[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.127' (ECDSA) to the list of known hosts. 2020/06/12 14:52:05 fuzzer started 2020/06/12 14:52:06 dialing manager at 10.128.0.105:39483 2020/06/12 14:52:06 syscalls: 3085 2020/06/12 14:52:06 code coverage: enabled 2020/06/12 14:52:06 comparison tracing: enabled 2020/06/12 14:52:06 extra coverage: enabled 2020/06/12 14:52:06 setuid sandbox: enabled 2020/06/12 14:52:06 namespace sandbox: enabled 2020/06/12 14:52:06 Android sandbox: /sys/fs/selinux/policy does not exist 2020/06/12 14:52:06 fault injection: enabled 2020/06/12 14:52:06 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/06/12 14:52:06 net packet injection: enabled 2020/06/12 14:52:06 net device setup: enabled 2020/06/12 14:52:06 concurrency sanitizer: enabled 2020/06/12 14:52:06 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/06/12 14:52:06 USB emulation: enabled syzkaller login: [ 56.150009][ T8918] KCSAN: could not find function: '_find_next_bit' [ 58.122941][ T8918] KCSAN: could not find function: 'poll_schedule_timeout' 2020/06/12 14:52:12 adding functions to KCSAN blacklist: 'dd_has_work' 'audit_log_start' 'ktime_get_ts64' 'unix_release_sock' 'do_nanosleep' 'generic_write_end' 'find_get_pages_range_tag' 'ext4_mark_iloc_dirty' 'blk_mq_sched_dispatch_requests' 'complete_signal' 'generic_file_read_iter' '__add_to_page_cache_locked' 'pcpu_alloc' 'bond_start_xmit' 'io_sq_thread' 'step_into' 'file_update_time' 'ext4_free_inodes_count' '__x64_sys_ptrace' 'wbt_issue' 'copy_process' '__ext4_new_inode' 'echo_char' 'ext4_writepages' 'ep_poll' 'xas_clear_mark' 'tick_nohz_idle_stop_tick' 'page_counter_charge' '_find_next_bit' '__snd_rawmidi_transmit_ack' 'do_exit' 'kcm_rfree' 'add_timer' 'futex_wait_queue_me' 'mod_timer' 'tick_sched_do_timer' 'blk_mq_dispatch_rq_list' 'poll_schedule_timeout' 'blk_mq_get_request' 'run_timer_softirq' 'ktime_get_real_seconds' '__mark_inode_dirty' 'do_signal_stop' 'kauditd_thread' 'do_syslog' 'pipe_double_lock' 'generic_fillattr' [ 155.001654][ T8919] ================================================================== [ 155.009962][ T8919] BUG: KCSAN: data-race in ktime_get_seconds / timekeeping_advance [ 155.017845][ T8919] [ 155.020158][ T8919] write to 0xffffffff88ae90c8 of 280 bytes by interrupt on cpu 0: [ 155.028005][ T8919] timekeeping_advance+0x88e/0xd80 [ 155.033097][ T8919] update_wall_time+0x15/0x20 [ 155.037754][ T8919] tick_do_update_jiffies64+0x1e5/0x2a0 [ 155.043277][ T8919] tick_sched_do_timer+0xc7/0xd0 [ 155.048206][ T8919] tick_sched_timer+0x3f/0xd0 [ 155.052863][ T8919] __hrtimer_run_queues+0x271/0x600 [ 155.058040][ T8919] hrtimer_interrupt+0x226/0x490 [ 155.062958][ T8919] smp_apic_timer_interrupt+0xd8/0x270 [ 155.068402][ T8919] apic_timer_interrupt+0xf/0x20 [ 155.073318][ T8919] __tsan_read8+0x61/0x110 [ 155.077726][ T8919] virtqueue_add+0xa61/0x1ab0 [ 155.082381][ T8919] virtqueue_add_inbuf_ctx+0x4c/0x64 [ 155.087647][ T8919] try_fill_recv+0x69a/0xe60 [ 155.092227][ T8919] virtnet_poll+0x62d/0x790 [ 155.096710][ T8919] net_rx_action+0x3ad/0xac0 [ 155.101287][ T8919] __do_softirq+0x118/0x34a [ 155.105777][ T8919] run_ksoftirqd+0x41/0x60 [ 155.110172][ T8919] smpboot_thread_fn+0x374/0x4a0 [ 155.115089][ T8919] kthread+0x203/0x230 [ 155.119150][ T8919] ret_from_fork+0x1f/0x30 [ 155.123543][ T8919] [ 155.125880][ T8919] read to 0xffffffff88ae9140 of 8 bytes by task 8919 on cpu 