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Mon, 27 Apr 2026 04:11:43 -0700 (PDT) Received: from junjungu-PC.localdomain ([223.167.147.125]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-36471fa688fsm1990016a91.4.2026.04.27.04.11.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 27 Apr 2026 04:11:43 -0700 (PDT) From: Felix Gu Date: Mon, 27 Apr 2026 19:11:39 +0800 Subject: [PATCH] iio: buffer: hw-consumer: free scan_mask on buffer release 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 Message-Id: <20260427-iio_buf-v1-1-2bbdac844647@gmail.com> X-B4-Tracking: v=1; b=H4sIAGpE72kC/6tWKk4tykwtVrJSqFYqSi3LLM7MzwNyDHUUlJIzE vPSU3UzU4B8JSMDIzMDEyNz3czM/Pik0jRdAxNTyyTjtETjlFQLJaDqgqLUtMwKsEnRsbW1AOk oQDlZAAAA X-Change-ID: 20260427-iio_buf-0459b3fa3de8 To: Jonathan Cameron , David Lechner , =?utf-8?q?Nuno_S=C3=A1?= , Andy Shevchenko Cc: linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, Jonathan Cameron , Felix Gu X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1777288301; l=1408; i=ustc.gu@gmail.com; h=from:subject:message-id; bh=ySxi/Mn8Fix5kKo/2W/6bJG6HK/Mzx5jqEG4YxuqbGI=; b=tUiVgbQfuDwKz55HhdbhNA6cMTkWuwxxQLOe1/osLDaVRF9pFwQCNp68uCvFNlu98deBTzrjg +wnhQTTK/7gASukY4ON3Udx8SQvg9ryaVM3YvzeoN0HrzWFPCNp3b06 X-Developer-Key: i=ustc.gu@gmail.com; a=ed25519; pk=fjUXwmjchVN7Ja6KGP55IXOzFeCl9edaHoQIEUA+/hw= The scan_mask lifetime changed in commit 9a2e1233d38c ("iio: buffer: hw-consumer: remove redundant scan_mask flexible array"). Before that change, the scan mask storage was embedded in struct hw_consumer_buffer, so iio_hw_buf_release() could free the whole allocation with a single kfree(hw_buf). That commit moved the scan mask to a separate bitmap_zalloc() allocation stored in buffer.scan_mask, but left iio_hw_buf_release() unchanged. Free the scan mask in iio_hw_buf_release() before freeing the buffer wrapper. Fixes: 9a2e1233d38c ("iio: buffer: hw-consumer: remove redundant scan_mask flexible array") Signed-off-by: Felix Gu --- drivers/iio/buffer/industrialio-hw-consumer.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/iio/buffer/industrialio-hw-consumer.c b/drivers/iio/buffer/industrialio-hw-consumer.c index 24d7df603760..d1ab2cbf8c88 100644 --- a/drivers/iio/buffer/industrialio-hw-consumer.c +++ b/drivers/iio/buffer/industrialio-hw-consumer.c @@ -40,6 +40,8 @@ static void iio_hw_buf_release(struct iio_buffer *buffer) { struct hw_consumer_buffer *hw_buf = iio_buffer_to_hw_consumer_buffer(buffer); + + bitmap_free(buffer->scan_mask); kfree(hw_buf); } --- base-commit: 7080e32d3f09d8688c4a87d81bdcc71f7f606b16 change-id: 20260427-iio_buf-0459b3fa3de8 Best regards, -- Felix Gu