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[129.46.96.20]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-304ed2f2904sm8667431eec.9.2026.06.01.04.32.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 01 Jun 2026 04:32:32 -0700 (PDT) From: Zijun Hu Subject: [PATCH 0/2] Bluetooth: hci_qca: fix NULL pointer dereferences for non-serdev devices Date: Mon, 01 Jun 2026 04:30:54 -0700 Message-Id: <20260601-fix_none_serdev-v1-0-8d0497ba83b0@oss.qualcomm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIAG5tHWoC/x2MQQqAIBAAvyJ7TlBDib4SIaFr7UVDIQLx7y0dB 2amQ8NK2GAVHSo+1KhkBj0JCNeRT5QUmcEo45RTWiZ6fS4ZPYcRH2mTcrMNRrtFA1d3RVb+47a P8QGX1bDgYQAAAA== X-Change-ID: 20260601-fix_none_serdev-5f0635c21681 To: Bartosz Golaszewski , Marcel Holtmann , Luiz Augusto von Dentz , Mengshi Wu , Dmitry Baryshkov , Sai Teja Aluvala Cc: Zijun Hu , Luiz Augusto von Dentz , Bartosz Golaszewski , linux-arm-msm@vger.kernel.org, linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org, Zijun Hu X-Mailer: b4 0.14.3 X-Proofpoint-ORIG-GUID: bPl_h6PEhBIwTsN4bGSmhQs-69QV-jOa X-Proofpoint-GUID: bPl_h6PEhBIwTsN4bGSmhQs-69QV-jOa X-Authority-Analysis: v=2.4 cv=eqnvCIpX c=1 sm=1 tr=0 ts=6a1d6dd1 cx=c_pps a=Uww141gWH0fZj/3QKPojxA==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=IkcTkHD0fZMA:10 a=FelO9ux0wxsA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yOCtJkima9RkubShWh1s:22 a=EUspDBNiAAAA:8 a=_MtBovt6BdkQ8AjZJCQA:9 a=QEXdDO2ut3YA:10 a=PxkB5W3o20Ba91AHUih5:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNjAxMDExNiBTYWx0ZWRfX1k+DYmoF2jyC aaPjWNZo/q3VRp3+YAdi20+gtYVWSoZLbjxTxyQH1deiVusFiY5uwb2BF0FICgHBGz/GE52CcPI qPJAfpG8L8nMIOAUNsFrrgEeEBCfyncjKnnobgdP4wD+PN5zeCRSSBm0HlA2z3CoDfZZjDlI8WU 8sOYeZvr1MoVlUO16NxU/x3Vd9p/5D4upoCLEHurQXH9Z4obhpgX6LnAYIeUxKZOYP6d0DfC+i6 63avCrwKxALBxYLWS9MvEqQQtTY0MWpcmId8MCICOJgFZtREYbwHcXmdl5bQxsDVXB1k0tev/AH 1H9aCq2sN3MFizDIZtzgBqp9YJ538hlE15u/JLLg6mmOwEQR8Y8VXT0rZPsvvbO03m2wP5W7v62 Yc6kYHn9Wmh5jgRxo0OGcBN41PRlbquBb67E8MkjmbWfxYJciA1VAi/M86K8GGKCgVWVb1ZZS5p 5WwptqVXkXLip1TfMUQ== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-06-01_03,2026-05-28_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 impostorscore=0 spamscore=0 malwarescore=0 priorityscore=1501 suspectscore=0 adultscore=0 lowpriorityscore=0 phishscore=0 clxscore=1015 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605210000 definitions=main-2606010116 When a QCA controller is attached via a non-serdev path (e.g. hci_uart line discipline), hu->serdev is NULL. A couple of code paths dereference it unconditionally, leading to NULL pointer dereferences. This series fixes two such cases: - qca_setup() dereferences the result of serdev_device_get_drvdata(hu->serdev). - qca_dmp_hdr() dereferences hu->serdev->dev.driver->name. Both are fixed by guarding the dereference with a NULL check. Signed-off-by: Zijun Hu --- Zijun Hu (2): Bluetooth: hci_qca: fix NULL pointer dereference in qca_setup() for non-serdev device Bluetooth: hci_qca: fix NULL pointer dereference in qca_dmp_hdr() for non-serdev device drivers/bluetooth/hci_qca.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) --- base-commit: 379b101059b44f64f6c5c022724f880a68fed15b change-id: 20260601-fix_none_serdev-5f0635c21681 Best regards, -- Zijun Hu