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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
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Bad busybox modinfo output on exactly 3 modules
https://bugs.launchpad.net/bugs/1948812
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