From: Jozef Martiniak <jomajm@xxxxxxxxx> [ Upstream commit 04cb742d4d8f30dc2e83b46ac317eec09191c68e ] after usb_ep_queue() if wait_for_completion_interruptible() is interrupted we need to wait until IRQ gets finished. Otherwise complete() from epio_complete() can corrupt stack. Signed-off-by: Jozef Martiniak <jomajm@xxxxxxxxx> Link: https://lore.kernel.org/r/20220708070645.6130-1-jomajm@xxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/usb/gadget/legacy/inode.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/usb/gadget/legacy/inode.c b/drivers/usb/gadget/legacy/inode.c index 79990597c39f..01c3ead7d1b4 100644 --- a/drivers/usb/gadget/legacy/inode.c +++ b/drivers/usb/gadget/legacy/inode.c @@ -362,6 +362,7 @@ ep_io (struct ep_data *epdata, void *buf, unsigned len) spin_unlock_irq (&epdata->dev->lock); DBG (epdata->dev, "endpoint gone\n"); + wait_for_completion(&done); epdata->status = -ENODEV; } } -- 2.35.1
