syzbot


WARNING: suspicious RCU usage in netem_enqueue
Status: fixed on 2019/10/15 23:40
Reported-by: syzbot+@syzkaller.appspotmail.com
Fix commit: 159d2c7d8106 net-backports: sch_netem: fix rcu splat in netem_enqueue()
First crash: 817d, last: 803d

Cause bisection: introduced by (bisect log) :
commit c667186f1c01ca8970c785888868b7ffd74e51ee
Author: Marc Zyngier <marc.zyngier@arm.com>
Date: Thu Apr 27 18:06:48 2017 +0000

  arm64: KVM: Fix decoding of Rt/Rt2 when trapping AArch32 CP accesses

Crash: WARNING in br_fdb_find (log)
Repro: C syz .config
similar bugs (2):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 WARNING: suspicious RCU usage in netem_enqueue C done 2 801d 806d 1/1 fixed on 2019/12/10 20:49
linux-4.14 WARNING: suspicious RCU usage in netem_enqueue C done 3 780d 803d 1/1 fixed on 2019/12/13 05:27

Sample crash report:

Crashes (16):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-selinux-root 2019/09/24 20:53 upstream 4c07e2ddab5b 0942eab8 .config log report syz C
ci-upstream-kasan-gce-root 2019/09/24 09:47 upstream e94f8ccde471 c68252d2 .config log report syz C
ci-upstream-kasan-gce-smack-root 2019/09/23 06:41 upstream 619e17cf75dd d96e88f3 .config log report syz C
ci-upstream-kasan-gce 2019/09/21 20:38 upstream 227c3e9eb5cf d96e88f3 .config log report syz C
ci-upstream-kasan-gce-root 2019/09/20 03:39 upstream 3c2edc36a774 4d3ae0b7 .config log report syz C
ci-upstream-kasan-gce-386 2019/09/21 00:53 upstream 574cc4539762 d96e88f3 .config log report syz C
ci-upstream-net-kasan-gce 2019/09/20 22:38 net-next b41dae061bbd d96e88f3 .config log report syz C
ci-upstream-net-kasan-gce 2019/09/18 08:09 net-next 1bab8d4c488b 03e0d245 .config log report syz C
ci-upstream-net-kasan-gce 2019/09/15 21:48 net-next a3d3c74da49c 32d59357 .config log report syz C
ci-upstream-linux-next-kasan-gce-root 2019/09/23 20:26 linux-next b5b3bd898ba9 1e9788a0 .config log report syz C
ci-upstream-net-this-kasan-gce 2019/09/20 01:04 net 280ceaed79f1 4d3ae0b7 .config log report
ci-upstream-net-kasan-gce 2019/09/27 15:58 net-next b41dae061bbd d8074e0b .config log report
ci-upstream-net-kasan-gce 2019/09/23 11:41 net-next b41dae061bbd d96e88f3 .config log report
ci-upstream-net-kasan-gce 2019/09/20 02:46 net-next b41dae061bbd 4d3ae0b7 .config log report
ci-upstream-net-kasan-gce 2019/09/15 20:27 net-next a3d3c74da49c 32d59357 .config log report
ci-upstream-net-kasan-gce 2019/09/13 16:52 net-next 022c10d6c73b 40fa42bc .config log report