patch "iio: frequency: adf4377: Fully initialize clk_init_data and" added to char-misc-linus

patch "iio: frequency: adf4377: Fully initialize clk_init_data and" added to char-misc-linus

[gregkh]

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

    iio: frequency: adf4377: Fully initialize clk_init_data and

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 e787fd23d5063c61582c3c27522240b6e6703fde Mon Sep 17 00:00:00 2001
From: Geert Uytterhoeven <geert+renesas@glider.be>
Date: Thu, 20 Aug 2026 11:19:52 +0200
Subject: iio: frequency: adf4377: Fully initialize clk_init_data and
 clk_parent_data

The clk_init_data structure contains several mutually-exclusive members
for different methods to specify the possible parents of a clock,
prompting drivers to initialize only the members they need.  However,
not initializing all members may cause subtle issues, which are only
exposed when CONFIG_INIT_STACK_ALL_PATTERN or CONFIG_INIT_STACK_NONE is
enabled.

adf4377_clk_register() fills in init.parent_data, and assumes that
init.parent_names is NULL.  However, the latter is uninitialized, and
thus may cause a crash.

Similarly, adf4377_clk_register() fills in only parent_data.fw_name,
leaving other members of the clk_parent_data structure uninitialized.

Make sure all members are fully initialized, to fix such bugs, and to
avoid future breakage when converting drivers to a different method for
specifying the parents.

Fixes: 60e5448ddbec2dc2 ("iio: frequency: adf4377: add clk provider support")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Brian Masney <bmasney@redhat.com>
Reviewed-by: Joshua Crofts <joshua.crofts1@gmail.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <jonathan.cameron@oss.qualcomm.com>
---
 drivers/iio/frequency/adf4377.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/iio/frequency/adf4377.c b/drivers/iio/frequency/adf4377.c
index 4dd19a9aa994..7385be62fa6a 100644
--- a/drivers/iio/frequency/adf4377.c
+++ b/drivers/iio/frequency/adf4377.c
@@ -988,10 +988,10 @@ static const struct clk_ops adf4377_clk_ops = {
 
 static int adf4377_clk_register(struct adf4377_state *st)
 {
+	struct clk_parent_data parent_data = { };
 	struct spi_device *spi = st->spi;
 	struct device *dev = &spi->dev;
-	struct clk_init_data init;
-	struct clk_parent_data parent_data;
+	struct clk_init_data init = { };
 	int ret;
 
 	if (!device_property_present(dev, "#clock-cells"))
-- 
2.55.0