[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.59' (ECDSA) to the list of known hosts. 2020/05/23 01:39:45 fuzzer started 2020/05/23 01:39:45 dialing manager at 10.128.0.105:38353 2020/05/23 01:39:45 syscalls: 3055 2020/05/23 01:39:45 code coverage: enabled 2020/05/23 01:39:45 comparison tracing: enabled 2020/05/23 01:39:45 extra coverage: enabled 2020/05/23 01:39:45 setuid sandbox: enabled 2020/05/23 01:39:45 namespace sandbox: enabled 2020/05/23 01:39:45 Android sandbox: /sys/fs/selinux/policy does not exist 2020/05/23 01:39:45 fault injection: enabled 2020/05/23 01:39:45 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/05/23 01:39:45 net packet injection: enabled 2020/05/23 01:39:45 net device setup: enabled 2020/05/23 01:39:45 concurrency sanitizer: enabled 2020/05/23 01:39:45 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/05/23 01:39:45 USB emulation: enabled syzkaller login: [ 54.851981][ T8933] KCSAN: could not find function: 'poll_schedule_timeout' [ 56.091226][ T8933] KCSAN: could not find function: '_find_next_bit' 2020/05/23 01:39:51 adding functions to KCSAN blacklist: 'ep_poll' 'ext4_free_inodes_count' 'pcpu_alloc' 'tick_nohz_idle_stop_tick' '__process_echoes' 'lruvec_lru_size' 'wbt_done' 'audit_log_start' 'tick_sched_do_timer' 'generic_fillattr' '__add_to_page_cache_locked' '__snd_rawmidi_transmit_ack' '__x64_sys_ptrace' 'run_timer_softirq' 'kauditd_thread' 'n_tty_receive_buf_common' 'do_wait' 'kcm_rfree' 'mod_timer' 'do_nanosleep' 'find_get_pages_range_tag' 'find_alive_thread' 'poll_schedule_timeout' 'xas_clear_mark' 'copy_process' 'ext4_mark_iloc_dirty' 'generic_file_read_iter' 'ktime_get_real_seconds' '__ext4_new_inode' 'dd_has_work' '_find_next_bit' 'blk_mq_sched_dispatch_requests' 'shmem_file_read_iter' 'blk_mq_dispatch_rq_list' 'snd_seq_check_queue' 'add_timer' 'generic_write_end' 'do_signal_stop' 'page_counter_charge' 'echo_char' 'watchdog' [ 107.997399][ T8918] ================================================================== [ 108.005528][ T8918] BUG: KCSAN: data-race in ktime_get_seconds / timekeeping_advance [ 108.013409][ T8918] [ 108.015738][ T8918] write to 0xffffffff88ae90c8 of 280 bytes by interrupt on cpu 0: [ 108.023578][ T8918] timekeeping_advance+0x88e/0xd80 [ 108.028685][ T8918] update_wall_time+0x15/0x20 [ 108.033369][ T8918] tick_do_update_jiffies64+0x1e5/0x2a0 [ 108.038912][ T8918] tick_sched_do_timer+0xc7/0xd0 [ 108.043847][ T8918] tick_sched_timer+0x3f/0xd0 [ 108.048516][ T8918] __hrtimer_run_queues+0x271/0x600 [ 108.053698][ T8918] hrtimer_interrupt+0x226/0x490 [ 108.058682][ T8918] smp_apic_timer_interrupt+0xd8/0x270 [ 108.064205][ T8918] apic_timer_interrupt+0xf/0x20 [ 108.069167][ T8918] __tsan_read8+0x2d/0x110 [ 108.073560][ T8918] vring_map_one_sg+0x45/0x140 [ 108.078299][ T8918] virtqueue_add+0x829/0x1ab0 [ 108.082950][ T8918] virtqueue_add_inbuf_ctx+0x4c/0x64 [ 108.088209][ T8918] try_fill_recv+0x69a/0xe60 [ 108.092773][ T8918] virtnet_poll+0x62d/0x790 [ 108.097250][ T8918] net_rx_action+0x3ad/0xac0 [ 108.101819][ T8918] __do_softirq+0x118/0x34a [ 108.106565][ T8918] run_ksoftirqd+0x41/0x60 [ 108.110957][ T8918] smpboot_thread_fn+0x374/0x4a0 [ 108.115868][ T8918] kthread+0x203/0x230 [ 108.119912][ T8918] ret_from_fork+0x1f/0x30 [ 108.124294][ T8918] [ 108.126601][ T8918] read to 0xffffffff88ae9140 of 8 bytes by task 8918 on cpu 1: [ 