linux-kernel - [PATCH 5.10 1/1] staging: rtl8192u: Add null check in rtl8192_usb

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Date:   Thu, 30 Mar 2023 20:11:07 +0000
From:   Danila Chernetsov <listdansp@...l.ru>
To:     stable@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Danila Chernetsov <listdansp@...l.ru>,
        Dinghao Liu <dinghao.liu@....edu.cn>,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org,
        lvc-project@...uxtesting.org
Subject: [PATCH 5.10 1/1] staging: rtl8192u: Add null check in rtl8192_usb_initendpoints

From: Dinghao Liu <dinghao.liu@....edu.cn>

commit 4d5f81506835f7c1e5c71787bed84984faf05884 upstream.

There is an allocation for priv->rx_urb[16] has no null check,
which may lead to a null pointer dereference.

Signed-off-by: Dinghao Liu <dinghao.liu@....edu.cn>
Link: https://lore.kernel.org/r/20201226080258.6576-1-dinghao.liu@zju.edu.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Danila Chernetsov <listdansp@...l.ru>
---
 drivers/staging/rtl8192u/r8192U_core.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/staging/rtl8192u/r8192U_core.c b/drivers/staging/rtl8192u/r8192U_core.c
index 7f90af8a7c7c..e0fec7d172da 100644
--- a/drivers/staging/rtl8192u/r8192U_core.c
+++ b/drivers/staging/rtl8192u/r8192U_core.c
@@ -1608,6 +1608,8 @@ static short rtl8192_usb_initendpoints(struct net_device *dev)
 		void *oldaddr, *newaddr;
 
 		priv->rx_urb[16] = usb_alloc_urb(0, GFP_KERNEL);
+		if (!priv->rx_urb[16])
+			return -ENOMEM;
 		priv->oldaddr = kmalloc(16, GFP_KERNEL);
 		if (!priv->oldaddr)
 			return -ENOMEM;
-- 
2.25.1