wifi: ath10k: fix NULL pointer dereference in ath10k_wmi_tlv_op_pull_mgmt_tx_compl_ev()

jira LE-1907
cve CVE-2023-52651
Rebuild_History Non-Buildable kernel-5.14.0-427.31.1.el9_4
commit-author Xingyuan Mo <hdthky0@gmail.com>
commit ad25ee3

We should check whether the WMI_TLV_TAG_STRUCT_MGMT_TX_COMPL_EVENT tlv is
present before accessing it, otherwise a null pointer deference error will
occur.

Fixes: dc40515 ("ath10k: handle mgmt tx completion event")
	Signed-off-by: Xingyuan Mo <hdthky0@gmail.com>
	Acked-by: Jeff Johnson <quic_jjohnson@quicinc.com>
	Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://msgid.link/20231208043433.271449-1-hdthky0@gmail.com
(cherry picked from commit ad25ee3)
	Signed-off-by: Jonathan Maple <jmaple@ciq.com>

Author: PlaidCat

drivers/net/wireless/ath/ath10k/wmi-tlv.c

@@ -851,6 +851,10 @@ ath10k_wmi_tlv_op_pull_mgmt_tx_compl_ev(struct ath10k *ar, struct sk_buff *skb,
 	}
 
 	ev = tb[WMI_TLV_TAG_STRUCT_MGMT_TX_COMPL_EVENT];
+	if (!ev) {
+		kfree(tb);
+		return -EPROTO;
+	}
 
 	arg->desc_id = ev->desc_id;
 	arg->status = ev->status;