From: Aditya Pakki <pakki001@umn.edu>
Date: Wed, 20 Mar 2019 17:02:49 +0000 (-0500)
Subject: staging: rtlwifi: rtl8822b: fix to avoid potential NULL pointer dereference
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=d70d70aec9632679dd00dcc1b1e8b2517e2c7da0;p=linux.git

staging: rtlwifi: rtl8822b: fix to avoid potential NULL pointer dereference

skb allocated via dev_alloc_skb can fail and return a NULL pointer.
This patch avoids such a scenario and returns, consistent with other
invocations.

Signed-off-by: Aditya Pakki <pakki001@umn.edu>
Reviewed-by: Mukesh Ojha <mojha@codeaurora.org>
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 f061dd1382aa1..cf6b7a80b753b 100644
--- a/drivers/staging/rtlwifi/rtl8822be/fw.c
+++ b/drivers/staging/rtlwifi/rtl8822be/fw.c
@@ -743,6 +743,8 @@ void rtl8822be_set_fw_rsvdpagepkt(struct ieee80211_hw *hw, bool b_dl_finished)
 		      u1_rsvd_page_loc, 3);
 
 	skb = dev_alloc_skb(totalpacketlen);
+	if (!skb)
+		return;
 	memcpy((u8 *)skb_put(skb, totalpacketlen), &reserved_page_packet,
 	       totalpacketlen);