From: Sven Van Asbroeck Date: Sun, 10 Mar 2019 18:58:25 +0000 (-0400) Subject: iio: adc: xilinx: fix potential use-after-free on probe X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=862e4644fd2d7df8998edc65e0963ea2f567bde9;p=linux.git iio: adc: xilinx: fix potential use-after-free on probe 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 Signed-off-by: Jonathan Cameron --- diff --git a/drivers/iio/adc/xilinx-xadc-core.c b/drivers/iio/adc/xilinx-xadc-core.c index ef3afaeed1948..5a1b63f9d0412 100644 --- a/drivers/iio/adc/xilinx-xadc-core.c +++ b/drivers/iio/adc/xilinx-xadc-core.c @@ -1292,6 +1292,7 @@ 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: