Warning: Permanently added '10.128.1.8' (ECDSA) to the list of known hosts. 2020/01/31 18:48:02 fuzzer started 2020/01/31 18:48:05 dialing manager at 10.128.0.105:34981 2020/01/31 18:48:05 checking machine... 2020/01/31 18:48:05 checking revisions... 2020/01/31 18:48:05 testing simple program... syzkaller login: [ 71.918287][ T7928] IPVS: ftp: loaded support on port[0] = 21 2020/01/31 18:48:05 building call list... [ 72.263028][ T602] tipc: TX() has been purged, node left! [ 72.633318][ T3037] ================================================================== [ 72.641577][ T3037] BUG: KCSAN: data-race in find_next_bit / rcu_report_exp_cpu_mult [ 72.649464][ T3037] [ 72.651797][ T3037] write to 0xffffffff85c7d080 of 8 bytes by interrupt on cpu 0: [ 72.659440][ T3037] rcu_report_exp_cpu_mult+0x4f/0xa0 [ 72.664731][ T3037] rcu_report_exp_rdp+0x6c/0x90 [ 72.669603][ T3037] rcu_exp_handler+0xe5/0x190 [ 72.674475][ T3037] flush_smp_call_function_queue+0x18c/0x2b0 [ 72.680476][ T3037] generic_smp_call_function_single_interrupt+0x1c/0x49 [ 72.687425][ T3037] smp_call_function_single_interrupt+0x3f/0x100 [ 72.693753][ T3037] call_function_single_interrupt+0xf/0x20 [ 72.699573][ T3037] __tsan_unaligned_write1+0x30/0x100 [ 72.705127][ T3037] number+0x58c/0x7b0 [ 72.709134][ T3037] pointer+0x2fa/0x4e0 [ 72.713216][ T3037] vsnprintf+0x342/0xb40 [ 72.717553][ T3037] seq_vprintf+0xaa/0xf0 [ 72.721821][ T3037] seq_printf+0x6c/0x90 [ 72.726018][ T3037] s_show+0x189/0x1b0 [ 72.730023][ T3037] seq_read+0x7bb/0x9d0 [ 72.734178][ T3037] proc_reg_read+0xe9/0x140 [ 72.738705][ T3037] __vfs_read+0x67/0xc0 [ 72.742879][ T3037] vfs_read+0x143/0x2c0 [ 72.747056][ T3037] ksys_read+0xd5/0x1b0 [ 72.751240][ T3037] __x64_sys_read+0x4c/0x60 [ 72.755768][ T3037] do_syscall_64+0xcc/0x3a0 [ 72.760295][ T3037] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 72.766173][ T3037] [ 72.768511][ T3037] read to 0xffffffff85c7d080 of 8 bytes by task 3037 on cpu 1: [ 72.776064][ T3037] find_next_bit+0x57/0xe0 [ 72.780497][ T3037] sync_rcu_exp_select_node_cpus+0x28e/0x510 [ 72.786660][ T3037] sync_rcu_exp_select_cpus+0x30c/0x590 [ 72.792213][ T3037] wait_rcu_exp_gp+0x25/0x40 [ 72.796819][ T3037] process_one_work+0x3d4/0x890 [ 72.801694][ T3037] worker_thread+0xa0/0x800 [ 72.806208][ T3037] kthread+0x1d4/0x200 [ 72.810303][ T3037] ret_from_fork+0x1f/0x30 [ 72.814711][ T3037] [ 72.817034][ T3037] Reported by Kernel Concurrency Sanitizer on: [ 72.823189][ T3037] CPU: 1 PID: 3037 Comm: kworker/1:2 Not tainted 5.5.0-rc1-syzkaller #0 [ 72.831518][ T3037] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 72.841622][ T3037] Workqueue: rcu_gp wait_rcu_exp_gp [ 72.846827][ T3037] ================================================================== [ 72.854913][ T3037] Kernel panic - not syncing: panic_on_warn set ... [ 72.861524][ T3037] CPU: 1 PID: 3037 Comm: kworker/1:2 Not tainted 5.5.0-rc1-syzkaller #0 [ 72.869857][ T3037] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 72.879933][ T3037] Workqueue: rcu_gp wait_rcu_exp_gp [ 72.885274][ T3037] Call Trace: [ 72.888573][ T3037] dump_stack+0x11d/0x181 [ 72.892918][ T3037] panic+0x210/0x640 [ 72.896841][ T3037] ? vprintk_func+0x8d/0x140 [ 72.901461][ T3037] kcsan_report.cold+0xc/0xd [ 72.906073][ T3037] kcsan_setup_watchpoint+0x3fe/0x460 [ 72.911461][ T3037] __tsan_read8+0xc6/0x100 [ 72.915889][ T3037] find_next_bit+0x57/0xe0 [ 72.920424][ T3037] sync_rcu_exp_select_node_cpus+0x28e/0x510 [ 72.926523][ T3037] sync_rcu_exp_select_cpus+0x30c/0x590 [ 72.932087][ T3037] wait_rcu_exp_gp+0x25/0x40 [ 72.936691][ T3037] process_one_work+0x3d4/0x890 [ 72.941578][ T3037] worker_thread+0xa0/0x800 [ 72.946122][ T3037] kthread+0x1d4/0x200 [ 72.950437][ T3037] ? rescuer_thread+0x6a0/0x6a0 [ 72.955846][ T3037] ? kthread_unpark+0xe0/0xe0 [ 72.960543][ T3037] ret_from_fork+0x1f/0x30 [ 72.966798][ T3037] Kernel Offset: disabled [ 72.971136][ T3037] Rebooting in 86400 seconds..