[ 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 '10.128.0.211' (ECDSA) to the list of known hosts. 2020/05/08 12:32:31 fuzzer started 2020/05/08 12:32:31 dialing manager at 10.128.0.105:46419 2020/05/08 12:32:42 syscalls: 3055 2020/05/08 12:32:42 code coverage: enabled 2020/05/08 12:32:42 comparison tracing: enabled 2020/05/08 12:32:42 extra coverage: enabled 2020/05/08 12:32:42 setuid sandbox: enabled 2020/05/08 12:32:42 namespace sandbox: enabled 2020/05/08 12:32:42 Android sandbox: /sys/fs/selinux/policy does not exist 2020/05/08 12:32:42 fault injection: enabled 2020/05/08 12:32:42 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/05/08 12:32:42 net packet injection: enabled 2020/05/08 12:32:42 net device setup: enabled 2020/05/08 12:32:42 concurrency sanitizer: enabled 2020/05/08 12:32:42 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/05/08 12:32:42 USB emulation: enabled syzkaller login: [ 63.761593][ T8916] KCSAN: could not find function: '_find_next_bit' 2020/05/08 12:32:45 adding functions to KCSAN blacklist: 'do_exit' '__add_to_page_cache_locked' 'do_syslog' 'page_counter_charge' 'add_timer' 'xas_clear_mark' 'mod_timer' 'pcpu_alloc' 'n_tty_receive_buf_common' 'blk_mq_sched_dispatch_requests' 'copy_process' 'ext4_free_inodes_count' 'generic_fillattr' 'tick_nohz_idle_stop_tick' 'tick_nohz_next_event' 'find_get_pages_range_tag' 'run_timer_softirq' '__ext4_new_inode' '_find_next_bit' 'futex_wait_queue_me' 'ext4_mark_iloc_dirty' 'generic_write_end' 'ep_poll' 'blk_mq_dispatch_rq_list' 'do_nanosleep' 'shmem_file_read_iter' [ 132.994968][ T8912] ================================================================== [ 133.003133][ T8912] BUG: KCSAN: data-race in ktime_get_seconds / timekeeping_advance [ 133.011022][ T8912] [ 133.013356][ T8912] write to 0xffffffff88ae90c8 of 280 bytes by interrupt on cpu 0: [ 133.021170][ T8912] timekeeping_advance+0x88e/0xd80 [ 133.026264][ T8912] update_wall_time+0x15/0x20 [ 133.030939][ T8912] tick_do_update_jiffies64+0x1e5/0x2a0 [ 133.036462][ T8912] tick_sched_do_timer+0xc7/0xd0 [ 133.041396][ T8912] tick_sched_timer+0x3f/0xd0 [ 133.046049][ T8912] __hrtimer_run_queues+0x271/0x600 [ 133.051221][ T8912] hrtimer_interrupt+0x226/0x490 [ 133.056150][ T8912] smp_apic_timer_interrupt+0xd8/0x270 [ 133.061588][ T8912] apic_timer_interrupt+0xf/0x20 [ 133.066512][ T8912] __sanitizer_cov_trace_pc+0x0/0x50 [ 133.071792][ T8912] __read_once_size+0x2f/0xd0 [ 133.076448][ T8912] ipt_do_table+0x218/0xe70 [ 133.080930][ T8912] iptable_filter_hook+0x44/0x60 [ 133.085849][ T8912] nf_hook_slow+0x7c/0x160 [ 133.090354][ T8912] ip_local_deliver+0x1f2/0x220 [ 133.095227][ T8912] ip_sublist_rcv_finish+0xf0/0x140 [ 133.100401][ T8912] ip_sublist_rcv+0x3f8/0x530 [ 133.105055][ T8912] ip_list_rcv+0x2f3/0x321 [ 133.109450][ T8912] __netif_receive_skb_list_core+0x368/0x5c0 [ 133.115406][ T8912] netif_receive_skb_list_internal+0x5c7/0x810 [ 133.121543][ T8912] gro_normal_list.part.0+0x37/0xa0 [ 133.126738][ T8912] gro_normal_one+0x14c/0x160 [ 133.131424][ T8912] napi_gro_receive+0x27d/0x2f0 [ 133.136255][ T8912] receive_buf+0x24c/0x3420 [ 133.140738][ T8912] virtnet_poll+0x343/0x790 [ 133.145221][ T8912] net_rx_action+0x3ad/0xac0 [ 133.149803][ T8912] __do_softirq+0x118/0x34a [ 133.154286][ T8912] run_ksoftirqd+0x41/0x60 [ 133.158682][ T8912] smpboot_thread_fn+0x374/0x4a0 [ 133.163598][ T8912] kthread+0x203/0x230 [ 133.167662][ T8912] ret_from_fork+0x1f/0x30 [ 133.172051][ T8912] [ 133.174359][ T8912] read to 0xffffffff88ae9140 of 8 bytes by task 8912 on cpu 1: [ 133.181874][ T8912] ktime_get_seconds+0x42/0x60 [ 133.186632][ T8912] tcp_rcv_established+0xe79/0xee0 [ 133.191725][ T8912] tcp_v4_do_rcv+0x396/0x4f0 [ 133.196307][ T8912] __release_sock+0x130/0x1e0 [ 133.200992][ T8912] release_sock+0x5e/0x160 [ 133.205386][ T8912] tcp_recvmsg+0x68e/0x1ba0 [ 133.209867][ T8912] inet_recvmsg+0xc1/0x250 [ 133.214297][ T8912] sock_recvmsg+0x8e/0xb0 [ 133.218606][ T8912] sock_read_iter+0x185/0x230 [ 133.223263][ T8912] new_sync_read+0x416/0x450 [ 133.227871][ T8912] __vfs_read+0x9e/0xb0 [ 133.232018][ T8912] vfs_read+0x13e/0x2b0 [ 133.236177][ T8912] ksys_read+0x16a/0x1a0 [ 133.240396][ T8912] __x64_sys_read+0x49/0x60 [ 133.244883][ T8912] do_syscall_64+0xc7/0x3b0 [ 133.249372][ T8912] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 133.255232][ T8912] [ 133.257532][ T8912] Reported by Kernel Concurrency Sanitizer on: [ 133.263664][ T8912] CPU: 1 PID: 8912 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 133.272032][ T8912] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 133.282080][ T8912] ================================================================== [ 133.290183][ T8912] Kernel panic - not syncing: panic_on_warn set ... [ 133.296762][ T8912] CPU: 1 PID: 8912 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 133.304983][ T8912] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 133.315030][ T8912] Call Trace: [ 133.319985][ T8912] dump_stack+0x11d/0x187 [ 133.324441][ T8912] panic+0x210/0x640 [ 133.328322][ T8912] ? vprintk_func+0x89/0x13a [ 133.332892][ T8912] kcsan_report.cold+0xc/0x1a [ 133.337552][ T8912] kcsan_setup_watchpoint+0x3fb/0x440 [ 133.342910][ T8912] ktime_get_seconds+0x42/0x60 [ 133.347666][ T8912] tcp_rcv_established+0xe79/0xee0 [ 133.352767][ T8912] tcp_v4_do_rcv+0x396/0x4f0 [ 133.357356][ T8912] __release_sock+0x130/0x1e0 [ 133.362012][ T8912] release_sock+0x5e/0x160 [ 133.366437][ T8912] tcp_recvmsg+0x68e/0x1ba0 [ 133.370925][ T8912] inet_recvmsg+0xc1/0x250 [ 133.375321][ T8912] ? apparmor_socket_recvmsg+0x38/0x40 [ 133.380757][ T8912] ? inet_sendpage+0xf0/0xf0 [ 133.385329][ T8912] sock_recvmsg+0x8e/0xb0 [ 133.389647][ T8912] sock_read_iter+0x185/0x230 [ 133.394320][ T8912] new_sync_read+0x416/0x450 [ 133.398894][ T8912] __vfs_read+0x9e/0xb0 [ 133.403029][ T8912] vfs_read+0x13e/0x2b0 [ 133.407163][ T8912] ksys_read+0x16a/0x1a0 [ 133.411414][ T8912] __x64_sys_read+0x49/0x60 [ 133.415902][ T8912] do_syscall_64+0xc7/0x3b0 [ 133.420385][ T8912] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 133.426267][ T8912] RIP: 0033:0x47c530 [ 133.430144][ T8912] 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 [ 133.449728][ T8912] RSP: 002b:000000c42034f7d8 EFLAGS: 00000212 ORIG_RAX: 0000000000000000 [ 133.458116][ T8912] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530 [ 133.466063][ T8912] RDX: 0000000000001000 RSI: 000000c42019c000 RDI: 0000000000000003 [ 133.474052][ T8912] RBP: 000000c42034f830 R08: 0000000000000000 R09: 0000000000000000 [ 133.482000][ T8912] R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000002 [ 133.489948][ T8912] R13: ffffffffffffffff R14: 0000000000000004 R15: ffffffffffffffff [ 133.498836][ T8912] Kernel Offset: disabled [ 133.503166][ T8912] Rebooting in 86400 seconds..