Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.138' (ECDSA) to the list of known hosts. 2020/06/14 02:38:33 fuzzer started 2020/06/14 02:38:33 dialing manager at 10.128.0.105:38693 2020/06/14 02:38:33 syscalls: 3085 2020/06/14 02:38:33 code coverage: enabled 2020/06/14 02:38:33 comparison tracing: enabled 2020/06/14 02:38:33 extra coverage: enabled 2020/06/14 02:38:33 setuid sandbox: enabled 2020/06/14 02:38:33 namespace sandbox: enabled 2020/06/14 02:38:33 Android sandbox: /sys/fs/selinux/policy does not exist 2020/06/14 02:38:33 fault injection: enabled 2020/06/14 02:38:33 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/06/14 02:38:33 net packet injection: enabled 2020/06/14 02:38:33 net device setup: enabled 2020/06/14 02:38:33 concurrency sanitizer: enabled 2020/06/14 02:38:33 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/06/14 02:38:33 USB emulation: enabled syzkaller login: [ 50.874550][ T8913] KCSAN: could not find function: '_find_next_bit' 2020/06/14 02:38:37 adding functions to KCSAN blacklist: 'add_timer' '_find_next_bit' 'file_update_time' 'ext4_mark_iloc_dirty' 'generic_update_time' 'tick_sched_do_timer' '__perf_event_overflow' 'generic_write_end' 'copy_process' 'do_syslog' 'run_timer_softirq' 'ext4_free_inodes_count' 'blk_mq_dispatch_rq_list' 'page_counter_charge' 'ktime_get_real_seconds' 'dd_has_work' 'alloc_pid' 'generic_fillattr' 'tick_nohz_idle_stop_tick' 'pcpu_alloc' 'sit_tunnel_xmit' 'echo_char' 'filemap_map_pages' 'ep_poll' 'xas_clear_mark' 'mod_timer' 'blk_mq_sched_dispatch_requests' '__send_signal' 'futex_wait_queue_me' 'blk_mq_get_request' '__ext4_new_inode' 'do_nanosleep' 'find_get_pages_range_tag' 'io_sq_thread' [ 188.027010][ T8904] ================================================================== [ 188.035283][ T8904] BUG: KCSAN: data-race in ktime_get_seconds / timekeeping_advance [ 188.043144][ T8904] [ 188.045468][ T8904] write to 0xffffffff88ae90c8 of 280 bytes by interrupt on cpu 0: [ 188.053265][ T8904] timekeeping_advance+0x88e/0xd80 [ 188.058368][ T8904] update_wall_time+0x15/0x20 [ 188.063049][ T8904] tick_do_update_jiffies64+0x1e5/0x2a0 [ 188.068945][ T8904] tick_sched_do_timer+0xc7/0xd0 [ 188.074090][ T8904] tick_sched_timer+0x3f/0xd0 [ 188.078773][ T8904] __hrtimer_run_queues+0x271/0x600 [ 188.084054][ T8904] hrtimer_interrupt+0x226/0x490 [ 188.088988][ T8904] smp_apic_timer_interrupt+0xd8/0x270 [ 188.094541][ T8904] apic_timer_interrupt+0xf/0x20 [ 188.099479][ T8904] __tsan_read8+0xe4/0x110 [ 188.103870][ T8904] nf_conntrack_in+0x20e/0xa60 [ 188.108890][ T8904] ipv4_conntrack_in+0x23/0x40 [ 188.113632][ T8904] nf_hook_slow+0x7c/0x160 [ 188.118026][ T8904] nf_hook_slow_list+0x140/0x29f [ 188.123040][ T8904] ip_sublist_rcv+0x4f9/0x530 [ 188.128822][ T8904] ip_list_rcv+0x2f3/0x321 [ 188.133242][ T8904] __netif_receive_skb_list_core+0x368/0x5c0 [ 188.139216][ T8904] netif_receive_skb_list_internal+0x5c7/0x810 [ 188.145372][ T8904] gro_normal_list.part.0+0x37/0xa0 [ 188.150562][ T8904] gro_normal_one+0x14c/0x160 [ 188.155217][ T8904] napi_gro_receive+0x27d/0x2f0 [ 188.160065][ T8904] receive_buf+0x24c/0x3420 [ 188.164541][ T8904] virtnet_poll+0x343/0x790 [ 188.169020][ T8904] net_rx_action+0x3ad/0xac0 [ 188.173587][ T8904] __do_softirq+0x118/0x34a [ 188.178066][ T8904] run_ksoftirqd+0x41/0x60 [ 188.182485][ T8904] smpboot_thread_fn+0x374/0x4a0 [ 188.187402][ T8904] kthread+0x203/0x230 [ 