @@ int hiface_pcm_init(struct hiface_chip *chip, u8 extra_freq)
ret = hiface_pcm_init_urb(&rt->out_urbs[i], chip, OUT_EP,
hiface_pcm_out_urb_handler);
if (ret < 0)
return ret;
goto error;
}
ret = snd_pcm_new(chip->card, "USB-SPDIF Audio", 0, 1, 0, &pcm);
if (ret < 0) {
kfree(rt);
dev_err(&chip->dev->dev, "Cannot create pcm instance\n");
return ret;
goto error;
}
pcm->private_data = rt;
@ -624,4 +623,10 @@ int hiface_pcm_init(struct hiface_chip *chip, u8 extra_freq)
chip->pcm = rt;
return 0;
error:
for (i = 0; i < PCM_N_URBS; i++)
kfree(rt->out_urbs[i].buffer);
kfree(rt);
return ret;
}