[PATCH 5.12 292/296] Revert "Revert "ALSA: usx2y: Fix potential NULL pointer dereference""

Greg Kroah-Hartman
2021-05-31T16:54:44Z

From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

commit 27b57bb76a897be80494ee11ee4e85326d19383d upstream.

This reverts commit 4667a6fc1777ce071504bab570d3599107f4790f.

Takashi writes:
I have already started working on the bigger cleanup of this driver
code based on 5.13-rc1, so could you drop this revert?

I missed our previous discussion about this, my fault for applying it.

Reported-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
sound/usb/usx2y/usb_stream.c | 5 +++++
1 file changed, 5 insertions(+)

--- a/sound/usb/usx2y/usb_stream.c
+++ b/sound/usb/usx2y/usb_stream.c
@@ -91,7 +91,12 @@ static int init_urbs(struct usb_stream_k

for (u = 0; u < USB_STREAM_NURBS; ++u) {
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);
+ if (!sk->outurb[u])
+ return -ENOMEM;
}

if (init_pipe_urbs(sk, use_packsize, sk->inurb, indata, dev, in_pipe) ||