Public bug reported:
Ubuntu kernel 7.0.0-30-generic repeatedly crashes during sustained
NVIDIA CUDA/AI training workload.
kdump successfully captured the crash.
The crash contains:
UBSAN: array-index-out-of-bounds in
drivers/iommu/dma-iommu.c:193:25
index -1523926064 is out of range for type 'long unsigned int [8192]'
BUG: unable to handle page fault for address: fffffffcd2dccf60
Oops: Oops: 0000 [#1] SMP NOPTI
RIP: fq_flush_timeout+0x57/0x120
CPU: 3 UID: 1000 PID: 12348 Comm: python
Hardware:
MSI PRO Z890-P WIFI (MS-7E34)
NVIDIA GPU PCI ID 10de:2684
NVIDIA open kernel module 580.173.02
The failure is reproducible under AI training load and has caused
multiple unclean reboots.
A kdump from the latest occurrence is available at:
/var/crash/202608271339/
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-image-7.0.0-30-generic 7.0.0-30.30
ProcVersionSignature: Ubuntu 7.0.0-30.30-generic 7.0.12
Uname: Linux 7.0.0-30-generic x86_64
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/controlC1',
'/dev/snd/hwC1D2', '/dev/snd/hwC1D0', '/dev/snd/pcmC1D9p', '/dev/snd/pcmC1D8p',
'/dev/snd/pcmC1D7p', '/dev/snd/pcmC1D3p', '/dev/snd/pcmC1D2c',
'/dev/snd/pcmC1D0c', '/dev/snd/pcmC1D0p', '/dev/snd/by-path',
'/dev/snd/controlC0', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D9p',
'/dev/snd/pcmC0D8p', '/dev/snd/pcmC0D7p', '/dev/snd/pcmC0D3p', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Thu Aug 27 13:46:04 2026
InstallationDate: Installed on 2026-02-24 (184 days ago)
InstallationMedia: Ubuntu 25.10 "Questing Quokka" - Release amd64 (20251007)
MachineType: Micro-Star International Co., Ltd. MS-7E34
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcFB:
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-30-generic
root=UUID=2559f3ff-5281-4fdf-ac70-83f5c8203c91 ro quiet splash
crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M
SourcePackage: linux
UpgradeStatus: Upgraded to resolute on 2026-08-03 (24 days ago)
dmi.bios.date: 03/05/2026
dmi.bios.release: 5.32
dmi.bios.vendor: American Megatrends International, LLC.
dmi.bios.version: 1.AC1
dmi.board.asset.tag: Default string
dmi.board.name: PRO Z890-P WIFI (MS-7E34)
dmi.board.vendor: Micro-Star International Co., Ltd.
dmi.board.version: 1.0
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Micro-Star International Co., Ltd.
dmi.chassis.version: 1.0
dmi.modalias:
dmi:bvnAmericanMegatrendsInternational,LLC.:bvr1.AC1:bd03/05/2026:br5.32:svnMicro-StarInternationalCo.,Ltd.:pnMS-7E34:pvr1.0:rvnMicro-StarInternationalCo.,Ltd.:rnPROZ890-PWIFI(MS-7E34):rvr1.0:cvnMicro-StarInternationalCo.,Ltd.:ct3:cvr1.0:skuDefaultstring:pfaDefaultstring:
dmi.product.family: Default string
dmi.product.name: MS-7E34
dmi.product.sku: Default string
dmi.product.version: 1.0
dmi.sys.vendor: Micro-Star International Co., Ltd.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute wayland-session
** Attachment added: "dmesg logs"
https://bugs.launchpad.net/bugs/2165247/+attachment/5995800/+files/kernel-crash-dmesg.txt
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https://bugs.launchpad.net/bugs/2165247
Title:
dma-iommu.c kernel crash
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