1: [ 155.133408][ T8919] ktime_get_seconds+0x42/0x60 [ 155.138151][ T8919] tcp_rcv_established+0xe79/0xee0 [ 155.143243][ T8919] tcp_v4_do_rcv+0x396/0x4f0 [ 155.147811][ T8919] __release_sock+0x130/0x1e0 [ 155.152494][ T8919] release_sock+0x5e/0x160 [ 155.156898][ T8919] tcp_recvmsg+0x68e/0x1ba0 [ 155.162009][ T8919] inet_recvmsg+0xc1/0x250 [ 155.166408][ T8919] sock_recvmsg+0x8e/0xb0 [ 155.170715][ T8919] sock_read_iter+0x185/0x230 [ 155.175385][ T8919] new_sync_read+0x416/0x450 [ 155.179967][ T8919] __vfs_read+0x9e/0xb0 [ 155.184115][ T8919] vfs_read+0x13e/0x2b0 [ 155.188244][ T8919] ksys_read+0x16a/0x1a0 [ 155.192475][ T8919] __x64_sys_read+0x49/0x60 [ 155.196975][ T8919] do_syscall_64+0xc7/0x3b0 [ 155.201456][ T8919] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 155.207355][ T8919] [ 155.209662][ T8919] Reported by Kernel Concurrency Sanitizer on: [ 155.215827][ T8919] CPU: 1 PID: 8919 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 155.224039][ T8919] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 155.234083][ T8919] ================================================================== [ 155.242118][ T8919] Kernel panic - not syncing: panic_on_warn set ... [ 155.248681][ T8919] CPU: 1 PID: 8919 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 155.256900][ T8919] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 155.266947][ T8919] Call Trace: [ 155.270232][ T8919] dump_stack+0x11d/0x187 [ 155.274545][ T8919] panic+0x210/0x640 [ 155.278486][ T8919] ? vprintk_func+0x89/0x13a [ 155.283085][ T8919] kcsan_report.cold+0xc/0x1a [ 155.287747][ T8919] kcsan_setup_watchpoint+0x3fb/0x440 [ 155.293098][ T8919] ktime_get_seconds+0x42/0x60 [ 155.297842][ T8919] tcp_rcv_established+0xe79/0xee0 [ 155.302938][ T8919] tcp_v4_do_rcv+0x396/0x4f0 [ 155.307510][ T8919] __release_sock+0x130/0x1e0 [ 155.312181][ T8919] release_sock+0x5e/0x160 [ 155.316598][ T8919] tcp_recvmsg+0x68e/0x1ba0 [ 155.321092][ T8919] inet_recvmsg+0xc1/0x250 [ 155.325497][ T8919] ? apparmor_socket_recvmsg+0x38/0x40 [ 155.330954][ T8919] ? inet_sendpage+0xf0/0xf0 [ 155.335524][ T8919] sock_recvmsg+0x8e/0xb0 [ 155.339834][ T8919] sock_read_iter+0x185/0x230 [ 155.344508][ T8919] new_sync_read+0x416/0x450 [ 155.349081][ T8919] __vfs_read+0x9e/0xb0 [ 155.353230][ T8919] vfs_read+0x13e/0x2b0 [ 155.357401][ T8919] ksys_read+0x16a/0x1a0 [ 155.361636][ T8919] __x64_sys_read+0x49/0x60 [ 155.366129][ T8919] do_syscall_64+0xc7/0x3b0 [ 155.370620][ T8919] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 155.376492][ T8919] RIP: 0033:0x4b3cdb [ 155.380390][ T8919] Code: ff e9 69 ff ff ff cc cc cc cc cc cc cc cc cc e8 bb a1 f8 ff 48 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 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 [ 155.400070][ T8919] RSP: 002b:000000c0000f38b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000000 [ 155.408470][ T8919] RAX: ffffffffffffffda RBX: 000000c00002e800 RCX: 00000000004b3cdb [ 155.416415][ T8919] RDX: 0000000000001000 RSI: 000000c00047c000 RDI: 0000000000000006 [ 155.424361][ T8919] RBP: 000000c0000f3908 R08: 00007ffe7e7f9001 R09: 000000000000009b [ 155.432330][ T8919] R10: 0000000000000072 R11: 0000000000000212 R12: 0000000000000003 [ 155.440282][ T8919] R13: 000000c0000ad680 R14: 0000000000000002 R15: 0000000000000002 [ 155.449507][ T8919] Kernel Offset: disabled [ 155.453823][ T8919] Rebooting in 86400 seconds..