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

[Baochen Qiang]

On 5/12/2026 10:11 AM, Miaoqing Pan wrote:
> 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>

Reviewed-by: Baochen Qiang <baochen.qiang at oss.qualcomm.com>