Package: iproute2 Version: 5.10.0-4 Severity: normal Dear Maintainer,
I just upgraded a host from Buster to testing. After reboot my locally configured policy routing failed to work. How to reproduce: root@example:~# echo 120 foo >>/etc/iproute2/rt_tables root@example:~# ip route show table foo Error: ipv4: FIB table does not exist. Dump terminated root@example:~# ip route show table 120 Error: ipv4: FIB table does not exist. Dump terminated Previously (with Buster) the above commands would output the (empty) table. After adding a route to the table, it becomes accessible: root@example:~# ip route add 1.2.3.4/32 via 127.0.0.1 table foo root@example:~# ip route show table foo 1.2.3.4 via 127.0.0.1 dev lo I am able to work around this problem by downgrading either the Linux kernel or the iproute2 package to 4.19 (Buster). I experimented a bit with different combinations of various versions of the Linux kernel and the iproute2 package (thanks to snapshots.d.o): Linux 4.9.0-9-amd64 + iproute2 5.10.0-4 -> OK Linux 4.19.0-17-amd64 + iproute2 5.10.0-4 -> OK Linux 5.3.0-3-amd64 + iproute2 5.10.0-4 -> FAIL Linux 5.4.0-3-amd64 + iproute2 5.10.0-4 -> FAIL Linux 5.10.0-7-amd64 + iproute2 4.20.0-2+deb10u1 -> OK Linux 5.10.0-7-amd64 + iproute2 5.x -> FAIL Thus the problem seems to have been introduced at the beginning of the Linux 5.x series. The problem is discussed here: https://www.spinics.net/lists/netdev/msg559739.html Relevant contributions in this thread seem to be: https://www.spinics.net/lists/netdev/msg559925.html https://www.spinics.net/lists/netdev/msg559906.html Summary: "ip route show table SOMETHING" is failing now, if the table "SOMETHING" does not contain any routes. Previously it exited with success (and empty output). I can imagine, that this changed behaviour could break some scripts related to policy routing. At least for me it caused problems with my tinc setup. Thank your for maintaining this package! Cheers, Lars -- System Information: Debian Release: 11.0 APT prefers unstable APT policy: (500, 'unstable'), (1, 'experimental') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 5.10.0-8-amd64 (SMP w/4 CPU threads) Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8), LANGUAGE not set Shell: /bin/sh linked to /bin/dash Init: sysvinit (via /sbin/init) LSM: AppArmor: enabled Versions of packages iproute2 depends on: ii debconf [debconf-2.0] 1.5.77 ii libbpf0 1:0.3-2 ii libbsd0 0.11.3-1 ii libc6 2.31-12 ii libcap2 1:2.44-1 ii libcap2-bin 1:2.44-1 ii libdb5.3 5.3.28+dfsg1-0.8 ii libelf1 0.183-3 ii libmnl0 1.0.4-3 ii libselinux1 3.1-3 ii libxtables12 1.8.7-1 Versions of packages iproute2 recommends: ii libatm1 1:2.5.1-4 Versions of packages iproute2 suggests: pn iproute2-doc <none> -- Configuration Files: /etc/iproute2/rt_tables changed [not included] -- debconf information excluded
