[PATCH ath-current] wifi: ath12k: fix memory leak in ath12k_wifi7_dp_rx_h_verify_tkip_mic()

[Miaoqing Pan]

In ath12k_wifi7_dp_rx_h_verify_tkip_mic(), the call to
ath12k_dp_rx_check_nwifi_hdr_len_valid() may return false when the
NWIFI header length is invalid, causing the function to abort early with
-EINVAL.

When this happens, the error propagates to
ath12k_wifi7_dp_rx_h_defrag(), which clears first_frag by setting it
to NULL. As a result, the corresponding MSDU is no longer referenced
by the defragmentation path and is never freed.

This leads to a memory leak for the affected MSDU on this error path.
Proper cleanup is required to ensure the MSDU is released when header
validation fails during TKIP MIC verification.

Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.1.c5-00302-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.115823.3

Fixes: 9a0dddfb30f1 ("wifi: ath12k: Fix invalid data access in ath12k_dp_rx_h_undecap_nwifi")
Signed-off-by: Miaoqing Pan <miaoqing.pan at oss.qualcomm.com>
---
 drivers/net/wireless/ath/ath12k/wifi7/dp_rx.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/ath12k/wifi7/dp_rx.c b/drivers/net/wireless/ath/ath12k/wifi7/dp_rx.c
index 945680b3ebdf..a5e290edaa89 100644
--- a/drivers/net/wireless/ath/ath12k/wifi7/dp_rx.c
+++ b/drivers/net/wireless/ath/ath12k/wifi7/dp_rx.c
@@ -1028,8 +1028,10 @@ static int ath12k_wifi7_dp_rx_h_verify_tkip_mic(struct ath12k_pdev_dp *dp_pdev,
 	skb_pull(msdu, hal_rx_desc_sz);
 
 	if (unlikely(!ath12k_dp_rx_check_nwifi_hdr_len_valid(dp, msdu,
-							     rx_info)))
+							     rx_info))) {
+		dev_kfree_skb_any(msdu);
 		return -EINVAL;
+	}
 
 	ath12k_dp_rx_h_ppdu(dp_pdev, rx_info);
 	ath12k_dp_rx_h_undecap(dp_pdev, msdu, HAL_ENCRYPT_TYPE_TKIP_MIC, true,
-- 
2.34.1