5.4-stable review patch. If anyone has any objections, please let me know.
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From: Joe Hattori joe@pf.is.s.u-tokyo.ac.jp
commit 64f43895b4457532a3cc524ab250b7a30739a1b1 upstream.
In the error path of iio_channel_get_all(), iio_device_put() is called on all IIO devices, which can cause a refcount imbalance. Fix this error by calling iio_device_put() only on IIO devices whose refcounts were previously incremented by iio_device_get().
Fixes: 314be14bb893 ("iio: Rename _st_ functions to loose the bit that meant the staging version.") Signed-off-by: Joe Hattori joe@pf.is.s.u-tokyo.ac.jp Link: https://patch.msgid.link/20241204111342.1246706-1-joe@pf.is.s.u-tokyo.ac.jp Cc: Stable@vger.kernel.org Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/iio/inkern.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/iio/inkern.c +++ b/drivers/iio/inkern.c @@ -466,7 +466,7 @@ struct iio_channel *iio_channel_get_all( return chans;
error_free_chans: - for (i = 0; i < nummaps; i++) + for (i = 0; i < mapind; i++) iio_device_put(chans[i].indio_dev); kfree(chans); error_ret: