[Pkg-nagios-devel] Bug#1029720: Bug

[Markus Köberl]

Some new kernel include the string starting with "Linux version" 2 times in the vmlinuz- image.
While the first line ends for example with "# SMP PREEMPT_DYNAMIC.*" missing the "1" as mentioned in this bug report the 2nd line matches the /proc/version string exactly.
Therefore changing the filter "head -n1" to "tail -n1" would fix it for a bookworm kernel.
This works with kernels for buster, bullseye and bookworm.

For kernels from other repositories for surface and proxmox another change is necessary to support zst compression.
But for the proxmox kernel the "tail -n1" does not solve the problem because the "Linux version" string in the vmlinuz- image ends with 
" ()" which is not included in /proc/version

Therefore the following patch does not solve all problems but still might help finding a better solution:

136c136
<               echo "UNKNOWN: filter command '$filter' missing, perhaps install xz-utils, lz4 or lzop?" >&2
---
>               echo "UNKNOWN: filter command '$filter' missing, perhaps install xz-utils, lz4, lzop or zstd?" >&2
164a165,166
>       # zst compressed image
>       cat_vmlinux "$image" "\x28\xb5\x2f\xfd"      "zstdcat"  0
204c206
<                       on_disk_version="`get_image_linux "$on_disk" | $STRINGS | grep 'Linux version' | head -n1`"
---
>                       on_disk_version="`get_image_linux "$on_disk" | $STRINGS | grep 'Linux version' | tail -n1`"


Successfully tested with:
linux-image-4.19.0-23-amd64
linux-image-6.0.0-0.deb11.6-amd64
linux-image-6.1.0-5-amd64
linux-image-6.1.13-surface

But does not help with:
pve-kernel-5.15.85-1-pve


regards
Markus Köberl
-- 
Markus Koeberl
Graz University of Technology
Signal Processing and Speech Communication Laboratory
E-mail: markus.koeberl at tugraz.at
-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/pkcs7-signature
Size: 5849 bytes
Desc: not available
URL: <http://alioth-lists.debian.net/pipermail/pkg-nagios-devel/attachments/20230301/736a1f3e/attachment.bin>