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Verify parent_dev before calling udev_device_get_sysattr_value

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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
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Uglymotha 2024-11-05 01:44:38 +01:00 committed by GitHub
parent b16e096198
commit c8aed9f973
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1 changed files with 2 additions and 1 deletions
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3
cmd/zed/zed_disk_event.c
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@ -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;