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[103.229.18.19]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-742a986d8d7sm1247585b3a.130.2025.05.16.03.32.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 16 May 2025 03:32:21 -0700 (PDT) From: Aditya Kumar Singh Date: Fri, 16 May 2025 16:02:07 +0530 Subject: [PATCH wireless-next v2 1/2] wifi: mac80211: validate SCAN_FLAG_AP in scan request during MLO Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250516-bug_fix_mlo_scan-v2-1-12e59d9110ac@oss.qualcomm.com> References: <20250516-bug_fix_mlo_scan-v2-0-12e59d9110ac@oss.qualcomm.com> In-Reply-To: <20250516-bug_fix_mlo_scan-v2-0-12e59d9110ac@oss.qualcomm.com> To: Johannes Berg Cc: linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, Aditya Kumar Singh X-Mailer: b4 0.14.2 X-Proofpoint-GUID: x1AbuvAfDbnCEdVBubdxunuQgOAVar_c X-Proofpoint-ORIG-GUID: x1AbuvAfDbnCEdVBubdxunuQgOAVar_c X-Authority-Analysis: v=2.4 cv=JszxrN4C c=1 sm=1 tr=0 ts=68271437 cx=c_pps a=WW5sKcV1LcKqjgzy2JUPuA==:117 a=Ou0eQOY4+eZoSc0qltEV5Q==:17 a=IkcTkHD0fZMA:10 a=dt9VzEwgFbYA:10 a=EUspDBNiAAAA:8 a=DDi9Blm5zKVmG00JEVUA:9 a=QEXdDO2ut3YA:10 a=OpyuDcXvxspvyRM73sMx:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNTE2MDEwMCBTYWx0ZWRfXyiPhKstpQkIX mraye4n0pDShMTKGBS0zyzqpOx16MnwLPb7FV+EHyxD82ss6vAAFyAfZP/zNCbLQTMfv1/BKiON 6mwz2O0xOW3Cq0EMOSQdf5Mf8u7CycAr38wgQK7YYcYDePpQXYRpRKBSkejeyR6QV/UTRULvqcj c+8VHAkFOTMmAeDtFehKjzqYga6iuHcChrTNqTwc5l7+tMegKQ6OzeaAOQLCJ2O305IwJZu1Ttv G/3zQbSJeBQ5XbseunnjT4DxG6nBqhjLuGcKmwEUyNWJPq/Sb3pVQPvjliGDdSL4NSIlcToFzVi Y5fMkQpAAUPiVVmBwKZ4DXU5hMDvwHz83a118pLez+5YRHwQh0mhGskvjmBeqWRMVrSzHqOVTeP ZcJz2lusy1DVtSVo+HlLMGemXSLSiKcV96m1PJ4GZ62k1gDG1WMg/1beLIAN6LFCpY1zJ0pK X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.0.736,FMLib:17.12.80.40 definitions=2025-05-16_04,2025-05-16_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 priorityscore=1501 suspectscore=0 mlxlogscore=999 bulkscore=0 malwarescore=0 mlxscore=0 adultscore=0 phishscore=0 spamscore=0 lowpriorityscore=0 clxscore=1015 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2505070000 definitions=main-2505160100 When an AP interface is already beaconing, a subsequent scan is not allowed unless the user space explicitly sets the flag NL80211_SCAN_FLAG_AP in the scan request. If this flag is not set, the scan request will be returned with the error code -EOPNOTSUPP. However, this restriction currently applies only to non-ML interfaces. For ML interfaces, scans are allowed without this flag being explicitly set by the user space which is wrong. This is because the beaconing check currently uses only the deflink, which does not get set during MLO. Hence to fix this, during MLO, use the existing helper ieee80211_num_beaconing_links() to know if any of the link is beaconing. Signed-off-by: Aditya Kumar Singh --- net/mac80211/cfg.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index 05b7296b152cfbe1e81f8981eee52d72f711706c..d9d88f2f283120ba366401d3ac546e59d8c61c21 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -2924,7 +2924,7 @@ static int ieee80211_scan(struct wiphy *wiphy, * the frames sent while scanning on other channel will be * lost) */ - if (sdata->deflink.u.ap.beacon && + if (ieee80211_num_beaconing_links(sdata) && (!(wiphy->features & NL80211_FEATURE_AP_SCAN) || !(req->flags & NL80211_SCAN_FLAG_AP))) return -EOPNOTSUPP; From patchwork Fri May 16 10:32:08 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aditya Kumar Singh X-Patchwork-Id: 890904 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (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 EE8DE233159 for ; 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[103.229.18.19]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-742a986d8d7sm1247585b3a.130.2025.05.16.03.32.