[ Upstream commit 862e4644fd2d7df8998edc65e0963ea2f567bde9 ]
If probe errors out after request_irq(), its error path does not explicitly cancel the delayed work, which may have been scheduled by the interrupt handler.
This means the delayed work may still be running when the core frees the private structure (struct xadc). This is a potential use-after-free.
Fix by inserting cancel_delayed_work_sync() in the probe error path.
Signed-off-by: Sven Van Asbroeck TheSven73@gmail.com Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/iio/adc/xilinx-xadc-core.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/iio/adc/xilinx-xadc-core.c b/drivers/iio/adc/xilinx-xadc-core.c index 1960694e80076..15e1a103f37da 100644 --- a/drivers/iio/adc/xilinx-xadc-core.c +++ b/drivers/iio/adc/xilinx-xadc-core.c @@ -1290,6 +1290,7 @@ static int xadc_probe(struct platform_device *pdev)
err_free_irq: free_irq(xadc->irq, indio_dev); + cancel_delayed_work_sync(&xadc->zynq_unmask_work); err_clk_disable_unprepare: clk_disable_unprepare(xadc->clk); err_free_samplerate_trigger: