Why I did it
SONiC will report the kernel dump while system reboot in Belgite platform as the following shows:
How I did it
Cause:
Invalid cdev container pointer from the inode is being accessing in misc
device open, which causes a memory corruption in the slub.
Because of the slub corruption, random crash is seen during reboot.
Fix: - Instead of cdev pointer from the inode, mdev container pointer is
used from the file->privdate_data member.
Action: update the pddf_custom_wdt driver,
How to verify it
Do the reboot stress test to check whether there is kernel dump during reboot progress
7fb8bf7012