I cannot confirm this with the 5.8.0-12 kernel. Eg, with the 5.4 kernel
in groovy, things work fine:
$ cat /proc/version_signature
Ubuntu 5.4.0-42.46-generic 5.4.44
$ sudo modprobe iptable_filter
$ sudo modprobe ip6table_filter
$ lsmod|grep table_filter
ip6table_filter 16384 0
ip6_tables 32768 1 ip6table_filter
iptable_filter 16384 0
ip_tables 32768 1 iptable_filter
x_tables 40960 4
ip6table_filter,iptable_filter,ip6_tables,ip_tables
and booting into the current 5.8 kernel in groovy-proposed, it still
works ok:
$ cat /proc/version_signature
Ubuntu 5.8.0-12.13-generic 5.8.0-rc7
$ lsmod|grep table_filter
$ sudo modprobe iptable_filter
$ sudo modprobe ip6table_filter
$ lsmod|grep table_filter
ip6table_filter 16384 0
ip6_tables 32768 1 ip6table_filter
iptable_filter 16384 0
ip_tables 32768 1 iptable_filter
x_tables 45056 4
ip6table_filter,iptable_filter,ip6_tables,ip_tables
I upgraded to this kernel by using 'sudo apt-get install linux-generic'.
Did you fetch all the necessary packages?
Eg, in my non-secure-boot VM:
ii linux-generic 5.8.0.12.14
amd64 Complete Generic Linux kernel and headers
ii linux-headers-5.8.0-12 5.8.0-12.13
all Header files related to Linux kernel version 5.8.0
ii linux-headers-5.8.0-12-generic 5.8.0-12.13
amd64 Linux kernel headers for version 5.8.0 on 64 bit x86 SMP
ii linux-headers-generic 5.8.0.12.14
amd64 Generic Linux kernel headers
ii linux-image-5.8.0-12-generic 5.8.0-12.13
amd64 Signed kernel image generic
ii linux-image-generic 5.8.0.12.14
amd64 Generic Linux kernel image
ii linux-modules-5.8.0-12-generic 5.8.0-12.13
amd64 Linux kernel extra modules for version 5.8.0 on 64 bit x86 SMP
ii linux-modules-extra-5.8.0-12-generic 5.8.0-12.13
amd64 Linux kernel extra modules for version 5.8.0 on 64 bit x86 SMP
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/1891020
Title:
iptable_filter and ip6table_filter cannot be loaded with 5.8 kernel
Status in linux package in Ubuntu:
Incomplete
Bug description:
Ubuntu groovy
linux-modules-5.8.0-12-generic 5.8.0-12.13
# uname -r
5.8.0-12-generic
After reboot,
1) no IPv4 iptable kernel module are loaded:
# lsmod|grep iptable
#
2) all IPv4 iptable kernel modules are present:
# find /lib/modules/5.8.0-12-generic/kernel/net/ipv4/netfilter -name
"iptable_*"
/lib/modules/5.8.0-12-generic/kernel/net/ipv4/netfilter/iptable_filter.ko
/lib/modules/5.8.0-12-generic/kernel/net/ipv4/netfilter/iptable_nat.ko
/lib/modules/5.8.0-12-generic/kernel/net/ipv4/netfilter/iptable_mangle.ko
/lib/modules/5.8.0-12-generic/kernel/net/ipv4/netfilter/iptable_raw.ko
/lib/modules/5.8.0-12-generic/kernel/net/ipv4/netfilter/iptable_security.ko
3) No IPv4 iptable kernel modules can be loaded:
# for module in iptable_filter iptable_nat iptable_mangle; do modprobe
/lib/modules/5.8.0-12-generic/kernel/net/ipv4/netfilter/${module}.ko; done
modprobe: FATAL: Module
/lib/modules/5.8.0-12-generic/kernel/net/ipv4/netfilter/iptable_filter.ko not
found in directory /lib/modules/5.8.0-12-generic
modprobe: FATAL: Module
/lib/modules/5.8.0-12-generic/kernel/net/ipv4/netfilter/iptable_nat.ko not
found in directory /lib/modules/5.8.0-12-generic
modprobe: FATAL: Module
/lib/modules/5.8.0-12-generic/kernel/net/ipv4/netfilter/iptable_mangle.ko not
found in directory /lib/modules/5.8.0-12-generic
4) Same issue after re-creating the module dependency:
# depmod
# for module in iptable_filter iptable_nat iptable_mangle; do modprobe
/lib/modules/5.8.0-12-generic/kernel/net/ipv4/netfilter/${module}.ko; done
modprobe: FATAL: Module
/lib/modules/5.8.0-12-generic/kernel/net/ipv4/netfilter/iptable_filter.ko not
found in directory /lib/modules/5.8.0-12-generic
modprobe: FATAL: Module
/lib/modules/5.8.0-12-generic/kernel/net/ipv4/netfilter/iptable_nat.ko not
found in directory /lib/modules/5.8.0-12-generic
modprobe: FATAL: Module
/lib/modules/5.8.0-12-generic/kernel/net/ipv4/netfilter/iptable_mangle.ko not
found in directory /lib/modules/5.8.0-12-generic
No such issue with linux-modules-5.4.0-42-generic.
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