[Bug 1948812] [NEW] Bad busybox modinfo output on exactly 3 modules

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Trying on Ubuntu 20.04.3 with linux-modules-5.4.0-88-generic and busybox

    for a in $(find /lib/modules/5.4.0-88-generic/ -name '*.ko')
    do
       [ $(busybox modinfo -F name $a|wc -w) = 1 ] || echo $a
    done

This code should output nothing because every module reports just a
name. Instead it outputs exactly three lines:

    /lib/modules/5.4.0-88-generic/kernel/net/ceph/libceph.ko
    /lib/modules/5.4.0-88-generic/kernel/fs/nfs/nfs.ko
    /lib/modules/5.4.0-88-generic/kernel/zfs/zfs.ko

Let's try them

     $ busybox modinfo -F name /lib/modules/5.4.0-88-generic/kernel/fs/nfs/nfsv4.ko
     nfsv4
This is correct, I put it just for the reference. 


     $ busybox modinfo -F name /lib/modules/5.4.0-88-generic/kernel/net/ceph/libceph.ko

     %s
     libceph
The above incorrectly reports one empty line, one literal %s and the name of the module

     $ busybox modinfo -F name /lib/modules/5.4.0-88-generic/kernel/fs/nfs/nfs.ko
     %02x:%02x:%llu/%s

     nfs
This reports a strange format and empty line and then nfs

     $ busybox modinfo -F name /lib/modules/5.4.0-88-generic/kernel/zfs/zfs.ko 
     %s
     %s creation_txg=%llu target_snap=%llu
     zfs
Yet another strange format


No other module, except those 3, misbehaved when tried to get a name from busybox modinfo

Just for your information I used the busybox from the package busybox
version 1:1.30.1-4ubuntu6.3 amd64 but the very same result was generated
by the latest compiled busybox

** Affects: busybox (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: bot-comment focal
-- 
Bad busybox modinfo output on exactly 3 modules
https://bugs.launchpad.net/bugs/1948812
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