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+From: Nagarajan Maran <quic_nmaran@quicinc.com>
+To: <ath11k@lists.infradead.org>
+CC: <linux-wireless@vger.kernel.org>,
+ Bhagavathi Perumal S <quic_bperumal@quicinc.com>,
+ Nagarajan Maran <quic_nmaran@quicinc.com>
+Subject: [PATCH] wifi: ath11k: Fix invalid management rx frame length issue
+Date: Mon, 20 Mar 2023 19:08:40 +0530
+Message-ID: <20230320133840.30162-1-quic_nmaran@quicinc.com>
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+
+From: Bhagavathi Perumal S <quic_bperumal@quicinc.com>
+
+The WMI management rx event has multiple arrays of TLVs, however the common
+WMI TLV parser won't handle multiple TLV tags of same type.
+So the multiple array tags of WMI management rx TLV is parsed incorrectly
+and the length calculated becomes wrong when the target sends multiple
+array tags.
+
+Add separate TLV parser to handle multiple arrays for WMI management rx
+TLV. This fixes invalid length issue when the target sends multiple array
+tags.
+
+Tested-on: QCN9074 hw1.0 PCI WLAN.HK.2.7.0.1-01744-QCAHKSWPL_SILICONZ-1
+
+Signed-off-by: Bhagavathi Perumal S <quic_bperumal@quicinc.com>
+Co-developed-by: Nagarajan Maran <quic_nmaran@quicinc.com>
+Signed-off-by: Nagarajan Maran <quic_nmaran@quicinc.com>
+---
+ drivers/net/wireless/ath/ath11k/wmi.c | 45 +++++++++++++++++++++------
+ 1 file changed, 35 insertions(+), 10 deletions(-)
+
+
+base-commit: 3df3715e556027e94246b2cb30986563362a65f4
+
+--- a/drivers/net/wireless/ath/ath11k/wmi.c
++++ b/drivers/net/wireless/ath/ath11k/wmi.c
+@@ -82,6 +82,12 @@ struct wmi_tlv_fw_stats_parse {
+ bool chain_rssi_done;
+ };
+
++struct wmi_tlv_mgmt_rx_parse {
++ const struct wmi_mgmt_rx_hdr *fixed;
++ const u8 *frame_buf;
++ bool frame_buf_done;
++};
++
+ static const struct wmi_tlv_policy wmi_tlv_policies[] = {
+ [WMI_TAG_ARRAY_BYTE]
+ = { .min_len = 0 },
+@@ -5633,28 +5639,49 @@ static int ath11k_pull_vdev_stopped_para
+ return 0;
+ }
+
++static int ath11k_wmi_tlv_mgmt_rx_parse(struct ath11k_base *ab,
++ u16 tag, u16 len,
++ const void *ptr, void *data)
++{
++ struct wmi_tlv_mgmt_rx_parse *parse = data;
++
++ switch (tag) {
++ case WMI_TAG_MGMT_RX_HDR:
++ parse->fixed = ptr;
++ break;
++ case WMI_TAG_ARRAY_BYTE:
++ if (!parse->frame_buf_done) {
++ parse->frame_buf = ptr;
++ parse->frame_buf_done = true;
++ }
++ break;
++ }
++ return 0;
++}
++
+ static int ath11k_pull_mgmt_rx_params_tlv(struct ath11k_base *ab,
+ struct sk_buff *skb,
+ struct mgmt_rx_event_params *hdr)
+ {
+- const void **tb;
++ struct wmi_tlv_mgmt_rx_parse parse = { };
+ const struct wmi_mgmt_rx_hdr *ev;
+ const u8 *frame;
+ int ret;
+
+- tb = ath11k_wmi_tlv_parse_alloc(ab, skb->data, skb->len, GFP_ATOMIC);
+- if (IS_ERR(tb)) {
+- ret = PTR_ERR(tb);
+- ath11k_warn(ab, "failed to parse tlv: %d\n", ret);
++ ret = ath11k_wmi_tlv_iter(ab, skb->data, skb->len,
++ ath11k_wmi_tlv_mgmt_rx_parse,
++ &parse);
++ if (ret) {
++ ath11k_warn(ab, "failed to parse mgmt rx tlv %d\n",
++ ret);
+ return ret;
+ }
+
+- ev = tb[WMI_TAG_MGMT_RX_HDR];
+- frame = tb[WMI_TAG_ARRAY_BYTE];
++ ev = parse.fixed;
++ frame = parse.frame_buf;
+
+ if (!ev || !frame) {
+ ath11k_warn(ab, "failed to fetch mgmt rx hdr");
+- kfree(tb);
+ return -EPROTO;
+ }
+
+@@ -5673,7 +5700,6 @@ static int ath11k_pull_mgmt_rx_params_tl
+
+ if (skb->len < (frame - skb->data) + hdr->buf_len) {
+ ath11k_warn(ab, "invalid length in mgmt rx hdr ev");
+- kfree(tb);
+ return -EPROTO;
+ }
+
+@@ -5685,7 +5711,6 @@ static int ath11k_pull_mgmt_rx_params_tl
+
+ ath11k_ce_byte_swap(skb->data, hdr->buf_len);
+
+- kfree(tb);
+ return 0;
+ }
+
projects / openwrt / staging / hauke.git / commitdiff