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Date:   Fri, 16 Nov 2018 14:55:14 +0530
From:   Naresh Kamboju <naresh.kamboju@...aro.org>
To:     netdev@...r.kernel.org
Cc:     pabeni@...hat.com, "David S. Miller" <davem@...emloft.net>,
        Willem de Bruijn <willemb@...gle.com>,
        Anders Roxell <anders.roxell@...aro.org>,
        Rafael Tinoco <rafael.tinoco@...aro.org>
Subject: selftests: net: udpgro.sh hangs on DUT devices running Linux -next

Kernel selftests: net: udpgro.sh hangs / waits forever on x86_64 and
arm32 devices running Linux -next. Test getting PASS on arm64 devices.

Do you see this problem ?

Short error log:
---------------------
ip6tables v1.6.1: can't initialize ip6tables table `nat': Table does
not exist (do you need to insmod?)

Short log error with debug,
------------------------------------
+ ip netns exec ns-peer-pwnOKK ip6tables -t nat -I PREROUTING -d
2001:db8::1 -j DNAT --to-destination 2001:db8::3
ip6tables v1.6.1: can't initialize ip6tables table `nat': Table does
not exist (do you need to insmod?)
Perhaps ip6tables or your kernel needs to be upgraded.
+ pid=3880
+ ip netns exec ns-peer-pwnOKK ./udpgso_bench_rx -G -b 2001:db8::1 -n 0
+ sleep 0.1
+ ip netns exec ns-peer-pwnOKK ./udpgso_bench_rx -b 2001:db8::3 -r -n 10 -l 1452
+ ./udpgso_bench_tx -l 4 -6 -D 2001:db8::1 -M 1 -s 14520 -S 0
+ kill -INT 3880
++ jobs -p
+ wait 3880 3881
# Here it is waiting forever.

Long test log,
selftests: net: udpgro.sh
[ 1009.614607] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready
[ 1009.737943] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
ipv4
[ 1010.053106] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready
[ 1010.162944] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
 no GRO                                  ok
 no GRO chk cmsg                         ./udpgso_bench_rx: wrong
packet number! got 7, expected 10

[ 1010.562502] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready
[ 1010.689950] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
failed
[ 1011.066820] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready
[ 1011.188955] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
 GRO                                     ok
[ 1011.550350] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready
[ 1011.673963] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
 GRO chk cmsg                            ok
[ 1012.117313] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready
[ 1012.242831] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
 GRO with custom segment size            ok
[ 1012.621189] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready
[ 1012.738940] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
[ 1012.896143] kauditd_printk_skb: 22 callbacks suppressed
[ 1012.896143] audit: type=1325 audit(1542288720.207:2489): table=nat
family=2 entries=0
[ 1012.909742] audit: type=1300 audit(1542288720.207:2489):
arch=c000003e syscall=313 success=yes exit=0 a0=2 a1=418424 a2=0 a3=2
items=0 ppid=7763 pid=21917 auid=4294967295 uid=0 gid=0 euid=0 suid=0
fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295
comm=\"modprobe\" exe=\"/bin/kmod\" subj=kernel key=(null)
[ 1012.936822] audit: type=1327 audit(1542288720.207:2489):
proctitle=2F7362696E2F6D6F6470726F6265002D71002D2D0069707461626C655F6E6174
[ 1012.948653] audit: type=1325 audit(1542288720.175:2490): table=nat
family=2 entries=0
[ 1012.956524] audit: type=1300 audit(1542288720.175:2490):
arch=c000003e syscall=55 success=yes exit=0 a0=4 a1=0 a2=40
a3=7ffeb4e82700 items=0 ppid=21878 pid=21916 auid=4294967295 uid=0
gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=ttyS0
ses=4294967295 comm=\"iptables\" exe=\"/usr/sbin/xtables-multi\"
subj=kernel key=(null)
[ 1012.985334] audit: type=1327 audit(1542288720.175:2490):
proctitle=69707461626C6573002D74006E6174002D4900505245524F5554494E47002D64003139322E3136382E312E31002D6A00444E4154002D2D746F2D64657374696E6174696F6E003139322E3136382E312E33
[ 1013.005799] audit: type=1325 audit(1542288720.221:2491): table=nat
family=2 entries=5
[ 1013.013652] audit: type=1300 audit(1542288720.221:2491):
arch=c000003e syscall=54 success=yes exit=0 a0=4 a1=0 a2=40 a3=b8a870
items=0 ppid=21878 pid=21916 auid=4294967295 uid=0 gid=0 euid=0 suid=0
fsuid=0 egid=0 sgid=0 fsgid=0 tty=ttyS0 ses=4294967295
comm=\"iptables\" exe=\"/usr/sbin/xtables-multi\" subj=kernel
key=(null)
[ 1013.042023] audit: type=1327 audit(1542288720.221:2491):
proctitle=69707461626C6573002D74006E6174002D4900505245524F5554494E47002D64003139322E3136382E312E31002D6A00444E4154002D2D746F2D64657374696E6174696F6E003139322E3136382E312E33
 GRO with custom segment size cmsg       ok
 bad GRO lookup                          ok
[ 1013.331549] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready
[ 1013.455957] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
ipv6
 no GRO                                  ./udpgso_bench_rx: wrong
packet number! got 7, expected 10

[ 1013.836277] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready
[ 1013.952959] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
failed
[ 1014.338978] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready
[ 1014.462967] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
 no GRO chk cmsg                         ok
[ 1014.839919] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready
[ 1014.965962] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
 GRO                                     ok
[ 1015.334213] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready
[ 1015.457938] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
 GRO chk cmsg                            ok
[ 1015.823508] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready
[ 1015.935954] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
 GRO with custom segment size            ok
[ 1016.332459] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready
[ 1016.453954] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
 GRO with custom segment size cmsg       ok
 bad GRO lookup                          ip6tables v1.6.1: can't
initialize ip6tables table `nat': Table does not exist (do you need to
insmod?)

Best regards
Naresh Kamboju

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