From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7F5BB26FA7A; Thu, 3 Apr 2025 19:06:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743707218; cv=none; b=MP1BgQ23Xm+sODhKnc9frHbieA1bheR1phEecknS4FXyxvMvgVJDrRiruTT3WhHTSm3POgyes7OHiKInfcBqGaklPN/5ApxsTRgphKsGU1MavYU9cC8ssGHpEC4tvG+ZdZonR6A9tpcBWRUim1rym69CuaM6WHtkAcAq/ykyGb8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743707218; c=relaxed/simple; bh=GykWMv9yUeQ2ORZ2k4NJ2CoDTsehWfoqApw1vybybwU=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=Y7XpUsFb+u6Rp6mO/KBt0zokZYAVm+Vkor77MvQQ1PxBQbTIQD5R6QjEsqbbaD8BUE9F1heHC/oXg6tXtNGuNPXTzMtlVerb3gdW1S/XgoWrVh7Bhc/Ziwvdf0LhcfOHLgPwvbmBXb4kGQSIHDAFRMNdtGHjL9xgyI98yFM/8/Y= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=S7V5Ouiq; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="S7V5Ouiq" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1CC54C4CEE3; Thu, 3 Apr 2025 19:06:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1743707218; bh=GykWMv9yUeQ2ORZ2k4NJ2CoDTsehWfoqApw1vybybwU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=S7V5OuiqQQfNKCGx2vs+jVB2yEDU30ddQPgJNMp8vKvtBWieJ9Ihtll28OR0L8gmF 1FwRXJitb3Ufb/hHxyBga4I15m1hIAgAtHQa0ikmvb+wqjrk0F5IiynTjsUVTm6iWM qQSFzeiEquem+DCq9KrUKQ2M7BnTTeQoR1i2zpM18r553aG0Et3B9dtod2y2VVdUCm FoTFYGFYUgymWDSP5CbSV+MBHCKPJsYPvXfA7MSMOy7Oag+fEMCRwSwNeYyi2Z5pGj tC7i3lRULRYOKG2nMGXUJzgIQ/C3UChT2z1WOTIMiz74USomAwF/u+sSZzC+d/2l9u iFGkheANcJ/0g== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Manish Dharanenthiran , Tamizh Chelvam Raja , Jeff Johnson , Sasha Levin , jjohnson@kernel.org, ath12k@lists.infradead.org Subject: [PATCH AUTOSEL 6.12 25/47] wifi: ath12k: Fix invalid data access in ath12k_dp_rx_h_undecap_nwifi Date: Thu, 3 Apr 2025 15:05:33 -0400 Message-Id: <20250403190555.2677001-25-sashal@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250403190555.2677001-1-sashal@kernel.org> References: <20250403190555.2677001-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.12.21 Content-Transfer-Encoding: 8bit From: Manish Dharanenthiran [ Upstream commit 9a0dddfb30f120db3851627935851d262e4e7acb ] In certain cases, hardware might provide packets with a length greater than the maximum native Wi-Fi header length. This can lead to accessing and modifying fields in the header within the ath12k_dp_rx_h_undecap_nwifi function for DP_RX_DECAP_TYPE_NATIVE_WIFI decap type and potentially resulting in invalid data access and memory corruption. Add a sanity check before processing the SKB to prevent invalid data access in the undecap native Wi-Fi function for the DP_RX_DECAP_TYPE_NATIVE_WIFI decap type. Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.3.1-00173-QCAHKSWPL_SILICONZ-1 Signed-off-by: Manish Dharanenthiran Signed-off-by: Tamizh Chelvam Raja Link: https://patch.msgid.link/20250211090302.4105141-1-tamizh.raja@oss.qualcomm.com Signed-off-by: Jeff Johnson Signed-off-by: Sasha Levin --- drivers/net/wireless/ath/ath12k/dp_rx.c | 42 +++++++++++++++++++++++-- 1 file changed, 40 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/ath/ath12k/dp_rx.c b/drivers/net/wireless/ath/ath12k/dp_rx.c index 91e3393f7b5f4..4cbba96121a11 100644 --- a/drivers/net/wireless/ath/ath12k/dp_rx.c +++ b/drivers/net/wireless/ath/ath12k/dp_rx.c @@ -2470,6 +2470,29 @@ static