Warning: Permanently added '10.128.0.68' (ECDSA) to the list of known hosts. 2020/06/10 04:06:49 fuzzer started 2020/06/10 04:06:49 dialing manager at 10.128.0.105:35015 2020/06/10 04:06:49 syscalls: 3072 2020/06/10 04:06:49 code coverage: enabled 2020/06/10 04:06:49 comparison tracing: enabled 2020/06/10 04:06:49 extra coverage: enabled 2020/06/10 04:06:49 setuid sandbox: enabled 2020/06/10 04:06:49 namespace sandbox: enabled 2020/06/10 04:06:49 Android sandbox: /sys/fs/selinux/policy does not exist 2020/06/10 04:06:49 fault injection: enabled 2020/06/10 04:06:49 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/06/10 04:06:49 net packet injection: enabled 2020/06/10 04:06:49 net device setup: enabled 2020/06/10 04:06:49 concurrency sanitizer: enabled 2020/06/10 04:06:49 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/06/10 04:06:49 USB emulation: enabled syzkaller login: [ 54.247989][ T8924] KCSAN: could not find function: '_find_next_bit' 2020/06/10 04:06:53 adding functions to KCSAN blacklist: 'echo_char' 'ktime_get_real_seconds' 'copy_process' 'mod_timer' '__mark_inode_dirty' 'ext4_free_inodes_count' 'ep_poll' 'tick_nohz_idle_stop_tick' 'find_get_pages_range_tag' 'tick_nohz_next_event' 'iput' 'generic_fillattr' 'ext4_mark_iloc_dirty' '__ext4_new_inode' 'blk_mq_get_request' 'complete_signal' 'ext4_writepages' '__send_signal' 'pcpu_alloc' 'futex_wait_queue_me' 'generic_write_end' 'file_update_time' 'lookup_fast' 'add_timer' 'xas_find_marked' '_find_next_bit' 'run_timer_softirq' '__snd_rawmidi_transmit_ack' 'page_counter_charge' 'do_signal_stop' 'do_nanosleep' 'xas_clear_mark' 'blk_mq_dispatch_rq_list' 'n_tty_receive_buf_common' [ 80.537395][ C0] ================================================================== [ 80.545648][ C0] BUG: KCSAN: data-race in tick_sched_do_timer / tick_sched_do_timer [ 80.553696][ C0] [ 80.556047][ C0] write to 0xffffffff8764e210 of 4 bytes by interrupt on cpu 1: [ 80.563987][ C0] tick_sched_do_timer+0xb4/0xd0 [ 80.568906][ C0] tick_sched_timer+0x3f/0xd0 [ 80.573563][ C0] __hrtimer_run_queues+0x271/0x600 [ 80.578734][ C0] hrtimer_interrupt+0x226/0x490 [ 80.583648][ C0] smp_apic_timer_interrupt+0xd8/0x270 [ 80.589099][ C0] apic_timer_interrupt+0xf/0x20 [ 80.594009][ C0] policy_node+0x2/0xd0 [ 80.598136][ C0] alloc_pages_current+0xbb/0x170 [ 80.603195][ C0] skb_page_frag_refill+0x176/0x2d0 [ 80.608486][ C0] try_fill_recv+0x523/0xe60 [ 80.613202][ C0] virtnet_poll+0x62d/0x790 [ 80.617715][ C0] net_rx_action+0x3ad/0xac0 [ 80.622913][ C0] __do_softirq+0x118/0x34a [ 80.627400][ C0] run_ksoftirqd+0x41/0x60 [ 80.631796][ C0] smpboot_thread_fn+0x374/0x4a0 [ 80.636723][ C0] kthread+0x203/0x230 [ 80.640779][ C0] ret_from_fork+0x1f/0x30 [ 80.648056][ C0] [ 80.650366][ C0] read to 0xffffffff8764e210 of 4 bytes by interrupt on cpu 0: [ 80.657910][ C0] tick_sched_do_timer+0x2e/0xd0 [ 80.662831][ C0] tick_sched_timer+0x3f/0xd0 [ 80.667494][ C0] __hrtimer_run_queues+0x271/0x600 [ 80.672674][ C0] hrtimer_interrupt+0x226/0x490 [ 80.677589][ C0] smp_apic_timer_interrupt+0xd8/0x270 [ 80.683022][ C0] apic_timer_interrupt+0xf/0x20 [ 80.688022][ C0] [ 80.690333][ C0] Reported by Kernel Concurrency Sanitizer on: [ 80.696461][ C0] CPU: 0 PID: 8912 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 80.704667][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 80.714781][ C0] ================================================================== [ 80.722813][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 80.729385][ C0] CPU: 0 PID: 8912 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 80.738719][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 80.748763][ C0] Call Trace: [ 80.752031][ C0] [ 80.754866][ C0] dump_stack+0x11d/0x187 [ 80.759173][ C0] panic+0x210/0x640 [ 80.763056][ C0] ? vprintk_func+0x89/0x13a [ 80.767623][ C0] kcsan_report.cold+0xc/0x1a [ 80.772297][ C0] kcsan_setup_watchpoint+0x3fb/0x440 [ 80.777646][ C0] tick_sched_do_timer+0x2e/0xd0 [ 80.782570][ C0] tick_sched_timer+0x3f/0xd0 [ 80.787234][ C0] __hrtimer_run_queues+0x271/0x600 [ 80.792407][ C0] ? tick_sched_do_timer+0xd0/0xd0 [ 80.797495][ C0] hrtimer_interrupt+0x226/0x490 [ 80.802418][ C0] ? kvm_clock_read+0x14/0x30 [ 80.807089][ C0] smp_apic_timer_interrupt+0xd8/0x270 [ 80.813492][ C0] apic_timer_interrupt+0xf/0x20 [ 80.818399][ C0] [ 80.821319][ C0] RIP: 0033:0x6674ea [ 80.825193][ C0] Code: 00 00 49 8d 48 fe 48 d1 e9 48 89 4c 24 60 48 83 f9 40 4d 19 c9 49 83 e0 01 49 d3 e0 4d 21 c8 4c 89 44 24 40 48 39 4e 20 73 62 <48> 89 34 24 e8 9d 0d 00 00 48 8b 44 24 10 48 8b 4c 24 08 48 85 c9 [ 80.845206][ C0] RSP: 002b:000000c0001dfae8 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff13 [ 80.854034][ C0] RAX: 0000000000000000 RBX: 0000000000000004 RCX: 000000000000000a [ 80.862125][ C0] RDX: 0000000000000016 RSI: 000000c000346000 RDI: 0000000000000009 [ 80.870085][ C0] RBP: 000000c0001dfb60 R08: 0000000000000000 R09: ffffffffffffffff [ 80.878046][ C0] R10: 0000000000007a37 R11: 0000000000007d3d R12: 0000000000007d39 [ 80.886002][ C0] R13: 0000000000000100 R14: 0000000000000004 R15: 0000000000000004 [ 80.895251][ C0] Kernel Offset: disabled [ 80.900969][ C0] Rebooting in 86400 seconds..