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Thu, 08 Oct 2026 08:46:14 -0700 (PDT) X-Received: by 2002:a05:6830:2b28:b0:7f6:ec23:7956 with SMTP id 46e09a7af769-82acd86affamr8593949a34.2.1791474374041; Thu, 08 Oct 2026 08:46:14 -0700 (PDT) Received: from [192.168.11.104] ([124.123.80.135]) by smtp.gmail.com with ESMTPSA id 46e09a7af769-82adc3eb1d0sm5702069a34.10.2026.10.08.08.46.10 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 08 Oct 2026 08:46:13 -0700 (PDT) Message-ID: <6de89bd9-ca0c-439b-9879-00d0cd5cc706@oss.qualcomm.com> Date: Thu, 8 Oct 2026 21:16:07 +0530 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2] wifi: ath12k: validate MAC/PHY capability count before saving To: Jiale Yao , Jeff Johnson , Vasanthakumar Thiagarajan , Baochen Qiang , linux-wireless@vger.kernel.org, ath12k@lists.infradead.org, linux-kernel@vger.kernel.org Cc: stable@vger.kernel.org References: <20261003101944.596546-1-yaojiale02@163.com> From: Rameshkumar Sundaram Content-Language: en-US In-Reply-To: <20261003101944.596546-1-yaojiale02@163.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Authority-Analysis: v=2.4 cv=AbMkjHXG c=1 sm=1 tr=0 ts=6ac7bac7 cx=c_pps a=z9lCQkyTxNhZyzAvolXo/A==:117 a=kllYWVK2JqQtNyhMtAlpJw==:17 a=IkcTkHD0fZMA:10 a=660iZSQnnn4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=gowsoOTTUOVcmtlkKump:22 a=VwQbUJbxAAAA:8 a=Byx-y9mGAAAA:8 a=EUspDBNiAAAA:8 a=CgAF95LDYrE-zO_MwBMA:9 a=QEXdDO2ut3YA:10 a=EyFUmsFV_t8cxB2kMr4A:22 X-Proofpoint-GUID: KwbxV-1L2_BBKUiXx4zU72WI1HwOEqAV X-Proofpoint-ORIG-GUID: KwbxV-1L2_BBKUiXx4zU72WI1HwOEqAV X-Proofpoint-Spam-Info: AW1haW4tMjYxMDA4MDA2MiBTYWx0ZWRfX9IshMqY+dfAj aeEk0NyQmZeRwgU9FevssLiMZXXZFVQOYevPzxJJNEan/FyOAWEMMqWwXmEFprxqTzfD62zjkZE KaX7MhnvfkJjjI0WUJq1shiws2mmAZs= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDA4MDA2MiBTYWx0ZWRfX6pXgTtIYtGi0 TdLTwR1IVLadgBJV68u4rQn0FgW5B6o+tgMEdQM9BCgCvwszeiFY5QWt7ntp/v4PUfBpf0BNm4T 3u5saAPHiLxrI+cj1BH0g0cdcstiVr5JytgEHo1vlnqdYwdxmcJ3BPemLFV9DR8l9zWxAHXUOvY 4RELHfl5lDs/JnrOgrvgQgcn1XYz30inW2xuWGrJq3giUPGvr6De32Qqp1gHJV0jgNkAZwJq2zu TDhYtr0629441m6vECssrlcqfr+cqCli+Yt4YQFm4vrIRCT4znbGY4amFURIGbiev5m2TtvijLE VDDANdEPLE0b/q+eA2G/O0M8al1zzl1xeCIgRe9oFshwwW6aHYe4yB2HgI06OT/fAsK62ITG/oH qDsIOFgsO7REzgpmf6fO289yD8TNYN3ubS8yelGccjnOoys1LwBZXBmE14lXV++jJjyWE3yL+yT brUQ7q4iJWixjx5ZOzQ== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-10-08_05,2026-10-08_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 clxscore=1015 suspectscore=0 lowpriorityscore=0 spamscore=0 impostorscore=0 malwarescore=0 adultscore=0 phishscore=0 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610020000 definitions=main-2610080062 On 10/3/2026 3:49 PM, Jiale Yao wrote: > 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