linux-kernel - [PATCH] can: etas_es58x: Add check for alloc_can_err

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Date:   Fri,  1 Sep 2023 16:27:55 +0800
From:   Jiasheng Jiang <jiasheng@...as.ac.cn>
To:     mailhol.vincent@...adoo.fr, wg@...ndegger.com, mkl@...gutronix.de,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, arunachalam.santhanam@...bosch.com
Cc:     linux-can@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, Jiasheng Jiang <jiasheng@...as.ac.cn>
Subject: [PATCH] can: etas_es58x: Add check for alloc_can_err_skb

Add check for the return value of alloc_can_err_skb in order to
avoid NULL pointer dereference.

Fixes: 8537257874e9 ("can: etas_es58x: add core support for ETAS ES58X CAN USB interfaces")
Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>
---
 drivers/net/can/usb/etas_es58x/es58x_core.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/can/usb/etas_es58x/es58x_core.c b/drivers/net/can/usb/etas_es58x/es58x_core.c
index 0c7f7505632c..d694cb22d9f4 100644
--- a/drivers/net/can/usb/etas_es58x/es58x_core.c
+++ b/drivers/net/can/usb/etas_es58x/es58x_core.c
@@ -680,6 +680,8 @@ int es58x_rx_err_msg(struct net_device *netdev, enum es58x_err error,
 	}
 
 	skb = alloc_can_err_skb(netdev, &cf);
+	if (!skb)
+		return -ENOMEM;
 
 	switch (error) {
 	case ES58X_ERR_OK:	/* 0: No error */
-- 
2.25.1