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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Takashi Iwai <tiwai@suse.de>
Subject: [PATCH 5.4 174/177] Revert "Revert "ALSA: usx2y: Fix potential NULL pointer dereference""
Date:   Mon, 31 May 2021 15:15:31 +0200
Message-Id: <20210531130653.944213090@linuxfoundation.org>
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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) ||