syzbot


WARNING in cbq_destroy_class
Status: fixed on 2020/02/18 14:31
Reported-by: syzbot+0a0596220218fcb603a8@syzkaller.appspotmail.com
Fix commit: 2e24cd755552 net_sched: fix ops->bind_class() implementations
First crash: 683d, last: 660d

Cause bisection: introduced by (bisect log) :
commit d51aae68b142f48232257e96ce317db25445418d
Author: Jiri Pirko <jiri@mellanox.com>
Date: Mon Nov 27 17:37:21 2017 +0000

  net: sched: cbq: create block for q->link.block

Crash: WARNING in cbq_destroy_class (log)
Repro: C syz .config
similar bugs (2):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 WARNING in cbq_destroy_class C done 1 681d 681d 1/1 fixed on 2020/02/23 20:58
linux-4.14 WARNING in cbq_destroy_class C inconclusive 1 560d 680d 0/1 upstream: reported C repro on 2020/01/24 21:03
Patch testing requests:
Created Duration User Patch Repo Result
2020/01/24 01:04 19m xiyou.wangcong@gmail.com https://github.com/congwang/linux.git syzbot OK
2020/01/23 04:14 18m xiyou.wangcong@gmail.com https://github.com/congwang/linux.git syzbot OK

Sample crash report:

Crashes (7):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-selinux-root 2020/01/23 12:32 upstream dbab40bdb42c 3334d684 .config log report syz C
ci-upstream-kasan-gce-root 2020/01/23 09:33 upstream dbab40bdb42c 3334d684 .config log report syz C
ci-upstream-kasan-gce 2020/01/22 03:50 upstream d96d875ef5dd 8eda0b95 .config log report syz C
ci-upstream-kasan-gce-386 2020/01/21 22:41 upstream d96d875ef5dd 8eda0b95 .config log report syz C
ci-upstream-net-this-kasan-gce 2020/01/21 18:49 net 80892772c4ed 8eda0b95 .config log report syz C
ci-upstream-net-kasan-gce 2020/01/21 18:26 net-next 17e10a15a796 8eda0b95 .config log report syz C
ci-upstream-net-kasan-gce 2020/02/13 15:31 net-next fdfa3a6778b1 84f4fc8a .config log report