patch "iio: imu: adis: Fix NULL pointer dereference in adis_init" added to char-misc-linus

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

iio: imu: adis: Fix NULL pointer dereference in adis_init

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 9990cd4f8827bd1ae3fb6eb7407630d8d463c430 Mon Sep 17 00:00:00 2001
From: Radu Sabau <[email protected]>
Date: Fri, 20 Feb 2026 16:16:41 +0200
Subject: iio: imu: adis: Fix NULL pointer dereference in adis_init

The adis_init() function dereferences adis->ops to check if the individual function pointers (write, read, reset) are NULL, but does not first check if adis->ops itself is NULL.

Drivers like adis16480, adis16490, adis16545 and others do not set custom ops and rely on adis_init() assigning the defaults. Since struct adis is zero-initialized by devm_iio_device_alloc(), adis->ops is NULL when adis_init() is called, causing a NULL pointer dereference:

    Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
    pc : adis_init+0xc0/0x118
    Call trace:
     adis_init+0xc0/0x118
     adis16480_probe+0xe0/0x670

Fix this by checking if adis->ops is NULL before dereferencing it, falling through to assign the default ops in that case.

---
 drivers/iio/imu/adis.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index d160147cce0b..a2bc1d14ed91 100644
@@ -526,7 +526,7 @@ int adis_init(struct adis *adis, struct iio_dev *indio_dev,
 
 	adis->spi = spi;
 	adis->data = data;
-	if (!adis->ops->write && !adis->ops->read && !adis->ops->reset)
+	if (!adis->ops)
 		adis->ops = &adis_default_ops;
 	else if (!adis->ops->write || !adis->ops->read || !adis->ops->reset)
 		return -EINVAL;

2.53.0