*** This bug is a security vulnerability ***
Private security bug reported:
Description:
On Ubuntu 16.04 running 4.13.0-32 kernel, when file IO stress is run on
multiple NVMe disks (ext4 partitioned), system hangs with multiple kernel
crashes in the logs.
Steps:
1. Setup a DellEMC AMD servers with a few NVMe disks.
2. Run the file IO stress on these disks for 24 hours.
3. Observe that the system goes un-reponsive after a few mins/hrs.
Additional Info:
* Stress ran fine for 24hrs with 4.12.0-041200-generic.
* Stress ran fine for 13hrs with 4.10.0-28-generic. Had to stop the run
manually due to some other reasons.
* Stress fails with linux-image-4.13.0-25-generic.
Attaching the logs.
Will update here once we have more data.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "kern.log"
https://bugs.launchpad.net/bugs/1749746/+attachment/5055864/+files/kern.log
** Information type changed from Public to Private Security
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https://bugs.launchpad.net/bugs/1749746
Title:
DellEMC AMD servers hang when running IO stress on NVMe disks
Status in linux package in Ubuntu:
New
Bug description:
Description:
On Ubuntu 16.04 running 4.13.0-32 kernel, when file IO stress is run on
multiple NVMe disks (ext4 partitioned), system hangs with multiple kernel
crashes in the logs.
Steps:
1. Setup a DellEMC AMD servers with a few NVMe disks.
2. Run the file IO stress on these disks for 24 hours.
3. Observe that the system goes un-reponsive after a few mins/hrs.
Additional Info:
* Stress ran fine for 24hrs with 4.12.0-041200-generic.
* Stress ran fine for 13hrs with 4.10.0-28-generic. Had to stop the
run manually due to some other reasons.
* Stress fails with linux-image-4.13.0-25-generic.
Attaching the logs.
Will update here once we have more data.
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