This is a note to let you know that I've just added the patch titled
iio: inkern: call iio_device_put() only on mapped devices
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-linus 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 hopefully also be merged in Linus's tree for the next -rc kernel release.
If you have any questions about this process, please let me know.
From 64f43895b4457532a3cc524ab250b7a30739a1b1 Mon Sep 17 00:00:00 2001 From: Joe Hattori joe@pf.is.s.u-tokyo.ac.jp Date: Wed, 4 Dec 2024 20:13:42 +0900 Subject: iio: inkern: call iio_device_put() only on mapped devices
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 --- drivers/iio/inkern.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c index 136b225b6bc8..9050a59129e6 100644 --- a/drivers/iio/inkern.c +++ b/drivers/iio/inkern.c @@ -500,7 +500,7 @@ struct iio_channel *iio_channel_get_all(struct device *dev) return_ptr(chans);
error_free_chans: - for (i = 0; i < nummaps; i++) + for (i = 0; i < mapind; i++) iio_device_put(chans[i].indio_dev); return ERR_PTR(ret); }