Warning: Permanently added '10.128.0.123' (ECDSA) to the list of known hosts.
2020/06/27 17:55:11 fuzzer started
2020/06/27 17:55:11 dialing manager at 10.128.0.105:34097
2020/06/27 17:55:11 syscalls: 3105
2020/06/27 17:55:11 code coverage: enabled
2020/06/27 17:55:11 comparison tracing: enabled
2020/06/27 17:55:11 extra coverage: enabled
2020/06/27 17:55:11 setuid sandbox: enabled
2020/06/27 17:55:11 namespace sandbox: enabled
2020/06/27 17:55:11 Android sandbox: /sys/fs/selinux/policy does not exist
2020/06/27 17:55:11 fault injection: enabled
2020/06/27 17:55:11 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/06/27 17:55:11 net packet injection: enabled
2020/06/27 17:55:11 net device setup: enabled
2020/06/27 17:55:11 concurrency sanitizer: enabled
2020/06/27 17:55:11 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/06/27 17:55:11 USB emulation: enabled
2020/06/27 17:55:12 suppressing KCSAN reports in functions: 'alloc_pid' '__ext4_new_inode' 'shmem_unlink' 'filemap_map_pages' 'do_epoll_wait' 'futex_wait_queue_me' 'blk_mq_dispatch_rq_list' 'do_signal_stop' 'ext4_free_inodes_count' 'n_tty_receive_buf_common' 
17:55:18 executing program 0:
pipe(&(0x7f0000000040)={<r0=>0xffffffffffffffff, <r1=>0xffffffffffffffff})
r2 = socket$nl_route(0x10, 0x3, 0x0)
perf_event_open(&(0x7f0000000000)={0x0, 0x70, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @perf_config_ext={0x7}}, 0x0, 0x0, 0xffffffffffffffff, 0x0)
splice(r0, 0x0, r2, 0x0, 0x1420000a77, 0x0)
sendmsg$nl_route(0xffffffffffffffff, &(0x7f0000000100)={0x0, 0x0, &(0x7f0000000200)={&(0x7f0000000000)=ANY=[@ANYBLOB="4800000010001fff000005fbffffff0000000000", @ANYRES32, @ANYBLOB="0000000001000000280012800a00010076786c616e00000018000280140003"], 0x3}}, 0x0)
write$binfmt_elf64(r1, &(0x7f0000000000)=ANY=[], 0xfffffd88)

syzkaller login: [   37.728449][ T8642] IPVS: ftp: loaded support on port[0] = 21
[   37.804922][ T8642] chnl_net:caif_netlink_parms(): no params data found
[   37.825968][    T2] ==================================================================
[   37.834056][    T2] BUG: KCSAN: data-race in copy_process / release_task
[   37.840866][    T2] 
[   37.843167][    T2] write to 0xffffffff89281410 of 4 bytes by task 8753 on cpu 0:
[   37.850767][    T2]  release_task+0x6c8/0xb90
[   37.855259][    T2]  do_exit+0x1140/0x16e0
[   37.859482][    T2]  call_usermodehelper_exec_async+0x2da/0x2e0
[   37.865528][    T2]  ret_from_fork+0x1f/0x30
[   37.869906][    T2] 
[   37.872214][    T2] read to 0xffffffff89281410 of 4 bytes by task 2 on cpu 1:
[   37.879463][    T2]  copy_process+0xab5/0x32b0
[   37.884025][    T2]  _do_fork+0xf1/0x660
[   37.888059][    T2]  kernel_thread+0x85/0xb0
[   37.892453][    T2]  kthreadd+0x317/0x3d0
[   37.896596][    T2]  ret_from_fork+0x1f/0x30
[   37.900984][    T2] 
[   37.903290][    T2] Reported by Kernel Concurrency Sanitizer on:
[   37.909412][    T2] CPU: 1 PID: 2 Comm: kthreadd Not tainted 5.8.0-rc2-syzkaller #0
[   37.917190][    T2] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   37.927213][    T2] ==================================================================
[   37.935268][    T2] Kernel panic - not syncing: panic_on_warn set ...
[   37.941833][    T2] CPU: 1 PID: 2 Comm: kthreadd Not tainted 5.8.0-rc2-syzkaller #0
[   37.949600][    T2] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   37.959624][    T2] Call Trace:
[   37.962885][    T2]  dump_stack+0x10f/0x19d
[   37.967181][    T2]  panic+0x1f8/0x63a
[   37.971045][    T2]  ? vprintk_emit+0x44a/0x4f0
[   37.975696][    T2]  kcsan_report+0x684/0x690
[   37.980169][    T2]  ? kcsan_setup_watchpoint+0x453/0x4d0
[   37.985691][    T2]  ? copy_process+0xab5/0x32b0
[   37.990431][    T2]  ? _do_fork+0xf1/0x660
[   37.994647][    T2]  ? kernel_thread+0x85/0xb0
[   37.999214][    T2]  ? kthreadd+0x317/0x3d0
[   38.003525][    T2]  ? ret_from_fork+0x1f/0x30
[   38.008105][    T2]  ? debug_smp_processor_id+0x18/0x20
[   38.013446][    T2]  ? sysvec_hyperv_callback+0x90/0x140
[   38.018887][    T2]  ? copy_creds+0x280/0x350
[   38.023380][    T2]  ? copy_creds+0x280/0x350
[   38.027879][    T2]  kcsan_setup_watchpoint+0x453/0x4d0
[   38.033243][    T2]  ? copy_creds+0x280/0x350
[   38.037738][    T2]  copy_process+0xab5/0x32b0
[   38.042334][    T2]  ? check_preemption_disabled+0x3f/0x1a0
[   38.048068][    T2]  ? constant_test_bit+0x30/0x30
[   38.052995][    T2]  _do_fork+0xf1/0x660
[   38.057056][    T2]  ? psi_group_change+0x1bd/0x280
[   38.062071][    T2]  ? check_preemption_disabled+0x3f/0x1a0
[   38.067778][    T2]  ? constant_test_bit+0x30/0x30
[   38.072701][    T2]  kernel_thread+0x85/0xb0
[   38.077106][    T2]  ? constant_test_bit+0x30/0x30
[   38.082035][    T2]  kthreadd+0x317/0x3d0
[   38.086176][    T2]  ? kthread_stop+0x310/0x310
[   38.090869][    T2]  ret_from_fork+0x1f/0x30
[   38.096256][    T2] Kernel Offset: disabled
[   38.100575][    T2] Rebooting in 86400 seconds..