From: Xingyuan Mo Date: Sun, 17 Dec 2023 13:29:01 +0200 Subject: wifi: ath10k: fix NULL pointer dereference in ath10k_wmi_tlv_op_pull_mgmt_tx_compl_ev() Origin: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit?id=90f089d77e38db1c48629f111f3c8c336be1bc38 Bug-Debian-Security: https://security-tracker.debian.org/tracker/CVE-2023-7042 [ Upstream commit ad25ee36f00172f7d53242dc77c69fff7ced0755 ] 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: dc405152bb64 ("ath10k: handle mgmt tx completion event") Signed-off-by: Xingyuan Mo Acked-by: Jeff Johnson Signed-off-by: Kalle Valo Link: https://msgid.link/20231208043433.271449-1-hdthky0@gmail.com Signed-off-by: Sasha Levin --- drivers/net/wireless/ath/ath10k/wmi-tlv.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/wireless/ath/ath10k/wmi-tlv.c b/drivers/net/wireless/ath/ath10k/wmi-tlv.c index 876410a47d1d..4d5009604eee 100644 --- a/drivers/net/wireless/ath/ath10k/wmi-tlv.c +++ b/drivers/net/wireless/ath/ath10k/wmi-tlv.c @@ -844,6 +844,10 @@ 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; -- 2.43.0