108.134303][ T8918] ktime_get_seconds+0x42/0x60 [ 108.139045][ T8918] tcp_rcv_established+0xe79/0xee0 [ 108.144131][ T8918] tcp_v4_do_rcv+0x396/0x4f0 [ 108.148697][ T8918] __release_sock+0x130/0x1e0 [ 108.153450][ T8918] release_sock+0x5e/0x160 [ 108.157859][ T8918] tcp_recvmsg+0x68e/0x1ba0 [ 108.162348][ T8918] inet_recvmsg+0xc1/0x250 [ 108.166748][ T8918] sock_recvmsg+0x8e/0xb0 [ 108.171171][ T8918] sock_read_iter+0x185/0x230 [ 108.175846][ T8918] new_sync_read+0x416/0x450 [ 108.180441][ T8918] __vfs_read+0x9e/0xb0 [ 108.184590][ T8918] vfs_read+0x13e/0x2b0 [ 108.189158][ T8918] ksys_read+0x16a/0x1a0 [ 108.193374][ T8918] __x64_sys_read+0x49/0x60 [ 108.197885][ T8918] do_syscall_64+0xc7/0x3b0 [ 108.202457][ T8918] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 108.208363][ T8918] [ 108.210675][ T8918] Reported by Kernel Concurrency Sanitizer on: [ 108.216848][ T8918] CPU: 1 PID: 8918 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 108.225065][ T8918] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 108.235103][ T8918] ================================================================== [ 108.243137][ T8918] Kernel panic - not syncing: panic_on_warn set ... [ 108.249711][ T8918] CPU: 1 PID: 8918 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 108.258047][ T8918] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 108.268544][ T8918] Call Trace: [ 108.271863][ T8918] dump_stack+0x11d/0x187 [ 108.276386][ T8918] panic+0x210/0x640 [ 108.280273][ T8918] ? vprintk_func+0x89/0x13a [ 108.285562][ T8918] kcsan_report.cold+0xc/0x1a [ 108.290225][ T8918] kcsan_setup_watchpoint+0x3fb/0x440 [ 108.295843][ T8918] ktime_get_seconds+0x42/0x60 [ 108.300607][ T8918] tcp_rcv_established+0xe79/0xee0 [ 108.305705][ T8918] tcp_v4_do_rcv+0x396/0x4f0 [ 108.310278][ T8918] __release_sock+0x130/0x1e0 [ 108.314935][ T8918] release_sock+0x5e/0x160 [ 108.319331][ T8918] tcp_recvmsg+0x68e/0x1ba0 [ 108.323847][ T8918] inet_recvmsg+0xc1/0x250 [ 108.328246][ T8918] ? apparmor_socket_recvmsg+0x38/0x40 [ 108.333691][ T8918] ? inet_sendpage+0xf0/0xf0 [ 108.338264][ T8918] sock_recvmsg+0x8e/0xb0 [ 108.342675][ T8918] sock_read_iter+0x185/0x230 [ 108.347439][ T8918] new_sync_read+0x416/0x450 [ 108.352029][ T8918] __vfs_read+0x9e/0xb0 [ 108.356165][ T8918] vfs_read+0x13e/0x2b0 [ 108.360341][ T8918] ksys_read+0x16a/0x1a0 [ 108.364579][ T8918] __x64_sys_read+0x49/0x60 [ 108.369848][ T8918] do_syscall_64+0xc7/0x3b0 [ 108.374594][ T8918] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 108.380655][ T8918] RIP: 0033:0x47c530 [ 108.385600][ T8918] Code: 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 49 c7 c2 00 00 00 00 49 c7 c0 00 00 00 00 49 c7 c1 00 00 00 00 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30 [ 108.408357][ T8918] RSP: 002b:000000c42024f810 EFLAGS: 00000202 ORIG_RAX: 0000000000000000 [ 108.416961][ T8918] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530 [ 108.425620][ T8918] RDX: 0000000000001000 RSI: 000000c420216000 RDI: 0000000000000003 [ 108.433570][ T8918] RBP: 000000c42024f868 R08: 0000000000000000 R09: 0000000000000000 [ 108.441541][ T8918] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000080 [ 108.449601][ T8918] R13: ffffffffffffffff R14: 0000000000000004 R15: ffffffffffffffff [ 108.458270][ T8918] Kernel Offset: disabled [ 108.462614][ T8918] Rebooting in 86400 seconds..