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

[ Upstream commit d70d70aec9632679dd00dcc1b1e8b2517e2c7da0 ]

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>
Signed-off-by: Sasha Levin (Microsoft) <sashal@kernel.org>

diff --git a/drivers/staging/rtlwifi/rtl8822be/fw.c b/drivers/staging/rtlwifi/rtl8822be/fw.c
index a403966..c1ed52d 100644 (file)
--- a/drivers/staging/rtlwifi/rtl8822be/fw.c
+++ b/drivers/staging/rtlwifi/rtl8822be/fw.c
@@ -741,6 +741,8 @@ 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);