Warning: Permanently added '10.128.0.190' (ECDSA) to the list of known hosts. 2020/06/06 03:09:40 fuzzer started 2020/06/06 03:09:41 dialing manager at 10.128.0.105:35423 2020/06/06 03:09:50 syscalls: 3055 2020/06/06 03:09:50 code coverage: enabled 2020/06/06 03:09:50 comparison tracing: enabled 2020/06/06 03:09:50 extra coverage: enabled 2020/06/06 03:09:50 setuid sandbox: enabled 2020/06/06 03:09:50 namespace sandbox: enabled 2020/06/06 03:09:50 Android sandbox: /sys/fs/selinux/policy does not exist 2020/06/06 03:09:50 fault injection: enabled 2020/06/06 03:09:50 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/06/06 03:09:50 net packet injection: enabled 2020/06/06 03:09:50 net device setup: enabled 2020/06/06 03:09:50 concurrency sanitizer: enabled 2020/06/06 03:09:50 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/06/06 03:09:50 USB emulation: enabled syzkaller login: [ 63.186467][ T8902] KCSAN: could not find function: '_find_next_bit' 2020/06/06 03:09:54 adding functions to KCSAN blacklist: 'echo_char' 'tick_nohz_idle_stop_tick' 'shmem_file_read_iter' 'do_nanosleep' '__ext4_new_inode' 'ep_poll' 'add_timer' 'do_signal_stop' 'generic_fillattr' 'pcpu_alloc' 'copy_process' '_find_next_bit' 'xas_clear_mark' 'blk_mq_dispatch_rq_list' 'find_get_pages_range_tag' 'blk_mq_request_bypass_insert' 'ext4_mb_good_group' 'ktime_get_real_seconds' 'file_update_time' 'blk_mq_sched_dispatch_requests' 'alloc_pid' '__send_signal' '__mark_inode_dirty' 'dd_has_work' 'mod_timer' 'ext4_free_inodes_count' 'do_syslog' 'vm_area_dup' 'run_timer_softirq' 'wbt_done' 'futex_wait_queue_me' 'generic_write_end' [ 158.881459][ T0] ================================================================== [ 158.889742][ T0] BUG: KCSAN: data-race in tick_nohz_next_event / tick_sched_do_timer [ 158.898103][ T0] [ 158.900436][ T0] write to 0xffffffff8764e210 of 4 bytes by interrupt on cpu 0: [ 158.908101][ T0] tick_sched_do_timer+0xb4/0xd0 [ 158.913176][ T0] tick_sched_timer+0x3f/0xd0 [ 158.917866][ T0] __hrtimer_run_queues+0x271/0x600 [ 158.923094][ T0] hrtimer_interrupt+0x226/0x490 [ 158.928042][ T0] smp_apic_timer_interrupt+0xd8/0x270 [ 158.933519][ T0] apic_timer_interrupt+0xf/0x20 [ 158.938496][ T0] __tsan_read8+0x91/0x110 [ 158.942920][ T0] _copy_to_iter+0x1fb/0x990 [ 158.947523][ T0] simple_copy_to_iter+0x56/0x80 [ 158.952465][ T0] __skb_datagram_iter+0x23f/0x470 [ 158.957576][ T0] skb_copy_datagram_iter+0x65/0x160 [ 158.962945][ T0] tcp_recvmsg+0x109e/0x1ba0 [ 158.967563][ T0] inet_recvmsg+0xc1/0x250 [ 158.972069][ T0] sock_recvmsg+0x8e/0xb0 [ 158.976411][ T0] sock_read_iter+0x185/0x230 [ 158.981097][ T0] new_sync_read+0x416/0x450 [ 158.985699][ T0] __vfs_read+0x9e/0xb0 [ 158.989878][ T0] vfs_read+0x13e/0x2b0 [ 158.994141][ T0] ksys_read+0x16a/0x1a0 [ 158.998607][ T0] __x64_sys_read+0x49/0x60 [ 159.003097][ T0] do_syscall_64+0xc7/0x3b0 [ 159.007675][ T0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 159.013781][ T0] [ 159.016145][ T0] read to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 1: [ 159.023742][ T0] tick_nohz_next_event+0x181/0x340 [ 159.028966][ T0] tick_nohz_idle_stop_tick+0x3b9/0x680 [ 159.034765][ T0] do_idle+0x1ad/0x290 [ 159.038854][ T0] cpu_startup_entry+0x14/0x20 [ 159.043618][ T0] start_secondary+0x169/0x1b0 [ 159.048461][ T0] secondary_startup_64+0xa4/0xb0 [ 159.053460][ T0] [ 159.055863][ T0] Reported by Kernel Concurrency Sanitizer on: [ 159.062184][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0 [ 159.070880][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 159.081541][ T0] ================================================================== [ 159.089602][ T0] Kernel panic - not syncing: panic_on_warn set ... [ 159.096288][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0 [ 159.104196][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 159.114331][ T0] Call Trace: [ 159.117758][ T0] dump_stack+0x11d/0x187 [ 159.122185][ T0] panic+0x210/0x640 [ 159.126419][ T0] ? vprintk_func+0x89/0x13a [ 159.131218][ T0] kcsan_report.cold+0xc/0x1a [ 159.136040][ T0] kcsan_setup_watchpoint+0x3fb/0x440 [ 159.141614][ T0] tick_nohz_next_event+0x181/0x340 [ 159.147009][ T0] tick_nohz_idle_stop_tick+0x3b9/0x680 [ 159.153103][ T0] ? ktime_get+0x1c9/0x210 [ 159.157646][ T0] ? debug_smp_processor_id+0x3f/0x129 [ 159.163164][ T0] do_idle+0x1ad/0x290 [ 159.167267][ T0] ? debug_smp_processor_id+0x3a/0x129 [ 159.173196][ T0] cpu_startup_entry+0x14/0x20 [ 159.178025][ T0] start_secondary+0x169/0x1b0 [ 159.182969][ T0] secondary_startup_64+0xa4/0xb0 [ 159.189745][ T0] Kernel Offset: disabled [ 159.194202][ T0] Rebooting in 86400 seconds..