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gadgetfs: ep_io - wait until IRQ finishes

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[ 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@gmail.com>
Link: https://lore.kernel.org/r/20220708070645.6130-1-jomajm@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jozef Martiniak 2022-07-08 09:06:44 +02:00 committed by Greg Kroah-Hartman
parent 4203b76abe
commit 77040efe59
1 changed files with 1 additions and 0 deletions
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drivers/usb/gadget/legacy/inode.c
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@ -361,6 +361,7 @@ 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;
}
}