From d70d70aec9632679dd00dcc1b1e8b2517e2c7da0 Mon Sep 17 00:00:00 2001
From: Aditya Pakki <pakki001@umn.edu>
Date: Wed, 20 Mar 2019 12:02:49 -0500
Subject: [PATCH] staging: rtlwifi: rtl8822b: fix to avoid potential NULL pointer dereference
Git-commit: d70d70aec9632679dd00dcc1b1e8b2517e2c7da0
Patch-mainline: v5.1-rc3
References: bsc#1111666
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>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/staging/rtlwifi/rtl8822be/fw.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/staging/rtlwifi/rtl8822be/fw.c b/drivers/staging/rtlwifi/rtl8822be/fw.c
index f061dd1382aa..cf6b7a80b753 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);
--
2.16.4