syzbot


INFO: rcu detected stall in hash_ip4_gc
Status: fixed on 2020/04/15 17:19
Reported-by: syzbot+68a806795ac89df3aa1c@syzkaller.appspotmail.com
Fix commit: f66ee0410b1c netfilter: ipset: Fix "INFO: rcu detected stall in hash_xxx" reports
First crash: 683d, last: 683d

Cause bisection: introduced by (bisect log) :
commit 23c42a403a9cfdbad6004a556c927be7dd61a8ee
Author: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Date: Sat Oct 27 13:07:40 2018 +0000

  netfilter: ipset: Introduction of new commands and protocol version 7

Crash: INFO: task hung in nfnetlink_rcv_msg (log)
Repro: C syz .config
Patch testing requests:
Created Duration User Patch Repo Result
2020/02/17 20:32 19m kadlec@netfilter.org git://blackhole.kfki.hu/nf master OK
2020/02/17 14:58 19m kadlec@netfilter.org git://blackhole.kfki.hu/nf master OK
2020/02/17 14:18 11m kadlec@netfilter.org git://blackhole.kfki.hu/nf master report log
2020/02/17 13:55 12m kadlec@netfilter.org git://blackhole.kfki.hu/nf master report log
2020/02/14 21:58 14m kadlec@netfilter.org git://blackhole.kfki.hu/nf master report log
2020/02/13 18:50 14m kadlec@netfilter.org git://blackhole.kfki.hu/nf master report log
2020/02/13 13:12 13m kadlec@netfilter.org git://blackhole.kfki.hu/nf master report log
2020/02/11 22:21 14m kadlec@netfilter.org git://blackhole.kfki.hu/nf master report log
2020/01/27 19:21 13m kadlec@blackhole.kfki.hu git://blackhole.kfki.hu/nf master report log

Sample crash report:

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-386 2020/01/25 07:27 upstream 6381b442836e 2e95ab33 .config log report syz C