linux-firmware upgrade started failing

[Leonardo Müller]

It was observed that linux-firmware upgrade started failing now. At the end of the apt upgrade process, the following message appeared (messages are in Portuguese):

Erros foram encontrados durante o processamento de:
 /tmp/apt-dpkg-install-WX2tyT/55-linux-firmware_20220314.gitcd01f857-0ubuntu1_all.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

In the middle of the upgrade process, there was the following error:

A descompactar linux-firmware (20220314.gitcd01f857-0ubuntu1) sobre (20220302.gitee0667aa-0ubuntu1) ...
dpkg: erro ao processar o arquivo /tmp/apt-dpkg-install-WX2tyT/55-linux-firmware_20220314.gitcd01f857-0ubuntu1_all.deb (--unpack):
 não foi possível abrir '/lib/firmware/ath11k/WCN6855/hw2.0/regdb.bin.dpkg-new': Arquivo ou diretório inexistente
No apport report written because the error message indicates an issue on the local system
                                                                                         update-initramfs: Generating /boot/initrd.img-5.15.0-22-generic

The suspect I have is that linux-firmware started requiring an executable /tmp. This computer has the following /tmp mount:

tmpfs on /tmp type tmpfs (rw,nosuid,nodev,noexec,relatime,inode64)

Considering dpkg/apt are already privileged processes, I find it strange it tries to extract and execute from /tmp when it could, theoretically, do this from another, safer, directory made specifically for dpkg/apt.

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: linux-firmware 20220302.gitee0667aa-0ubuntu1
ProcVersionSignature: Ubuntu 5.15.0-22.22-generic 5.15.19
Uname: Linux 5.15.0-22-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu79
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: usuario 2559 F.... pipewire
                      usuario 2560 F.... wireplumber
 /dev/snd/pcmC0D0p: usuario 2559 F...m pipewire
 /dev/snd/seq: usuario 2559 F.... pipewire
CasperMD5CheckResult: unknown
CurrentDesktop: XFCE
Date: Mon Mar 14 20:43:31 2022
Dependencies: firmware-sof-signed 2.0-1ubuntu2
HibernationDevice: RESUME=none
InstallationDate: Installed on 2017-06-13 (1735 days ago)
InstallationMedia: Xubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
MachineType: LENOVO 80UG
PackageArchitecture: all
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.15.0-22-generic root=UUID=6b4ae5c0-c78c-49a6-a1ba-029192618a7a ro quiet kvm.ignore_msrs=1 kvm.report_ignored_msrs=0 kvm.halt_poll_ns=0 kvm.halt_poll_ns_grow=0 i915.enable_gvt=1 nbd.nbds_max=2 nbd.max_part=127 mtrr_gran_size=128M mtrr_chunk_size=256M log_buf_len=128M zswap.enabled=1 zswap.zpool=z3fold usbhid.quirks=0x0079:0x0006:0x100000
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
 linux-restricted-modules-5.15.0-22-generic N/A
 linux-backports-modules-5.15.0-22-generic N/A
 linux-firmware 20220302.gitee0667aa-0ubuntu1
SourcePackage: linux-firmware
UpgradeStatus: Upgraded to jammy on 2019-12-22 (813 days ago)
dmi.bios.date: 08/09/2018
dmi.bios.release: 1.45
dmi.bios.vendor: LENOVO
dmi.bios.version: 0XCN45WW
dmi.board.asset.tag: NO Asset Tag
dmi.board.name: Toronto 4A2
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40679 WIN
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo ideapad 310-14ISK
dmi.ec.firmware.release: 1.45
dmi.modalias: dmi:bvnLENOVO:bvr0XCN45WW:bd08/09/2018:br1.45:efr1.45:svnLENOVO:pn80UG:pvrLenovoideapad310-14ISK:rvnLENOVO:rnToronto4A2:rvrSDK0J40679WIN:cvnLENOVO:ct10:cvrLenovoideapad310-14ISK:skuLENOVO_MT_80UG_BU_idea_FM_Lenovoideapad310-14ISK:
dmi.product.family: IDEAPAD
dmi.product.name: 80UG
dmi.product.sku: LENOVO_MT_80UG_BU_idea_FM_Lenovo ideapad 310-14ISK
dmi.product.version: Lenovo ideapad 310-14ISK
dmi.sys.vendor: LENOVO
modified.conffile..etc.cron.daily.apport: [deleted]