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([152.58.129.17]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2b083655474sm99107885ad.48.2026.03.22.05.46.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 22 Mar 2026 05:47:01 -0700 (PDT) From: Anas Iqbal To: srini@kernel.org Cc: gregkh@linuxfoundation.org, vkoul@kernel.org, linux-arm-msm@vger.kernel.org, linux-sound@vger.kernel.org, linux-kernel@vger.kernel.org, Anas Iqbal Subject: [PATCH] slimbus: qcom-ngd: fix NULL pointer dereference in qcom_slim_ngd_xfer_msg() Date: Sun, 22 Mar 2026 12:46:47 +0000 Message-ID: <20260322124647.4246-1-mohd.abd.6602@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" txn->msg is dereferenced without a prior NULL check in qcom_slim_ngd_xfer_msg(), which may lead to a NULL pointer dereference. Although current callers initialize txn->msg, add a defensive check to prevent potential crashes if a NULL pointer is passed. Fixes: 917809e2280bb ("slimbus: ngd: Add qcom SLIMBus NGD driver") Signed-off-by: Anas Iqbal --- drivers/slimbus/qcom-ngd-ctrl.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/slimbus/qcom-ngd-ctrl.c b/drivers/slimbus/qcom-ngd-ctr= l.c index 9aa7218b4e8d..241f5e08b582 100644 --- a/drivers/slimbus/qcom-ngd-ctrl.c +++ b/drivers/slimbus/qcom-ngd-ctrl.c @@ -805,6 +805,9 @@ static int qcom_slim_ngd_xfer_msg(struct slim_controlle= r *sctrl, if (txn->dt =3D=3D SLIM_MSG_DEST_ENUMADDR) return -EPROTONOSUPPORT; =20 + if (!txn->msg) + return -EINVAL; + if (txn->msg->num_bytes > SLIM_MSGQ_BUF_LEN || txn->rl > SLIM_MSGQ_BUF_LEN) { dev_err(ctrl->dev, "msg exceeds HW limit\n"); --=20 2.43.0