[ 218.5441972] panic: kernel diagnostic assertion "c->c_cpu->cc_lwp == curlwp || c->c_cpu->cc_active != c" failed: file "/syzkaller/managers/netbsd/kernel/sys/kern/kern_timeout.c", line 318 [ 218.5626237] cpu0: Begin traceback... [ 218.5667832] vpanic() at netbsd:vpanic+0x214 [ 218.5775973] _GLOBAL__sub_D_65535_0_cpu_configure() at netbsd:_GLOBAL__sub_D_65535_0_cpu_configure [ 218.5899008] callout_destroy() at netbsd:callout_destroy+0xcb [ 218.6009384] itimerfree() at netbsd:itimerfree+0x102 [ 218.6110018] timers_free() at netbsd:timers_free+0x2ef [ 218.6223086] exit1() at netbsd:exit1+0x28f [ 218.6332721] sys_exit() at netbsd:sys_exit+0x6c [ 218.6448689] syscall() at netbsd:syscall+0x32e [ 218.6555416] --- syscall (number 1) --- [ 218.6555416] 72847d0fe47a: [ 218.6670097] cpu0: End traceback... [ 218.6670097] dumping to dev 4,1 (offset=0, size=0): not possible [ 218.6670097] rebooting... SeaBIOS (version 1.8.2-20190122_225043-google) Total RAM Size = 0x00000001e0000000 = 7680 MiB CPUs found: 2 Max CPUs supported: 2 found virtio-scsi at 0:3 virtio-scsi vendor='Google' product='PersistentDisk' rev='1' type=0 removable=0 virtio-scsi blksize=512 sectors=4194304 = 2048 MiB drive 0x000f29c0: PCHS=0/0/0 translation=lba LCHS=520/128/63 s=4194304 Booting from Hard Disk 0... >> NetBSD/x86 BIOS Boot, Revision 5.10 (Tue Jul 17 14:59:51 UTC 2018) (from NetBSD 8.0) >> Memory: 639/3144640 k 1. Boot normally 2. Boot single user 3. Disable ACPI 4. Disable ACPI and SMP 5. Drop to boot prompt