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Bug#1112541: linux: initrd grew significantly from 6.12.38+deb13 to 6.16.3+deb14 causing ENOSPACE

Source: linux
Version: 6.16.3-1
Severity: normal

Hi,
Not sure if this is actionable and indeed beyond expectations, but just in case this points at a problem in the packaging. Feel free to close if I just need to deal with this. 

I just upgraded my forky system and the upgrade failed:
update-initramfs: Generating /boot/initrd.img-6.16.3+deb14-amd64
zstd: error 70 : Write error : cannot write block : No space left on device
E: mkinitramfs failure zstd -q -9 -T0 70
update-initramfs: failed for /boot/initrd.img-6.16.3+deb14-amd64 with 1.
run-parts: /etc/kernel/postinst.d/initramfs-tools exited with return code 1
dpkg: error processing package linux-image-6.16.3+deb14-amd64 (--configure):
installed linux-image-6.16.3+deb14-amd64 package post-installation script subprocess returned error exit status 1 
Setting up linux-libc-dev (6.16.3-1) ...
dpkg: dependency problems prevent configuration of linux-image-amd64:
linux-image-amd64 depends on linux-image-6.16.3+deb14-amd64 (= 6.16.3-1); however: 
  Package linux-image-6.16.3+deb14-amd64 is not configured yet.

dpkg: error processing package linux-image-amd64 (--configure):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 linux-image-6.16.3+deb14-amd64
 linux-image-amd64
Error: Sub-process /usr/bin/dpkg returned an error code (1)
I don't have a big /boot system, as the default boot partition used to be (way too) small. I recall that I once enable something to only install required modules into the initrd, which helped me along until today. 

/boot right after upgrade:
paul@toba ~ $ df -h /boot
Filesystem      Size  Used Avail Use% Mounted on
/dev/nvme0n1p2  456M  281M  151M  66% /boot
paul@toba ~ $ ls -al /boot/
total 273416
drwxr-xr-x  5 root root      1024 Aug 30 17:32 .
drwxr-xr-x 18 root root      4096 Aug 30 17:31 ..
-rw-r--r--  1 root root    283225 Jul  3 21:01 config-6.12.35+deb13-amd64
-rw-r--r--  1 root root    283270 Jul 16 09:13 config-6.12.38+deb13-amd64
-rw-r--r--  1 root root    289665 Aug 24 23:29 config-6.16.3+deb14-amd64
drwx------  3 root root      4096 Jan  1  1970 efi
drwxr-xr-x  5 root root      1024 Aug 20 18:36 grub
-rw-r--r-- 1 root root 120238850 Jul 22 19:33 initrd.img-6.12.35+deb13-amd64 -rw-r--r-- 1 root root 120394731 Aug 30 08:39 initrd.img-6.12.38+deb13-amd64 
drwx------  2 root root     12288 Nov 17  2024 lost+found
-rw-r--r-- 1 root root 83 Jul 3 21:01 System.map-6.12.35+deb13-amd64 -rw-r--r-- 1 root root 83 Jul 16 09:13 System.map-6.12.38+deb13-amd64 
-rw-r--r--  1 root root        92 Aug 24 23:29 System.map-6.16.3+deb14-amd64
-rw-r--r--  1 root root  12093376 Jul  3 21:01 vmlinuz-6.12.35+deb13-amd64
-rw-r--r--  1 root root  12097472 Jul 16 09:13 vmlinuz-6.12.38+deb13-amd64
-rw-r--r--  1 root root  13162432 Aug 24 23:29 vmlinuz-6.16.3+deb14-amd64

/boot after $(sudo apt remove linux-image-6.12.35+deb13-amd64):
paul@toba ~ $ df -h /boot
Filesystem      Size  Used Avail Use% Mounted on
/dev/nvme0n1p2  456M  337M   95M  79% /boot
paul@toba ~ $ ls -al /boot/
total 330986
drwxr-xr-x  5 root root      1024 Aug 30 17:36 .
drwxr-xr-x 18 root root      4096 Aug 30 17:35 ..
-rw-r--r--  1 root root    283270 Jul 16 09:13 config-6.12.38+deb13-amd64
-rw-r--r--  1 root root    289665 Aug 24 23:29 config-6.16.3+deb14-amd64
drwx------  3 root root      4096 Jan  1  1970 efi
drwxr-xr-x  5 root root      1024 Aug 30 17:36 grub
-rw-r--r-- 1 root root 120394731 Aug 30 08:39 initrd.img-6.12.38+deb13-amd64 
-rw-r--r--  1 root root 191341702 Aug 30 17:36 initrd.img-6.16.3+deb14-amd64
drwx------  2 root root     12288 Nov 17  2024 lost+found
-rw-r--r-- 1 root root 83 Jul 16 09:13 System.map-6.12.38+deb13-amd64 
-rw-r--r--  1 root root        92 Aug 24 23:29 System.map-6.16.3+deb14-amd64
-rw-r--r--  1 root root  12097472 Jul 16 09:13 vmlinuz-6.12.38+deb13-amd64
-rw-r--r--  1 root root  13162432 Aug 24 23:29 vmlinuz-6.16.3+deb14-amd64

Note the increase from 120394731 to 191341702 for the initrd.

Paul

-- System Information:
Debian Release: forky/sid
  APT prefers testing
  APT policy: (990, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 6.12.38+deb13-amd64 (SMP w/12 CPU threads; PREEMPT)
Kernel taint flags: TAINT_WARN
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en 
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

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