System hung and the oldest 'D' state process was blocked in 'do_exit()'
Issue
- System is not responding and sshd doesn't work as well
- Generated vmcore shows long blocked D state tasks
Environment
- Red Hat Enterprise Linux 7
- 3rd party modules loaded
- symev_custom_3_10_0_1127_19_1_el7_x86_64
- symap_custom_3_10_0_1127_19_1_el7_x86_64
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