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https://bugs.launchpad.net/bugs/1891020
Title:
No IPv4 iptable kernel module can be loaded
Status in linux package in Ubuntu:
Confirmed
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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