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mfd: wm831x-auxadc: Prevent use after free in wm831x_auxadc_read_irq()
The "req" struct is always added to the "wm831x->auxadc_pending" list,
but it's only removed from the list on the success path. If a failure
occurs then the "req" struct is freed but it's still on the list,
leading to a use after free.
Fixes: 78bb3688ea
("mfd: Support multiple active WM831x AUXADC conversions")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
parent
6a8fac01dc
commit
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@ -93,11 +93,10 @@ static int wm831x_auxadc_read_irq(struct wm831x *wm831x,
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wait_for_completion_timeout(&req->done, msecs_to_jiffies(500));
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mutex_lock(&wm831x->auxadc_lock);
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list_del(&req->list);
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ret = req->val;
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out:
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list_del(&req->list);
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mutex_unlock(&wm831x->auxadc_lock);
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kfree(req);
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