6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jiale Yao [ Upstream commit 86f2537877d6029487811bc3e0cd9e086a196000 ] Firmware supplies the hardware mode count and the PHY bitmap for each mode in the service-ready-ext event. ath12k_wmi_save_all_mac_phy_info() uses those bitmaps to populate svc_ext_info->mac_phy_info, but the destination is a fixed array of ATH12K_MAX_MAC_PHY_CAP elements. If the total number of advertised PHY entries exceeds that limit, the loop writes beyond mac_phy_info and corrupts adjacent memory. ath12k_wmi_mac_phy_caps_parse() allocates the source array for tot_phy_id entries and rejects excess capability TLVs. However, if the event contains fewer capability TLVs than advertised, the remaining allocated entries stay zeroed and are saved as invalid PHY information. After parsing the MAC/PHY capability TLVs, validate the destination capacity and reject an incomplete capability list before saving any entries. Fixes: 062ade23991e ("wifi: ath12k: parse and save hardware mode info from WMI_SERVICE_READY_EXT_EVENTID event for later use") Cc: stable@vger.kernel.org Signed-off-by: Jiale Yao Reviewed-by: Rameshkumar Sundaram Reviewed-by: Baochen Qiang Link: https://patch.msgid.link/20261003101944.596546-1-yaojiale02@163.com Signed-off-by: Jeff Johnson Signed-off-by: Sasha Levin --- drivers/net/wireless/ath/ath12k/wmi.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/drivers/net/wireless/ath/ath12k/wmi.c b/drivers/net/wireless/ath/ath12k/wmi.c index 91f293ab70137..67c9174a30aab 100644 --- a/drivers/net/wireless/ath/ath12k/wmi.c +++ b/drivers/net/wireless/ath/ath12k/wmi.c @@ -4814,6 +4814,7 @@ static int ath12k_wmi_svc_rdy_ext_parse(struct ath12k_base *ab, u16 tag, u16 len, const void *ptr, void *data) { + struct ath12k_svc_ext_info *svc_ext_info = &ab->wmi_ab.svc_ext_info; struct ath12k_wmi_pdev *wmi_handle = &ab->wmi_ab.wmi[0]; struct ath12k_wmi_svc_rdy_ext_parse *svc_rdy_ext = data; int ret; @@ -4858,6 +4859,22 @@ static int ath12k_wmi_svc_rdy_ext_parse(struct ath12k_base *ab, return ret; } + if (svc_rdy_ext->tot_phy_id > + ARRAY_SIZE(svc_ext_info->mac_phy_info)) { + ath12k_warn(ab, "too many PHY entries %u (max %zu)\n", + svc_rdy_ext->tot_phy_id, + ARRAY_SIZE(svc_ext_info->mac_phy_info)); + return -EINVAL; + } + + if (svc_rdy_ext->n_mac_phy_caps < svc_rdy_ext->tot_phy_id) { + ath12k_warn(ab, + "not enough MAC/PHY caps %u, expected %u\n", + svc_rdy_ext->n_mac_phy_caps, + svc_rdy_ext->tot_phy_id); + return -EINVAL; + } + ath12k_wmi_save_all_mac_phy_info(ab, svc_rdy_ext); svc_rdy_ext->mac_phy_done = true; -- 2.53.0