188.191453][ T8904] ret_from_fork+0x1f/0x30 [ 188.196009][ T8904] [ 188.198318][ T8904] read to 0xffffffff88ae9140 of 8 bytes by task 8904 on cpu 1: [ 188.206372][ T8904] ktime_get_seconds+0x42/0x60 [ 188.211138][ T8904] tcp_rcv_established+0xe79/0xee0 [ 188.216223][ T8904] tcp_v4_do_rcv+0x396/0x4f0 [ 188.220790][ T8904] __release_sock+0x130/0x1e0 [ 188.225448][ T8904] release_sock+0x5e/0x160 [ 188.229854][ T8904] tcp_recvmsg+0x68e/0x1ba0 [ 188.234335][ T8904] inet_recvmsg+0xc1/0x250 [ 188.238867][ T8904] sock_recvmsg+0x8e/0xb0 [ 188.243191][ T8904] sock_read_iter+0x185/0x230 [ 188.247872][ T8904] new_sync_read+0x416/0x450 [ 188.252447][ T8904] __vfs_read+0x9e/0xb0 [ 188.256579][ T8904] vfs_read+0x13e/0x2b0 [ 188.260711][ T8904] ksys_read+0x16a/0x1a0 [ 188.264929][ T8904] __x64_sys_read+0x49/0x60 [ 188.269426][ T8904] do_syscall_64+0xc7/0x3b0 [ 188.273924][ T8904] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 188.279925][ T8904] [ 188.282230][ T8904] Reported by Kernel Concurrency Sanitizer on: [ 188.288380][ T8904] CPU: 1 PID: 8904 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 188.296603][ T8904] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 188.306660][ T8904] ================================================================== [ 188.314710][ T8904] Kernel panic - not syncing: panic_on_warn set ... [ 188.321308][ T8904] CPU: 1 PID: 8904 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 188.329532][ T8904] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 188.339651][ T8904] Call Trace: [ 188.342926][ T8904] dump_stack+0x11d/0x187 [ 188.347240][ T8904] panic+0x210/0x640 [ 188.351127][ T8904] ? vprintk_func+0x89/0x13a [ 188.355713][ T8904] kcsan_report.cold+0xc/0x1a [ 188.360395][ T8904] kcsan_setup_watchpoint+0x3fb/0x440 [ 188.365747][ T8904] ktime_get_seconds+0x42/0x60 [ 188.370495][ T8904] tcp_rcv_established+0xe79/0xee0 [ 188.375605][ T8904] tcp_v4_do_rcv+0x396/0x4f0 [ 188.380175][ T8904] __release_sock+0x130/0x1e0 [ 188.384829][ T8904] release_sock+0x5e/0x160 [ 188.389225][ T8904] tcp_recvmsg+0x68e/0x1ba0 [ 188.394533][ T8904] inet_recvmsg+0xc1/0x250 [ 188.399020][ T8904] ? apparmor_socket_recvmsg+0x38/0x40 [ 188.404471][ T8904] ? inet_sendpage+0xf0/0xf0 [ 188.409039][ T8904] sock_recvmsg+0x8e/0xb0 [ 188.413348][ T8904] sock_read_iter+0x185/0x230 [ 188.418012][ T8904] new_sync_read+0x416/0x450 [ 188.422588][ T8904] __vfs_read+0x9e/0xb0 [ 188.426726][ T8904] vfs_read+0x13e/0x2b0 [ 188.430868][ T8904] ksys_read+0x16a/0x1a0 [ 188.435100][ T8904] __x64_sys_read+0x49/0x60 [ 188.439894][ T8904] do_syscall_64+0xc7/0x3b0 [ 188.444392][ T8904] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 188.450358][ T8904] RIP: 0033:0x4b3cdb [ 188.454248][ T8904] 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 [ 188.474091][ T8904] RSP: 002b:000000c0000ef890 EFLAGS: 00000206 ORIG_RAX: 0000000000000000 [ 188.482569][ T8904] RAX: ffffffffffffffda RBX: 000000c00002e800 RCX: 00000000004b3cdb [ 188.490542][ T8904] RDX: 0000000000001000 RSI: 000000c000132000 RDI: 0000000000000006 [ 188.498709][ T8904] RBP: 000000c0000ef8e0 R08: 0000000000000001 R09: 0000000000000002 [ 188.506676][ T8904] R10: 00000000000021de R11: 0000000000000206 R12: 0000000000002864 [ 188.514648][ T8904] R13: 0000000000000200 R14: 0000000000000004 R15: 0000000000000002 [ 188.524210][ T8904] Kernel Offset: disabled [ 188.528531][ T8904] Rebooting in 86400 seconds..