Debian 11.10 find_module undefined

[s90]

Can't build module for 5.10.0-31-amd64 kernel

DKMS make.log for ipt-netflow-2.6-17-g0eb2092 for kernel 5.10.0-31-amd64 (x86_64)
Tue 30 Jul 2024 02:07:03 PM UTC
./gen_compat_def > compat_def.h-
Test function xt_family linux/netfilter_ipv4/ip_tables.h declared
Test struct timeval linux/ktime.h undeclared
Test struct proc_ops linux/proc_fs.h declared
Test function synchronize_sched linux/rcupdate.h undeclared
Test function nf_bridge_info_get linux/netfilter_bridge.h declared
Test struct vlan_dev_priv linux/if_vlan.h declared
Test function put_unaligned_be24 asm/unaligned.h declared
Test function totalram_pages linux/mm.h declared
Test symbol totalram_pages linux/mm.h declared
Test member nf_ct_event_notifier.ct_event net/netfilter/nf_conntrack_ecache.h undeclared
Test function register_sysctl_paths linux/sysctl.h declared
mv compat_def.h- compat_def.h
Compiling 2.6-17-g0eb2092-dirty for kernel 5.10.221
make -C /lib/modules/5.10.0-31-amd64/build M=/var/lib/dkms/ipt-netflow/2.6-17-g0eb2092/build modules
make[1]: warning: jobserver unavailable: using -j1. Add '+' to parent make rule.
make[1]: Entering directory '/usr/src/linux-headers-5.10.0-31-amd64'
CC [M] /var/lib/dkms/ipt-netflow/2.6-17-g0eb2092/build/ipt_NETFLOW.o
MODPOST /var/lib/dkms/ipt-netflow/2.6-17-g0eb2092/build/Module.symvers
ERROR: modpost: "find_module" [/var/lib/dkms/ipt-netflow/2.6-17-g0eb2092/build/ipt_NETFLOW.ko] undefined!
make[3]: *** [/usr/src/linux-headers-5.10.0-31-common/scripts/Makefile.modpost:123: /var/lib/dkms/ipt-netflow/2.6-17-g0eb2092/build/Module.symvers] Error 1
make[3]: *** Deleting file '/var/lib/dkms/ipt-netflow/2.6-17-g0eb2092/build/Module.symvers'
make[2]: *** [/usr/src/linux-headers-5.10.0-31-common/Makefile:1783: modules] Error 2
make[1]: *** [/usr/src/linux-headers-5.10.0-31-common/Makefile:192: __sub-make] Error 2
make[1]: Leaving directory '/usr/src/linux-headers-5.10.0-31-amd64'
make: *** [Makefile:27: ipt_NETFLOW.ko] Error 2

Worked well for previous releases
#dkms status
ipt-netflow, 2.6-17-g0eb2092, 5.10.0-27-amd64, x86_64: installed
ipt-netflow, 2.6-17-g0eb2092, 5.10.0-28-amd64, x86_64: installed
ipt-netflow, 2.6-17-g0eb2092, 5.10.0-30-amd64, x86_64: installed

[s90]

Solution is here

compat.h
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(5,12,0)
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(5,12,0) || LINUX_VERSION_CODE >= KERNEL_VERSION(5,10,220)

[kalamlacki]

Hi,

I have just installed on my VirtualBox Debian 11.10 and git cloned ipt-netflow and compiled/installed without an issue. You have something wrong with your system.

Best regards,
Łukasz

[s90]

Hi,
Even on virtualbox, on fresh OS it doesn't work

Make sure you try on 5.10.0-31 kernel
Anyway I have my solution (see the url above)

[kalamlacki]

Hi,

yes I did try on 5.10.0-31 Linux kernel

Here are commands after install I did

apt install net-tools gcc g++ make git libxtables-dev dkms

git clone https://github.com/aabc/ipt-netflow.git

./configure

make

make install

shared libs for iptables are in wrong dir:
install -D libipt_NETFLOW.so /usr/lib/debug/.dwz/x86_64-linux-gnu/iptables.debug/libipt_NETFLOW.so
install -D libip6t_NETFLOW.so /usr/lib/debug/.dwz/x86_64-linux-gnu/iptables.debug/libip6t_NETFLOW.so

and need to be moved to correct directory but it works

Best,
Łukasz

[kalamlacki]

Test function synchronize_sched linux/rcupdate.h undeclared
Test function nf_bridge_info_get linux/netfilter_bridge.h declared
Test struct vlan_dev_priv linux/if_vlan.h declared
Test function put_unaligned_be24 asm/unaligned.h declared
Test function totalram_pages linux/mm.h declared
Test symbol totalram_pages linux/mm.h declared
Test member nf_ct_event_notifier.ct_event net/netfilter/nf_conntrack_ecache.h undeclared
Test function register_sysctl_paths linux/sysctl.h declared
mv compat_def.h- compat_def.h
Compiling 2.6-17-g0eb2092 for kernel 5.10.221
make -C /lib/modules/5.10.0-31-amd64/build M=/root/ipt-netflow modules
make[1]: Entering directory '/usr/src/linux-headers-5.10.0-31-amd64'
CC [M] /root/ipt-netflow/ipt_NETFLOW.o
MODPOST /root/ipt-netflow/Module.symvers
CC [M] /root/ipt-netflow/ipt_NETFLOW.mod.o
LD [M] /root/ipt-netflow/ipt_NETFLOW.ko
make[1]: Leaving directory '/usr/src/linux-headers-5.10.0-31-amd64'
gcc -O2 -Wall -Wunused -DXTABLES -fPIC -o libipt_NETFLOW_sh.o -c libipt_NETFLOW.c
gcc -shared -o libipt_NETFLOW.so libipt_NETFLOW_sh.o
gcc -O2 -Wall -Wunused -DXTABLES -fPIC -o libip6t_NETFLOW_sh.o -c libipt_NETFLOW.c
gcc -shared -o libip6t_NETFLOW.so libip6t_NETFLOW_sh.o
rm libipt_NETFLOW_sh.o libip6t_NETFLOW_sh.o
root@debian:~/ipt-netflow# make install
*
make -C /lib/modules/5.10.0-31-amd64/build M=/root/ipt-netflow modules_install INSTALL_MOD_PATH=
make[1]: Entering directory '/usr/src/linux-headers-5.10.0-31-amd64'
INSTALL /root/ipt-netflow/ipt_NETFLOW.ko
DEPMOD 5.10.0-31-amd64
Warning: modules_install: missing 'System.map' file. Skipping depmod.
make[1]: Leaving directory '/usr/src/linux-headers-5.10.0-31-amd64'
/sbin/depmod -a
*
install -D libipt_NETFLOW.so /usr/lib/debug/.dwz/x86_64-linux-gnu/iptables.debug/libipt_NETFLOW.so
install -D libip6t_NETFLOW.so /usr/lib/debug/.dwz/x86_64-linux-gnu/iptables.debug/libip6t_NETFLOW.so
*
Installing into DKMS...
! Installing 2.6-17-g0eb2092 into DKMS...

Creating symlink /var/lib/dkms/ipt-netflow/2.6-17-g0eb2092/source ->
/usr/src/ipt-netflow-2.6-17-g0eb2092

DKMS: add completed.
root@debian:~/ipt-netflow# cd ipt-netflow/

[s90]

Oh, I got the difference - if ./configure then all's good, if ./configure --enable-natevents then "find_module undefined"
Try with natevents

[kalamlacki]

Hi,

Yes you are right --enable-natevents makes the difference.

Best regards,
Łukasz