.data of platform_device_info will be copied into .platform_data of struct device via platform_device_add_data. However, vhcis[i] contains a spinlock, is dynamically allocated and used by other code, so it is not meant to be copied. The workaround was to use void *vhci as an agent, but it was removed in the commit suggested below. This patch adds back the workaround and changes the way of using platform_data accordingly. Reported-by: syzbot+e0dbc33630a092ccf033@xxxxxxxxxxxxxxxxxxxxxxxxx Closes: https://lore.kernel.org/linux-usb/00000000000029242706077f3145@xxxxxxxxxx/ Reported-by: syzbot+6867a9777f4b8dc4e256@xxxxxxxxxxxxxxxxxxxxxxxxx Closes: https://lore.kernel.org/linux-usb/0000000000007634c1060793197c@xxxxxxxxxx/ Fixes: b8aaf639b403 ("usbip: Use platform_device_register_full()") Signed-off-by: Hongren Zheng <i@xxxxxxxxxxx> --- drivers/usb/usbip/vhci_hcd.c | 17 +++++++++-------- 1 file changed, 9 insertions(+), 8 deletions(-) diff --git a/drivers/usb/usbip/vhci_hcd.c b/drivers/usb/usbip/vhci_hcd.c index f845b91848b9..dfbdc77108e5 100644 --- a/drivers/usb/usbip/vhci_hcd.c +++ b/drivers/usb/usbip/vhci_hcd.c @@ -1139,8 +1139,7 @@ static int hcd_name_to_id(const char *name) static int vhci_setup(struct usb_hcd *hcd) { - struct vhci *vhci = dev_get_platdata(hcd->self.controller); - + struct vhci *vhci = *((void **)dev_get_platdata(hcd->self.controller)); if (usb_hcd_is_primary_hcd(hcd)) { vhci->vhci_hcd_hs = hcd_to_vhci_hcd(hcd); vhci->vhci_hcd_hs->vhci = vhci; @@ -1257,7 +1256,7 @@ static int vhci_get_frame_number(struct usb_hcd *hcd) /* FIXME: suspend/resume */ static int vhci_bus_suspend(struct usb_hcd *hcd) { - struct vhci *vhci = dev_get_platdata(hcd->self.controller); + struct vhci *vhci = *((void **)dev_get_platdata(hcd->self.controller)); unsigned long flags; dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__); @@ -1271,7 +1270,7 @@ static int vhci_bus_suspend(struct usb_hcd *hcd) static int vhci_bus_resume(struct usb_hcd *hcd) { - struct vhci *vhci = dev_get_platdata(hcd->self.controller); + struct vhci *vhci = *((void **)dev_get_platdata(hcd->self.controller)); int rc = 0; unsigned long flags; @@ -1338,7 +1337,7 @@ static const struct hc_driver vhci_hc_driver = { static int vhci_hcd_probe(struct platform_device *pdev) { - struct vhci *vhci = dev_get_platdata(&pdev->dev); + struct vhci *vhci = *((void **)dev_get_platdata(&pdev->dev)); struct usb_hcd *hcd_hs; struct usb_hcd *hcd_ss; int ret; @@ -1396,7 +1395,7 @@ static int vhci_hcd_probe(struct platform_device *pdev) static void vhci_hcd_remove(struct platform_device *pdev) { - struct vhci *vhci = dev_get_platdata(&pdev->dev); + struct vhci *vhci = *((void **)dev_get_platdata(&pdev->dev)); /* * Disconnects the root hub, @@ -1431,7 +1430,7 @@ static int vhci_hcd_suspend(struct platform_device *pdev, pm_message_t state) if (!hcd) return 0; - vhci = dev_get_platdata(hcd->self.controller); + vhci = *((void **)dev_get_platdata(hcd->self.controller)); spin_lock_irqsave(&vhci->lock, flags); @@ -1506,6 +1505,7 @@ static void del_platform_devices(void) static int __init vhci_hcd_init(void) { int i, ret; + void *vhci; if (usb_disabled()) return -ENODEV; @@ -1522,10 +1522,11 @@ static int __init vhci_hcd_init(void) goto err_driver_register; for (i = 0; i < vhci_num_controllers; i++) { + vhci = &vhcis[i]; struct platform_device_info pdevinfo = { .name = driver_name, .id = i, - .data = &vhcis[i], + .data = &vhci, .size_data = sizeof(void *), }; -- 2.37.2
