This is a note to let you know that I've just added the patch titled

gnss: sirf: fix error return code in sirf_probe()

to my char-misc git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git in the char-misc-testing branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will be merged to the char-misc-next branch sometime soon, after it passes testing, and the merge window is open.

If you have any questions about this process, please let me know.

From 43d7ce70ae43dd8523754b17f567417e0e75dbce Mon Sep 17 00:00:00 2001

From: Wei Yongjun weiyongjun1@huawei.com Date: Thu, 7 May 2020 09:42:52 +0000 Subject: gnss: sirf: fix error return code in sirf_probe()

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 --- drivers/gnss/sirf.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/gnss/sirf.c b/drivers/gnss/sirf.c index effed3a8d398..2ecb1d3e8eeb 100644 --- a/drivers/gnss/sirf.c +++ b/drivers/gnss/sirf.c @@ -439,14 +439,18 @@ static int sirf_probe(struct serdev_device *serdev)

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)