[ 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 '10.128.1.2' (ECDSA) to the list of known hosts. 2020/06/09 23:35:17 fuzzer started 2020/06/09 23:35:18 dialing manager at 10.128.0.105:35435 2020/06/09 23:35:18 syscalls: 3055 2020/06/09 23:35:18 code coverage: enabled 2020/06/09 23:35:18 comparison tracing: enabled 2020/06/09 23:35:18 extra coverage: enabled 2020/06/09 23:35:18 setuid sandbox: enabled 2020/06/09 23:35:18 namespace sandbox: enabled 2020/06/09 23:35:18 Android sandbox: /sys/fs/selinux/policy does not exist 2020/06/09 23:35:18 fault injection: enabled 2020/06/09 23:35:18 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/06/09 23:35:18 net packet injection: enabled 2020/06/09 23:35:18 net device setup: enabled 2020/06/09 23:35:18 concurrency sanitizer: enabled 2020/06/09 23:35:18 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/06/09 23:35:18 USB emulation: enabled syzkaller login: [ 55.612163][ T8921] KCSAN: could not find function: 'poll_schedule_timeout' [ 56.574847][ T8921] KCSAN: could not find function: '_find_next_bit' 2020/06/09 23:35:24 adding functions to KCSAN blacklist: 'do_exit' 'echo_char' 'iput' 'ext4_da_write_end' 'shmem_add_to_page_cache' 'generic_write_end' 'page_counter_charge' 'pcpu_alloc' 'fsnotify' 'do_signal_stop' 'xas_find_marked' '__snd_rawmidi_transmit_ack' 'ext4_mb_find_by_goal' 'do_syslog' 'tick_nohz_idle_stop_tick' 'generic_file_read_iter' '__x64_sys_ptrace' 'do_nanosleep' 'blk_mq_get_request' 'xas_clear_mark' 'run_timer_softirq' 'ext4_handle_inode_extension' '__add_to_page_cache_locked' 'generic_fillattr' 'emulator_read_write_onepage' 'ktime_get_real_seconds' 'blk_mq_sched_dispatch_requests' 'ep_poll' 'find_get_pages_range_tag' 'complete_signal' 'file_update_time' 'copy_process' 'tick_sched_do_timer' 'ext4_free_inodes_count' 'shmem_file_read_iter' 'ktime_get_ts64' 'vfs_fsync_range' 'ext4_mark_iloc_dirty' 'ext4_setattr' 'poll_schedule_timeout' 'blk_mq_dispatch_rq_list' '__filemap_fdatawrite_range' '__ext4_new_inode' '_find_next_bit' 'mod_timer' 'kcm_rfree' 'add_timer' 'kauditd_thread' 'wbt_done' 'io_sq_thread' 'audit_log_start' 'futex_wait_queue_me' 'do_wait' [ 183.000854][ T8911] ================================================================== [ 183.008995][ T8911] BUG: KCSAN: data-race in ktime_get_seconds / timekeeping_advance [ 183.016872][ T8911] [ 183.019199][ T8911] write to 0xffffffff88ae90c8 of 280 bytes by interrupt on cpu 0: [ 183.026995][ T8911] timekeeping_advance+0x88e/0xd80 [ 183.032161][ T8911] update_wall_time+0x15/0x20 [ 183.036816][ T8911] tick_do_update_jiffies64+0x1e5/0x2a0 [ 183.042383][ T8911] tick_sched_do_timer+0xc7/0xd0 [ 183.047303][ T8911] tick_sched_timer+0x3f/0xd0 [ 183.052001][ T8911] __hrtimer_run_queues+0x271/0x600 [ 183.057213][ T8911] hrtimer_interrupt+0x226/0x490 [ 183.062126][ T8911] smp_apic_timer_interrupt+0xd8/0x270 [ 183.067560][ T8911] apic_timer_interrupt+0xf/0x20 [ 183.072475][ T8911] __tsan_read4+0x71/0x110 [ 183.076990][ T8911] nf_conntrack_tcp_packet+0x1530/0x2fe0 [ 183.082670][ T8911] nf_conntrack_in+0x3fe/0xa60 [ 183.087423][ T8911] ipv4_conntrack_in+0x23/0x40 [ 183.092174][ T8911] nf_hook_slow+0x7c/0x160 [ 183.096569][ T8911] nf_hook_slow_list+0x140/0x29f [ 183.101484][ T8911] ip_sublist_rcv+0x4f9/0x530 [ 183.106160][ T8911] ip_list_rcv+0x2f3/0x321 [ 183.110555][ T8911] __netif_receive_skb_list_core+0x368/0x5c0 [ 183.116513][ T8911] netif_receive_skb_list_internal+0x5c7/0x810 [ 183.122655][ T8911] gro_normal_list.part.0+0x37/0xa0 [ 183.127830][ T8911] gro_normal_one+0x14c/0x160 [ 183.132484][ T8911] napi_gro_receive+0x27d/0x2f0 [ 183.137321][ T8911] receive_buf+0x24c/0x3420 [ 183.141797][ T8911] virtnet_poll+0x343/0x790 [ 183.146273][ T8911] net_rx_action+0x3ad/0xac0 [ 183.150847][ T8911] __do_softirq+0x118/0x34a [ 183.155331][ T8911] run_ksoftirqd+0x41/0x60 [ 183.159733][ T8911] smpboot_thread_fn+0x374/0x4a0 [ 183.164657][ T8911] kthread+0x203/0x230 [ 183.168710][ T8911] ret_from_fork+0x1f/0x30 [ 183.173104][ T8911] [ 183.175410][ T8911] read to 0xffffffff88ae9140 of 8 bytes by task 8911 on cpu 1: [ 183.182949][ T8911] ktime_get_seconds+0x42/0x60 [ 183.187689][ T8911] tcp_rcv_established+0xe79/0xee0 [ 183.192773][ T8911] tcp_v4_do_rcv+0x396/0x4f0 [ 183.197336][ T8911] __release_sock+0x130/0x1e0 [ 183.201985][ T8911] release_sock+0x5e/0x160 [ 183.206382][ T8911] tcp_recvmsg+0x68e/0x1ba0 [ 183.210872][ T8911] inet_recvmsg+0xc1/0x250 [ 183.215265][ T8911] sock_recvmsg+0x8e/0xb0 [ 183.219567][ T8911] sock_read_iter+0x185/0x230 [ 183.224227][ T8911] new_sync_read+0x416/0x450 [ 183.228792][ T8911] __vfs_read+0x9e/0xb0 [ 183.232978][ T8911] vfs_read+0x13e/0x2b0 [ 183.237110][ T8911] ksys_read+0x16a/0x1a0 [ 183.241330][ T8911] __x64_sys_read+0x49/0x60 [ 183.245816][ T8911] do_syscall_64+0xc7/0x3b0 [ 183.250298][ T8911] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 183.256161][ T8911] [ 183.258461][ T8911] Reported by Kernel Concurrency Sanitizer on: [ 183.264599][ T8911] CPU: 1 PID: 8911 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 183.272809][ T8911] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 183.283642][ T8911] ================================================================== [ 183.291679][ T8911] Kernel panic - not syncing: panic_on_warn set ... [ 183.298244][ T8911] CPU: 1 PID: 8911 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 183.306461][ T8911] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 183.316490][ T8911] Call Trace: [ 183.319761][ T8911] dump_stack+0x11d/0x187 [ 183.324071][ T8911] panic+0x210/0x640 [ 183.327964][ T8911] ? vprintk_func+0x89/0x13a [ 183.332547][ T8911] kcsan_report.cold+0xc/0x1a [ 183.337203][ T8911] kcsan_setup_watchpoint+0x3fb/0x440 [ 183.342550][ T8911] ktime_get_seconds+0x42/0x60 [ 183.347291][ T8911] tcp_rcv_established+0xe79/0xee0 [ 183.352400][ T8911] tcp_v4_do_rcv+0x396/0x4f0 [ 183.356989][ T8911] __release_sock+0x130/0x1e0 [ 183.361665][ T8911] release_sock+0x5e/0x160 [ 183.366074][ T8911] tcp_recvmsg+0x68e/0x1ba0 [ 183.370563][ T8911] inet_recvmsg+0xc1/0x250 [ 183.374977][ T8911] ? apparmor_socket_recvmsg+0x38/0x40 [ 183.380500][ T8911] ? inet_sendpage+0xf0/0xf0 [ 183.385080][ T8911] sock_recvmsg+0x8e/0xb0 [ 183.389387][ T8911] sock_read_iter+0x185/0x230 [ 183.394046][ T8911] new_sync_read+0x416/0x450 [ 183.398617][ T8911] __vfs_read+0x9e/0xb0 [ 183.402844][ T8911] vfs_read+0x13e/0x2b0 [ 183.406973][ T8911] ksys_read+0x16a/0x1a0 [ 183.411192][ T8911] __x64_sys_read+0x49/0x60 [ 183.415673][ T8911] do_syscall_64+0xc7/0x3b0 [ 183.420167][ T8911] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 183.426066][ T8911] RIP: 0033:0x4b3cdb [ 183.429942][ T8911] 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 [ 183.450634][ T8911] RSP: 002b:000000c00004b8b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000000 [ 183.459033][ T8911] RAX: ffffffffffffffda RBX: 000000c00002c000 RCX: 00000000004b3cdb [ 183.466980][ T8911] RDX: 0000000000001000 RSI: 000000c000298000 RDI: 0000000000000006 [ 183.474948][ T8911] RBP: 000000c00004b908 R08: 0000000000000001 R09: 0000000000000002 [ 183.482910][ T8911] R10: 000000000000083e R11: 0000000000000212 R12: ffffffffffffffff [ 183.490867][ T8911] R13: 0000000000000400 R14: 0000000000000002 R15: 0000000000000002 [ 183.500221][ T8911] Kernel Offset: disabled [ 183.504551][ T8911] Rebooting in 86400 seconds..