INFO: task hung in hashlimit_net_exit
Status: internal: reported syz repro on 2020/02/13 07:17
Fix commit: netfilter: xt_hashlimit: limit the max size of hashtable
Patched on: [ci-upstream-linux-next-kasan-gce-root], missing on: [ci-qemu-upstream ci-qemu-upstream-386 ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-leak ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-kmsan-gce ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-kcsan-gce ci2-upstream-usb]
First crash: 45d, last: 1d14h

Cause bisection: introduced by (bisect log):

commit 11d5f15723c9f39d7c131d0149d024c17dbef676
Author: Vishwanath Pai <>
Date: Thu Sep 22 16:43:44 2016 +0000

  netfilter: xt_hashlimit: Create revision 2 to support higher pps rates

Crash: INFO: task hung in synchronize_rcu (log)
Repro: syz .config

Sample crash report:

Crashes (46):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro Maintainers
ci-upstream-kasan-gce-smack-root 2020/02/13 07:11 upstream f2850dd5 84f4fc8a .config log report syz,,,,,,,,
ci-upstream-kasan-gce-selinux-root 2020/02/15 11:26 upstream 2019fc96 5d7b90f1 .config log report,,,,,,,,
ci-upstream-kasan-gce-smack-root 2020/02/13 12:36 upstream f2850dd5 84f4fc8a .config log report,,,,,,,,
ci-upstream-kasan-gce-smack-root 2020/02/12 01:17 upstream 0a679e13 4d1ab643 .config log report,,,,,,,,
ci-upstream-kasan-gce-root 2020/02/10 19:10 upstream bb6d3fb3 18847f55 .config log report,,,,,,,,
ci-upstream-kasan-gce 2020/02/05 04:27 upstream 33b40134 93e5e335 .config log report,,,,,,,,
ci-upstream-kasan-gce 2020/02/04 09:36 upstream 322bf2d3 93e5e335 .config log report,,,,,,,,
ci-upstream-kasan-gce 2020/02/04 09:17 upstream 322bf2d3 93e5e335 .config log report,,,,,,,,
ci-upstream-kasan-gce-smack-root 2020/02/03 13:04 upstream 46d6b7be 93e5e335 .config log report,,,,,,,,
ci-upstream-kasan-gce 2020/02/01 01:12 upstream ccaaaf6f c30117b2 .config log report,,,,,,,,
ci-upstream-kasan-gce-smack-root 2020/01/31 12:30 upstream 9f68e365 5ed23f9a .config log report,,,,,,,,
ci-upstream-kasan-gce-smack-root 2020/01/28 06:03 upstream d5226fa6 56cd6c9b .config log report,,,,,,,,
ci-upstream-kasan-gce-root 2020/01/24 16:59 upstream 4703d911 2e95ab33 .config log report,,,,,,,
ci-upstream-kasan-gce-smack-root 2020/01/22 10:38 upstream d96d875e 8eda0b95 .config log report,,,,,,,
ci-upstream-kasan-gce-selinux-root 2020/01/20 12:40 upstream def9d278 0342f8c7 .config log report,,,,,,,
ci-upstream-kasan-gce-smack-root 2020/01/20 12:36 upstream def9d278 0342f8c7 .config log report,,,,,,,
ci-upstream-kasan-gce-selinux-root 2020/01/18 19:14 upstream 25e73aad 3de7aabb .config log report,,,,,,,
ci-upstream-kasan-gce-root 2020/01/16 00:10 upstream 51d69817 f9b69507 .config log report,,,,,,,
ci-upstream-kasan-gce-root 2020/01/14 15:10 upstream b3a987b0 32881205 .config log report,,,,,,,
ci-upstream-kasan-gce-root 2020/01/13 17:56 upstream b3a987b0 99565c1a .config log report,,,,,,,
ci-upstream-kasan-gce-root 2020/01/11 20:47 upstream bef1d882 4c04afaa .config log report,,,,,,,
ci-upstream-kasan-gce 2020/01/09 07:24 upstream b07f636f ddc3e859 .config log report,,,,,,,
ci-upstream-kasan-gce 2020/01/03 06:02 upstream 7ca4ad5b 25a0186e .config log report,,,,,,,
ci-upstream-kasan-gce-386 2020/02/06 07:25 upstream 4c7d00cc 662cf49a .config log report,,,,,,,,
ci-upstream-kasan-gce-386 2020/01/28 03:25 upstream a5b871c9 56cd6c9b .config log report,,,,,,,,
ci-upstream-kasan-gce-386 2020/01/26 13:33 upstream 2821e26f f4e7270e .config log report,,,,,,,,
ci-upstream-net-this-kasan-gce 2020/02/15 07:11 net a1fa83bd 5d7b90f1 .config log report,,,,,,,,
ci-upstream-net-this-kasan-gce 2020/02/12 05:06 net f27f37a0 a75b198c .config log report,,,,,,,,
ci-upstream-net-this-kasan-gce 2020/02/11 08:07 net 00516d13 084454ae .config log report,,,,,,,,
ci-upstream-net-this-kasan-gce 2020/02/09 18:26 net fdfa3a67 6ece2ea5 .config log report,,,,,,,,
ci-upstream-net-this-kasan-gce 2020/02/04 18:16 net 83b43045 93e5e335 .config log report,,,,,,,,
ci-upstream-net-this-kasan-gce 2020/02/02 16:47 net b7c3a17c 93e5e335 .config log report,,,,,,,,
ci-upstream-net-this-kasan-gce 2020/01/16 07:37 net 8b792f84 f9b69507 .config log report,,,,,,,
ci-upstream-net-this-kasan-gce 2020/01/05 21:37 net b54ef37b d646e21f .config log report,,,,,,,
ci-upstream-net-kasan-gce 2020/02/15 18:43 net-next 2019fc96 5d7b90f1 .config log report,,,,,,,,
ci-upstream-net-kasan-gce 2020/02/12 11:50 net-next fdfa3a67 a75b198c .config log report,,,,,,,,
ci-upstream-net-kasan-gce 2020/02/09 13:51 net-next fdfa3a67 6ece2ea5 .config log report,,,,,,,,
ci-upstream-net-kasan-gce 2020/02/02 22:22 net-next 9f68e365 93e5e335 .config log report,,,,,,,,
ci-upstream-net-kasan-gce 2020/01/28 14:34 net-next 3127642d 56cd6c9b .config log report,,,,,,,,
ci-upstream-net-kasan-gce 2020/01/28 09:55 net-next 8e5aa617 56cd6c9b .config log report,,,,,,,,
ci-upstream-net-kasan-gce 2020/01/26 08:46 net-next 3333e50b f4e7270e .config log report,,,,,,,
ci-upstream-net-kasan-gce 2020/01/20 18:13 net-next b3f7e3f2 d2557fb5 .config log report,,,,,,,
ci-upstream-net-kasan-gce 2020/01/18 15:10 net-next 56f200c7 3de7aabb .config log report,,,,,,,
ci-upstream-net-kasan-gce 2020/01/16 00:08 net-next 4e2fa6b9 f9b69507 .config log report,,,,,,,
ci-upstream-net-kasan-gce 2020/01/13 01:37 net-next a442c2c3 53faa9fe .config log report,,,,,,,
ci-upstream-net-kasan-gce 2020/01/09 07:50 net-next 53ebeca2 ddc3e859 .config log report,,,,,,,