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ALSA: usx2y: Fix potential NULL pointer dereference

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usb_alloc_urb() can fail due to kmalloc failure and push the error
upstream. Further this can cause a NULL pointer dereference in
init_pipe_urbs(). This patch avoids such a scenario.

Signed-off-by: Aditya Pakki <pakki001@umn.edu>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Aditya Pakki 2019-03-04 17:00:02 -06:00 committed by Takashi Iwai
parent d344e07940
commit a2c6433ee5
1 changed files with 5 additions and 0 deletions
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5
sound/usb/usx2y/usb_stream.c
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@ -104,7 +104,12 @@ static int init_urbs(struct usb_stream_kernel *sk, unsigned use_packsize,
for (u = 0; u < USB_STREAM_NURBS; ++u) { for (u = 0; u < USB_STREAM_NURBS; ++u) {
sk->inurb[u] = usb_alloc_urb(sk->n_o_ps, GFP_KERNEL); sk->inurb[u] = usb_alloc_urb(sk->n_o_ps, GFP_KERNEL);
if (!sk->inurb[u])
return -ENOMEM;
sk->outurb[u] = usb_alloc_urb(sk->n_o_ps, GFP_KERNEL); sk->outurb[u] = usb_alloc_urb(sk->n_o_ps, GFP_KERNEL);
if (!sk->outurb[u])
return -ENOMEM;
} }
if (init_pipe_urbs(sk, use_packsize, sk->inurb, indata, dev, in_pipe) || if (init_pipe_urbs(sk, use_packsize, sk->inurb, indata, dev, in_pipe) ||