BUG: soft lockup in kvm_vm_ioctl
Status: upstream: reported syz repro on 2019/05/01 14:36
First crash: 998d, last: 886d

Cause bisection: introduced by (bisect log) :
commit 252153ba518ac0bcde6b7152c63380d4415bfe5d
Author: Eric Biggers <>
Date: Wed Nov 29 20:43:17 2017 +0000

  ubifs: switch to fscrypt_prepare_setattr()

Crash: INFO: rcu detected stall in corrupted (log)
Repro: syz .config

Fix bisection: fixed by (bisect log) :
commit 8b515be512a2435bb8aedc6390cbe140167f9eb9
Author: Farhan Ali <>
Date: Thu Jul 11 14:28:52 2019 +0000

  vfio-ccw: Fix memory leak and don't call cp_free in cp_init

Sample crash report:

Crashes (2):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce 2019/04/27 13:30 upstream baf76f0c58ae b617407b .config log report syz
ci-upstream-kasan-gce 2019/08/17 11:28 upstream 6e625a1a3f47 8fd428a1 .config log report