Public bug reported:
We have discovered a critical memory leak in the i915 DRM driver on Ubuntu
24.04.4 LTS running kernel 6.17.0-14-generic (HWE kernel). The i915 driver's
GEM buffers, allocated via the shmem (shared memory) mechanism, continuously
accumulate and are never reclaimed, eventually consuming ~14.9 GB of physical
memory (93% of 16 GB RAM) and triggering repeated OOM Killer invocations that
render the system unusable.This issue can be circumvented by not load the i915
driver.
Hardware Environment
--------------------
- CPU: 12th Gen Intel Core i3-12100 (Alder Lake-S)
- GPU: Intel Alder Lake-S GT1 [UHD Graphics 730], PCI ID 8086:4692, Rev
0c(Other display chips don't exhibit this bug)
- RAM: 16 GB DDR5 4800 MT/s (Transcend TS2GLA64V8E, 1/4 slots populated)
- BIOS: INSYDE Corp. VS01GSIAM0101 (Release Date: 2025-01-16)
- OS: Ubuntu 24.04.4 LTS (Noble Numbat)
- Kernel: 6.17.0-14-generic #14~24.04.1-Ubuntu SMP PREEMPT_DYNAMIC (GCC 13.3.0)
- GPU Driver: i915 1.6.0 | GuC 70.36.0 (submission disabled)
| HuC 7.9.3 (authenticated) | DMC v2.1
Reproduction Steps
------------------
The reproduction method is simple: install Ubuntu 24.04.4 desktop x86 on the
target device, configure the IP after installation, use a script to monitor
memory usage, lock the screen, and wait until the issue occurs. The shmem usage
increases by a few hundred MB per hour. But all shmem is released after logging
into the screen. Restarting the GNOME graphical interface by executing
/bin/systemctl restart gdm on the ttySx serial port also releases all shmem.
With only the above operations performed, and no other deb packages or GNOME
extensions installed, running stress --cpu 8 appears to accelerate the
reproduction of the issue.
** Affects: gnome-shell (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "collect_20260720_232944.zip"
https://bugs.launchpad.net/bugs/2162559/+attachment/5988240/+files/collect_20260720_232944.zip
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https://bugs.launchpad.net/bugs/2162559
Title:
i915 DRM driver memory leak
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