From: Colin Ian King <colin.king@canonical.com>
Date: Fri, 17 Nov 2017 14:50:55 +0000 (+0000)
Subject: staging: rtl8822be: fix missing null check on dev_alloc_skb return
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=dc3173bf6ccbfb0965c12bf4c412699eab549d55;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

staging: rtl8822be: fix missing null check on dev_alloc_skb return


[ Upstream commit 3eb23426e1749a0483bc4c9b18e51f657569e3ed ]

dev_alloc_skb can potentially return NULL, so add a null check to
avoid a null pointer dereference on skb

Detected by CoverityScan, CID#1454558 ("Dereference on null return")

Fixes: 7e5b796cde7e ("staging: r8822be: Add the driver code")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/staging/rtlwifi/rtl8822be/fw.c b/drivers/staging/rtlwifi/rtl8822be/fw.c
index a2cc54866e79..acabb2470d55 100644
--- a/drivers/staging/rtlwifi/rtl8822be/fw.c
+++ b/drivers/staging/rtlwifi/rtl8822be/fw.c
@@ -464,6 +464,8 @@ bool rtl8822b_halmac_cb_write_data_rsvd_page(struct rtl_priv *rtlpriv, u8 *buf,
 	int count;
 
 	skb = dev_alloc_skb(size);
+	if (!skb)
+		return false;
 	memcpy((u8 *)skb_put(skb, size), buf, size);
 
 	if (!_rtl8822be_send_bcn_or_cmd_packet(rtlpriv->hw, skb, BEACON_QUEUE))