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Mon, 04 May 2026 22:00:04 -0700 (PDT) Received: from dtor-ws.sjc.corp.google.com ([2a00:79e0:2ebe:8:94ef:a6f3:2c96:2d58]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-12df827a73fsm16897502c88.1.2026.05.04.22.00.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 04 May 2026 22:00:03 -0700 (PDT) From: Dmitry Torokhov To: linux-input@vger.kernel.org Cc: Marge Yang , Greg Kroah-Hartman , linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH v2 05/20] Input: rmi4 - fix memory leak in rmi_set_attn_data() Date: Mon, 4 May 2026 21:59:35 -0700 Message-ID: <20260505045952.1570713-5-dmitry.torokhov@gmail.com> X-Mailer: git-send-email 2.54.0.545.g6539524ca2-goog In-Reply-To: <20260505045952.1570713-1-dmitry.torokhov@gmail.com> References: <20260505045952.1570713-1-dmitry.torokhov@gmail.com> Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit kfifo_put() returns 0 if the FIFO is full. In this case, we must free the memory allocated for the attention data to avoid a leak. Fixes: b908d3cd812a ("Input: synaptics-rmi4 - allow to add attention data") Cc: stable@vger.kernel.org Assisted-by: Gemini:gemini-3.1-pro Signed-off-by: Dmitry Torokhov --- drivers/input/rmi4/rmi_driver.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/input/rmi4/rmi_driver.c b/drivers/input/rmi4/rmi_driver.c index 75949fb1a922..d873c7f08e42 100644 --- a/drivers/input/rmi4/rmi_driver.c +++ b/drivers/input/rmi4/rmi_driver.c @@ -183,7 +183,11 @@ void rmi_set_attn_data(struct rmi_device *rmi_dev, unsigned long irq_status, attn_data.size = size; attn_data.data = fifo_data; - kfifo_put(&drvdata->attn_fifo, attn_data); + if (!kfifo_put(&drvdata->attn_fifo, attn_data)) { + dev_warn_ratelimited(&rmi_dev->dev, + "Failed to enqueue attention data, FIFO full\n"); + kfree(fifo_data); + } } EXPORT_SYMBOL_GPL(rmi_set_attn_data); -- 2.54.0.545.g6539524ca2-goog