From b96845b63204336a0e05a1b1c27cb02d626d4f5d Mon Sep 17 00:00:00 2001
From: Uglymotha <uglymotha@wizdom.nu>
Date: Tue, 5 Nov 2024 01:44:38 +0100
Subject: [PATCH] Verify parent_dev before calling
 udev_device_get_sysattr_value

Not all udev devices have parent devices.
Calling udev_device_get_ functions yield an assertion error
if called with a NULL pointer.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Sietse <sietse@wizdom.nu>
Co-authored-by: Sietse <sietse@wizdom.nu>
Closes #16705
Closes #16717
---
 cmd/zed/zed_disk_event.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/cmd/zed/zed_disk_event.c b/cmd/zed/zed_disk_event.c
index 32a8789d3001..4a2b7398e922 100644
--- a/cmd/zed/zed_disk_event.c
+++ b/cmd/zed/zed_disk_event.c
@@ -139,7 +139,8 @@ dev_event_nvlist(struct udev_device *dev)
 		 * is /dev/sda.
 		 */
 		struct udev_device *parent_dev = udev_device_get_parent(dev);
-		if ((value = udev_device_get_sysattr_value(parent_dev, "size"))
+		if (parent_dev != NULL &&
+		    (value = udev_device_get_sysattr_value(parent_dev, "size"))
 		    != NULL) {
 			uint64_t numval = DEV_BSIZE;