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usb: musb: musb_dsps: request_irq() after initializing musb
If IRQ occurs between calling dsps_setup_optional_vbus_irq() and dsps_create_musb_pdev(), then null pointer dereference occurs since glue->musb wasn't initialized yet. The patch puts initializing of neccesery data before registration of the interrupt handler. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Nadezda Lutovinova <lutovinova@ispras.ru> Link: https://lore.kernel.org/r/20210819163323.17714-1-lutovinova@ispras.ru Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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parent
1abade6456
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7c75bde329
1 changed files with 6 additions and 7 deletions
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@ -890,23 +890,22 @@ static int dsps_probe(struct platform_device *pdev)
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if (!glue->usbss_base)
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return -ENXIO;
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if (usb_get_dr_mode(&pdev->dev) == USB_DR_MODE_PERIPHERAL) {
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ret = dsps_setup_optional_vbus_irq(pdev, glue);
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if (ret)
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goto err_iounmap;
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}
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platform_set_drvdata(pdev, glue);
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pm_runtime_enable(&pdev->dev);
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ret = dsps_create_musb_pdev(glue, pdev);
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if (ret)
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goto err;
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if (usb_get_dr_mode(&pdev->dev) == USB_DR_MODE_PERIPHERAL) {
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ret = dsps_setup_optional_vbus_irq(pdev, glue);
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if (ret)
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goto err;
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}
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return 0;
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err:
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pm_runtime_disable(&pdev->dev);
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err_iounmap:
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iounmap(glue->usbss_base);
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return ret;
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}
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