void ath12k_dp_rx_deliver_msdu(struct ath12k *ar, struct napi_struct *nap ieee80211_rx_napi(ath12k_ar_to_hw(ar), pubsta, msdu, napi); } +static bool ath12k_dp_rx_check_nwifi_hdr_len_valid(struct ath12k_base *ab, + struct hal_rx_desc *rx_desc, + struct sk_buff *msdu) +{ + struct ieee80211_hdr *hdr; + u8 decap_type; + u32 hdr_len; + + decap_type = ath12k_dp_rx_h_decap_type(ab, rx_desc); + if (decap_type != DP_RX_DECAP_TYPE_NATIVE_WIFI) + return true; + + hdr = (struct ieee80211_hdr *)msdu->data; + hdr_len = ieee80211_hdrlen(hdr->frame_control); + + if ((likely(hdr_len <= DP_MAX_NWIFI_HDR_LEN))) + return true; + + ab->soc_stats.invalid_rbm++; + WARN_ON_ONCE(1); + return false; +} + static int ath12k_dp_rx_process_msdu(struct ath12k *ar, struct sk_buff *msdu, struct sk_buff_head *msdu_list, @@ -2528,6 +2551,11 @@ static int ath12k_dp_rx_process_msdu(struct ath12k *ar, } } + if (unlikely(!ath12k_dp_rx_check_nwifi_hdr_len_valid(ab, rx_desc, msdu))) { + ret = -EINVAL; + goto free_out; + } + ath12k_dp_rx_h_ppdu(ar, rx_desc, rx_status); ath12k_dp_rx_h_mpdu(ar, msdu, rx_desc, rx_status); @@ -2880,6 +2908,9 @@ static int ath12k_dp_rx_h_verify_tkip_mic(struct ath12k *ar, struct ath12k_peer RX_FLAG_IV_STRIPPED | RX_FLAG_DECRYPTED; skb_pull(msdu, hal_rx_desc_sz); + if (unlikely(!ath12k_dp_rx_check_nwifi_hdr_len_valid(ab, rx_desc, msdu))) + return -EINVAL; + ath12k_dp_rx_h_ppdu(ar, rx_desc, rxs); ath12k_dp_rx_h_undecap(ar, msdu, rx_desc, HAL_ENCRYPT_TYPE_TKIP_MIC, rxs, true); @@ -3600,6 +3631,9 @@ static int ath12k_dp_rx_h_null_q_desc(struct ath12k *ar, struct sk_buff *msdu, skb_put(msdu, hal_rx_desc_sz + l3pad_bytes + msdu_len); skb_pull(msdu, hal_rx_desc_sz + l3pad_bytes); } + if (unlikely(!ath12k_dp_rx_check_nwifi_hdr_len_valid(ab, desc, msdu))) + return -EINVAL; + ath12k_dp_rx_h_ppdu(ar, desc, status); ath12k_dp_rx_h_mpdu(ar, msdu, desc, status); @@ -3644,7 +3678,7 @@ static bool ath12k_dp_rx_h_reo_err(struct ath12k *ar, struct sk_buff *msdu, return drop; } -static void ath12k_dp_rx_h_tkip_mic_err(struct ath12k *ar, struct sk_buff *msdu, +static bool ath12k_dp_rx_h_tkip_mic_err(struct ath12k *ar, struct sk_buff *msdu, struct ieee80211_rx_status *status) { struct ath12k_base *ab = ar->ab; @@ -3662,6 +3696,9 @@ static void ath12k_dp_rx_h_tkip_mic_err(struct ath12k *ar, struct sk_buff *msdu, skb_put(msdu, hal_rx_desc_sz + l3pad_bytes + msdu_len); skb_pull(msdu, hal_rx_desc_sz + l3pad_bytes); + if (unlikely(!ath12k_dp_rx_check_nwifi_hdr_len_valid(ab, desc, msdu))) + return true; + ath12k_dp_rx_h_ppdu(ar, desc, status); status->flag |= (RX_FLAG_MMIC_STRIPPED | RX_FLAG_MMIC_ERROR | @@ -3669,6 +3706,7 @@ static void ath12k_dp_rx_h_tkip_mic_err(struct ath12k *ar, struct sk_buff *msdu, ath12k_dp_rx_h_undecap(ar, msdu, desc, HAL_ENCRYPT_TYPE_TKIP_MIC, status, false); + return false; } static bool ath12k_dp_rx_h_rxdma_err(struct ath12k *ar, struct sk_buff *msdu, @@ -3687,7 +3725,7 @@ static bool ath12k_dp_rx_h_rxdma_err(struct ath12k *ar, struct sk_buff *msdu, case HAL_REO_ENTR_RING_RXDMA_ECODE_TKIP_MIC_ERR: err_bitmap = ath12k_dp_rx_h_mpdu_err(ab, rx_desc); if (err_bitmap & HAL_RX_MPDU_ERR_TKIP_MIC) { - ath12k_dp_rx_h_tkip_mic_err(ar, msdu, status); + drop = ath12k_dp_rx_h_tkip_mic_err(ar, msdu, status); break; } fallthrough; -- 2.39.5