RHEL6: Oops from kernel NULL pointer dereference in ext4_clear_inode()

Solution In Progress - Updated -

Issue

  • Server crashed with a kernel panic from an kernel NULL pointer dereference in ext4_clear_inode()
  • prior to the panic, we see VFS: Busy inodes after unmount of dm-286. Self-destruct in 5 seconds. Have a nice day...
  • An HA failover was being performed using 3rd-party clustering software. During the attempted failover, the cluster package providing an NFS export was started/stopped multiple times unsuccessfully. Finally the admin began doing "umount -l" to unmount the filesystems.

Environment

Red Hat Enterprise Linux (RHEL) 6.2
kernel-2.6.32-220.23.1.el6.x86_64

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more.

Current Customers and Partners

Log in for full access

Log In

New to Red Hat?

Learn more about Red Hat subscriptions

Using a Red Hat product through a public cloud?

How to access this content