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 16 May 2025 03:32:23 -0700 (PDT) From: Aditya Kumar Singh Date: Fri, 16 May 2025 16:02:08 +0530 Subject: [PATCH wireless-next v2 2/2] wifi: mac80211: accept probe response on link address as well Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250516-bug_fix_mlo_scan-v2-2-12e59d9110ac@oss.qualcomm.com> References: <20250516-bug_fix_mlo_scan-v2-0-12e59d9110ac@oss.qualcomm.com> In-Reply-To: <20250516-bug_fix_mlo_scan-v2-0-12e59d9110ac@oss.qualcomm.com> To: Johannes Berg Cc: linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, Aditya Kumar Singh X-Mailer: b4 0.14.2 X-Proofpoint-GUID: FmymP377KZxb7XqXeaEbB4WNnRi_HI_h X-Proofpoint-ORIG-GUID: FmymP377KZxb7XqXeaEbB4WNnRi_HI_h X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNTE2MDEwMCBTYWx0ZWRfX+DW5Gjr6LIfU GoXadGgYCxx4ercTIybvpXfc5Dt4ivMFqTFYrABAE41PieZqA8F2m36AJEnr1/AdBR6RpQzA+qc IUSekIwcdn1UTWenxQ86JvYpDmtyRqUo90jsa2kEiQOuDb+zExFW6tQtgoRntnFhEGHRMUnivsn PqkluluTwds9wiuyqpevxm7UKyOPTuIjSTjUqHvhuK1mZS7GmkbnBfRBzjGEMgXKnkj+lGagoht 2pVEoyZ4oUfkxUFBpxnE6aiOXhNB5Yw8cfDLtGXLUIE/JS6Z+0A5ry9GEvKMjUw7T9jmgPPB/EB 1oN5tqDAP6O/E3xSqFJOtRds7ujCevsF+cQY9l4fYZtMaEIngqwXlNSw8wjdqLoPK0Oqa/IMIbW 63sr8/WcZNtt21pHc7YvXPuflO6HWNYk9CoX0CEhbBSACeomZKyry7dx8AHKQFQ0uoV2t2iI X-Authority-Analysis: v=2.4 cv=Gp9C+l1C c=1 sm=1 tr=0 ts=68271439 cx=c_pps a=m5Vt/hrsBiPMCU0y4gIsQw==:117 a=Ou0eQOY4+eZoSc0qltEV5Q==:17 a=IkcTkHD0fZMA:10 a=dt9VzEwgFbYA:10 a=EUspDBNiAAAA:8 a=kffUEhMhicqf5g7Do04A:9 a=QEXdDO2ut3YA:10 a=IoOABgeZipijB_acs4fv:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.0.736,FMLib:17.12.80.40 definitions=2025-05-16_04,2025-05-16_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 clxscore=1015 spamscore=0 lowpriorityscore=0 impostorscore=0 bulkscore=0 adultscore=0 suspectscore=0 priorityscore=1501 mlxscore=0 malwarescore=0 mlxlogscore=999 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2505070000 definitions=main-2505160100 If a random MAC address is not requested during scan request, unicast probe response frames are only accepted if the destination address matches the interface address. This works fine for non-ML interfaces. However, with MLO, the same interface can have multiple links, and a scan on a link would be requested with the link address. In such cases, the probe response frame gets dropped which is incorrect. Therefore, add logic to check if any of the link addresses match the destination address if the interface address does not match. Signed-off-by: Aditya Kumar Singh --- net/mac80211/scan.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c index cb707907188585d6874bf290874bdb0ca33bb399..7b8da40a912d020f229a74c67bd5a57fb513a72d 100644 --- a/net/mac80211/scan.c +++ b/net/mac80211/scan.c @@ -240,6 +240,9 @@ static bool ieee80211_scan_accept_presp(struct ieee80211_sub_if_data *sdata, struct ieee80211_channel *channel, u32 scan_flags, const u8 *da) { + struct ieee80211_link_data *link_sdata; + u8 link_id; + if (!sdata) return false; @@ -251,7 +254,20 @@ static bool ieee80211_scan_accept_presp(struct ieee80211_sub_if_data *sdata, if (scan_flags & NL80211_SCAN_FLAG_RANDOM_ADDR) return true; - return ether_addr_equal(da, sdata->vif.addr); + + if (ether_addr_equal(da, sdata->vif.addr)) + return true; + + for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { + link_sdata = rcu_dereference(sdata->link[link_id]); + if (!link_sdata) + continue; + + if (ether_addr_equal(da, link_sdata->conf->addr)) + return true; + } + + return false; } void ieee80211_scan_rx(struct ieee80211_local *local, struct sk_buff *skb)