| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.4 216/261] gnss: sirf: fix error return code in sirf_probe() | Date | Fri, 19 Jun 2020 16:33:47 +0200 |
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From: Wei Yongjun <weiyongjun1@huawei.com>
commit 43d7ce70ae43dd8523754b17f567417e0e75dbce upstream.
Fix to return a negative error code from the error handling case instead of 0, as done elsewhere in this function.
This avoids a use-after-free in case the driver is later unbound.
Fixes: d2efbbd18b1e ("gnss: add driver for sirfstar-based receivers") Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> [ johan: amend commit message; mention potential use-after-free ] Cc: stable <stable@vger.kernel.org> # 4.19 Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/gnss/sirf.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
--- a/drivers/gnss/sirf.c +++ b/drivers/gnss/sirf.c @@ -439,14 +439,18 @@ static int sirf_probe(struct serdev_devi data->on_off = devm_gpiod_get_optional(dev, "sirf,onoff", GPIOD_OUT_LOW); - if (IS_ERR(data->on_off)) + if (IS_ERR(data->on_off)) { + ret = PTR_ERR(data->on_off); goto err_put_device; + } if (data->on_off) { data->wakeup = devm_gpiod_get_optional(dev, "sirf,wakeup", GPIOD_IN); - if (IS_ERR(data->wakeup)) + if (IS_ERR(data->wakeup)) { + ret = PTR_ERR(data->wakeup); goto err_put_device; + } ret = regulator_enable(data->vcc); if (ret)
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