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wifi: ath12k: Add MSDU length validation for TKIP MIC error

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[ Upstream commit 763216fe6c5df95d122c71ef34c342427c987820 ]

In the WBM error path, while processing TKIP MIC errors, MSDU length
is fetched from the hal_rx_desc's msdu_end. This MSDU length is
directly passed to skb_put() without validation. In stress test
scenarios, the WBM error ring may receive invalid descriptors, which
could lead to an invalid MSDU length.

To fix this, add a check to drop the skb when the calculated MSDU
length is greater than the skb size.

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.3.1-00173-QCAHKSWPL_SILICONZ-1
Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3

Fixes: d889913205 ("wifi: ath12k: driver for Qualcomm Wi-Fi 7 devices")
Signed-off-by: P Praneesh <quic_ppranees@quicinc.com>
Signed-off-by: Nithyanantham Paramasivam <nithyanantham.paramasivam@oss.qualcomm.com>
Reviewed-by: Vasanthakumar Thiagarajan <vasanthakumar.thiagarajan@oss.qualcomm.com>
Link: https://patch.msgid.link/20250416021903.3178962-1-nithyanantham.paramasivam@oss.qualcomm.com
Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
P Praneesh
2025-04-16 07:49:03 +05:30
committed by Greg Kroah-Hartman
parent f76f399004
commit c9c9107ffa
1 changed files with 9 additions and 0 deletions
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9
drivers/net/wireless/ath/ath12k/dp_rx.c
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@@ -3683,6 +3683,15 @@ static bool ath12k_dp_rx_h_tkip_mic_err(struct ath12k *ar, struct sk_buff *msdu,
l3pad_bytes = ath12k_dp_rx_h_l3pad(ab, desc);
msdu_len = ath12k_dp_rx_h_msdu_len(ab, desc);
if ((hal_rx_desc_sz + l3pad_bytes + msdu_len) > DP_RX_BUFFER_SIZE) {
ath12k_dbg(ab, ATH12K_DBG_DATA,
"invalid msdu len in tkip mic err %u\n", msdu_len);
ath12k_dbg_dump(ab, ATH12K_DBG_DATA, NULL, "", desc,
sizeof(*desc));
return true;
}
skb_put(msdu, hal_rx_desc_sz + l3pad_bytes + msdu_len);
skb_pull(msdu, hal_rx_desc_sz + l3pad_bytes);