linux-kernel - [PATCH] ALSA: scarlett2: Fix a potential memory leak in scarlett2_init

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Message-Id: <73aab53d53df156a5df2bc61314ff26448526749.1693744859.git.christophe.jaillet@wanadoo.fr>
Date:   Sun,  3 Sep 2023 14:41:45 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     "Geoffrey D. Bennett" <g@...vu>, Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>
Cc:     linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        Takashi Iwai <tiwai@...e.de>, alsa-devel@...a-project.org
Subject: [PATCH] ALSA: scarlett2: Fix a potential memory leak in scarlett2_init_notify()

If kmalloc() fails, we should release 'mixer->urb'.

Fixes: 9e4d5c1be21f ("ALSA: usb-audio: Scarlett Gen 2 mixer interface")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
 sound/usb/mixer_scarlett_gen2.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sound/usb/mixer_scarlett_gen2.c b/sound/usb/mixer_scarlett_gen2.c
index 9d11bb08667e..a439c7f64b2e 100644
--- a/sound/usb/mixer_scarlett_gen2.c
+++ b/sound/usb/mixer_scarlett_gen2.c
@@ -4060,8 +4060,10 @@ static int scarlett2_init_notify(struct usb_mixer_interface *mixer)
 		return -ENOMEM;
 
 	transfer_buffer = kmalloc(private->wMaxPacketSize, GFP_KERNEL);
-	if (!transfer_buffer)
+	if (!transfer_buffer) {
+		usb_free_urb(mixer->urb);
 		return -ENOMEM;
+	}
 
 	usb_fill_int_urb(mixer->urb, dev, pipe,
 			 transfer_buffer, private->wMaxPacketSize,
-- 
2.34.1