Ubuntu
linux package

bug in module cx18

Bug #2073367 reported by Tom Hahn on 2024-07-17

This bug affects 1 person

Affects		Status	Importance	Assigned to	Milestone
	linux (Ubuntu)	Triaged	High	AaronMa

Bug Description

tv card Hauppauge HVR 1600 not working probably because of this.
several array-index-out-of-bounds in dmesg regarding cx18-streams.c and cx18-queue.c

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: linux-image-6.8.0-38-generic 6.8.0-38.38
ProcVersionSignature: Ubuntu 6.8.0-38.38-generic 6.8.8
Uname: Linux 6.8.0-38-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version k6.8.0-38-generic.
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.28.1-0ubuntu3
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/timer', '/dev/snd/seq', '/dev/snd/pcmC0D0p', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D3p', '/dev/snd/pcmC0D7p', '/dev/snd/pcmC0D8p', '/dev/snd/hwC0D0', '/dev/snd/hwC0D2', '/dev/snd/controlC0', '/dev/snd/by-path', '/dev/snd/pcmC1D0c', '/dev/snd/controlC1'] failed with exit code 1:
CRDA: N/A
Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer'
Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer'
Card1.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer'
Card1.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer'
CasperMD5CheckResult: pass
Date: Wed Jul 17 05:48:46 2024
InstallationDate: Installed on 2024-07-12 (5 days ago)
InstallationMedia: Ubuntu-Server 24.04 LTS "Noble Numbat" - Release amd64 (20240423)
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
Lsusb:
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Lsusb-t:
/: Bus 001.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/16p, 480M
/: Bus 002.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/10p, 10000M
MachineType: Dell Inc. Precision 3630 Tower
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcFB:

ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.8.0-38-generic root=UUID=54d1671f-8bdd-443b-9090-b92da043658e ro
RelatedPackageVersions:
linux-restricted-modules-6.8.0-38-generic N/A
linux-backports-modules-6.8.0-38-generic N/A
linux-firmware 20240318.git3b128b60-0ubuntu2.1
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/03/2024
dmi.bios.release: 2.29
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 2.29.0
dmi.board.name: 0NNNCT
dmi.board.vendor: Dell Inc.
dmi.board.version: A01
dmi.chassis.type: 3
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr2.29.0:bd06/03/2024:br2.29:svnDellInc.:pnPrecision3630Tower:pvr:rvnDellInc.:rn0NNNCT:rvrA01:cvnDellInc.:ct3:cvr:sku0871:
dmi.product.family: Precision
dmi.product.name: Precision 3630 Tower
dmi.product.sku: 0871
dmi.sys.vendor: Dell Inc.

Tags:

Revision history for this message

Tom Hahn (thhb) wrote on 2024-07-17:

AlsaDevices.txt Edit (698 bytes, text/plain; charset="utf-8")
Card0.Codecs.codec.0.txt Edit (9.8 KiB, text/plain; charset="utf-8")
Card0.Codecs.codec.2.txt Edit (2.9 KiB, text/plain; charset="utf-8")
CurrentDmesg.txt Edit (101.2 KiB, text/plain; charset="utf-8")
Dependencies.txt Edit (3.9 KiB, text/plain; charset="utf-8")
Lspci.txt Edit (34.7 KiB, text/plain; charset="utf-8")
Lspci-vt.txt Edit (1.3 KiB, text/plain; charset="utf-8")
Lsusb-v.txt Edit (7.4 KiB, text/plain; charset="utf-8")
PciMultimedia.txt Edit (1.9 KiB, text/plain; charset="utf-8")
ProcCpuinfo.txt Edit (8.9 KiB, text/plain; charset="utf-8")
ProcCpuinfoMinimal.txt Edit (1.5 KiB, text/plain; charset="utf-8")
ProcInterrupts.txt Edit (3.8 KiB, text/plain; charset="utf-8")
ProcModules.txt Edit (9.2 KiB, text/plain; charset="utf-8")
UdevDb.txt Edit (295.0 KiB, text/plain; charset="utf-8")
WifiSyslog.txt Edit (114.8 KiB, text/plain; charset="utf-8")
acpidump.txt Edit (1.5 MiB, text/plain; charset="utf-8")

Revision history for this message

AaronMa (mapengyu) wrote on 2024-07-18:

Looks like the array is overflow for the definition:

struct cx18_mdl_ent cpu_mdl[1];

It can be simply tested by increased 1 to 1024 or more.
But I am not sure how much buffer the driver want to use,
can we file an upstream bug to notify the driver maintainer?

Changed in linux (Ubuntu):
status:	New → Triaged
importance:	Undecided → High
assignee:	nobody → AaronMa (mapengyu)

Revision history for this message

Juerg Haefliger (juergh) wrote on 2024-07-18:

It's a warning for an incorrectly declared flexible array [1]. It shouldn't cause any issues other than the stack traces. In newer kernels, a new pedantic gcc flag is used which causes this [2].

[1] https://elixir.bootlin.com/linux/v6.8/source/drivers/media/pci/cx18/cx18-scb.h#L261
[2] https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays