[ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ 43.190665][ T8837] bash (8837) used greatest stack depth: 10440 bytes left [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.51' (ECDSA) to the list of known hosts. 2020/06/13 12:07:27 fuzzer started 2020/06/13 12:07:28 dialing manager at 10.128.0.105:43693 2020/06/13 12:07:32 syscalls: 3085 2020/06/13 12:07:32 code coverage: enabled 2020/06/13 12:07:32 comparison tracing: enabled 2020/06/13 12:07:32 extra coverage: enabled 2020/06/13 12:07:32 setuid sandbox: enabled 2020/06/13 12:07:32 namespace sandbox: enabled 2020/06/13 12:07:32 Android sandbox: /sys/fs/selinux/policy does not exist 2020/06/13 12:07:32 fault injection: enabled 2020/06/13 12:07:32 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/06/13 12:07:32 net packet injection: enabled 2020/06/13 12:07:32 net device setup: enabled 2020/06/13 12:07:32 concurrency sanitizer: enabled 2020/06/13 12:07:32 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/06/13 12:07:32 USB emulation: enabled syzkaller login: [ 56.532377][ T8926] KCSAN: could not find function: '_find_next_bit' 2020/06/13 12:07:35 adding functions to KCSAN blacklist: 'ext4_free_inodes_count' 'generic_write_end' 'pcpu_alloc' 'page_counter_charge' 'ext4_mark_iloc_dirty' 'echo_char' 'copy_process' 'run_timer_softirq' 'file_update_time' 'find_get_pages_range_tag' '_find_next_bit' '__ext4_new_inode' 'ep_poll' '__send_signal' 'do_nanosleep' 'generic_fillattr' 'xprt_connect' 'blk_mq_dispatch_rq_list' 'xas_clear_mark' 'futex_wait_queue_me' 'mod_timer' [ 73.987694][ T8914] ================================================================== [ 73.996171][ T8914] BUG: KCSAN: data-race in ktime_get_seconds / timekeeping_advance [ 74.005436][ T8914] [ 74.007771][ T8914] write to 0xffffffff88ae90c8 of 280 bytes by interrupt on cpu 1: [ 74.015582][ T8914] timekeeping_advance+0x88e/0xd80 [ 74.020797][ T8914] update_wall_time+0x15/0x20 [ 74.025617][ T8914] tick_do_update_jiffies64+0x1e5/0x2a0 [ 74.031701][ T8914] tick_sched_do_timer+0xc7/0xd0 [ 74.036629][ T8914] tick_sched_timer+0x3f/0xd0 [ 74.043469][ T8914] __hrtimer_run_queues+0x271/0x600 [ 74.048665][ T8914] hrtimer_interrupt+0x226/0x490 [ 74.053596][ T8914] smp_apic_timer_interrupt+0xd8/0x270 [ 74.059035][ T8914] apic_timer_interrupt+0xf/0x20 [ 74.063969][ T8914] __tsan_read8+0x30/0x110 [ 74.068362][ T8914] __netif_receive_skb_core+0x536/0x2120 [ 74.073968][ T8914] __netif_receive_skb_list_core+0x2b1/0x5c0 [ 74.079923][ T8914] netif_receive_skb_list_internal+0x5c7/0x810 [ 74.086235][ T8914] gro_normal_list.part.0+0x37/0xa0 [ 74.091593][ T8914] gro_normal_one+0x14c/0x160 [ 74.096258][ T8914] napi_gro_receive+0x27d/0x2f0 [ 74.101172][ T8914] receive_buf+0x24c/0x3420 [ 74.105650][ T8914] virtnet_poll+0x343/0x790 [ 74.110151][ T8914] net_rx_action+0x3ad/0xac0 [ 74.114716][ T8914] __do_softirq+0x118/0x34a [ 74.119193][ T8914] run_ksoftirqd+0x41/0x60 [ 74.123598][ T8914] smpboot_thread_fn+0x374/0x4a0 [ 74.128509][ T8914] kthread+0x203/0x230 [ 74.132744][ T8914] ret_from_fork+0x1f/0x30 [ 74.137136][ T8914] [ 74.143358][ T8914] read to 0xffffffff88ae9140 of 8 bytes by task 8914 on cpu 0: [ 74.151225][ T8914] ktime_get_seconds+0x42/0x60 [ 74.155975][ T8914] tcp_rcv_established+0xe79/0xee0 [ 74.161792][ T8914] tcp_v4_do_rcv+0x396/0x4f0 [ 74.166364][ T8914] __release_sock+0x130/0x1e0 [ 74.171114][ T8914] release_sock+0x5e/0x160 [ 74.175524][ T8914] tcp_recvmsg+0x68e/0x1ba0 [ 74.180003][ T8914] inet_recvmsg+0xc1/0x250 [ 74.184477][ T8914] sock_recvmsg+0x8e/0xb0 [ 74.188806][ T8914] sock_read_iter+0x185/0x230 [ 74.193475][ T8914] new_sync_read+0x416/0x450 [ 74.198044][ T8914] __vfs_read+0x9e/0xb0 [ 74.202178][ T8914] vfs_read+0x13e/0x2b0 [ 74.206375][ T8914] ksys_read+0x16a/0x1a0 [ 74.210600][ T8914] __x64_sys_read+0x49/0x60 [ 74.215094][ T8914] do_syscall_64+0xc7/0x3b0 [ 74.219706][ T8914] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 74.225677][ T8914] [ 74.227985][ T8914] Reported by Kernel Concurrency Sanitizer on: [ 74.234222][ T8914] CPU: 0 PID: 8914 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 74.242978][ T8914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.253022][ T8914] ================================================================== [ 74.261087][ T8914] Kernel panic - not syncing: panic_on_warn set ... [ 74.267743][ T8914] CPU: 0 PID: 8914 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 74.275963][ T8914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.286004][ T8914] Call Trace: [ 74.289306][ T8914] dump_stack+0x11d/0x187 [ 74.294263][ T8914] panic+0x210/0x640 [ 74.298931][ T8914] ? vprintk_func+0x89/0x13a [ 74.303592][ T8914] kcsan_report.cold+0xc/0x1a [ 74.308600][ T8914] kcsan_setup_watchpoint+0x3fb/0x440 [ 74.313950][ T8914] ktime_get_seconds+0x42/0x60 [ 74.318691][ T8914] tcp_rcv_established+0xe79/0xee0 [ 74.323858][ T8914] tcp_v4_do_rcv+0x396/0x4f0 [ 74.328464][ T8914] __release_sock+0x130/0x1e0 [ 74.333138][ T8914] release_sock+0x5e/0x160 [ 74.337530][ T8914] tcp_recvmsg+0x68e/0x1ba0 [ 74.342031][ T8914] inet_recvmsg+0xc1/0x250 [ 74.346457][ T8914] ? apparmor_socket_recvmsg+0x38/0x40 [ 74.351910][ T8914] ? inet_sendpage+0xf0/0xf0 [ 74.356482][ T8914] sock_recvmsg+0x8e/0xb0 [ 74.360879][ T8914] sock_read_iter+0x185/0x230 [ 74.365544][ T8914] new_sync_read+0x416/0x450 [ 74.370205][ T8914] __vfs_read+0x9e/0xb0 [ 74.374603][ T8914] vfs_read+0x13e/0x2b0 [ 74.378738][ T8914] ksys_read+0x16a/0x1a0 [ 74.382967][ T8914] __x64_sys_read+0x49/0x60 [ 74.387449][ T8914] do_syscall_64+0xc7/0x3b0 [ 74.391932][ T8914] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 74.397914][ T8914] RIP: 0033:0x4b3cdb [ 74.401806][ T8914] 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 [ 74.423703][ T8914] RSP: 002b:000000c000311890 EFLAGS: 00000206 ORIG_RAX: 0000000000000000 [ 74.432503][ T8914] RAX: ffffffffffffffda RBX: 000000c00002c000 RCX: 00000000004b3cdb [ 74.440553][ T8914] RDX: 0000000000001000 RSI: 000000c0002d6000 RDI: 0000000000000006 [ 74.448692][ T8914] RBP: 000000c0003118e0 R08: 0000000000000001 R09: 0000000000000002 [ 74.456658][ T8914] R10: 0000000000002ec4 R11: 0000000000000206 R12: 0000000000003418 [ 74.464655][ T8914] R13: 0000000000000200 R14: 0000000000000008 R15: 0000000000000004 [ 74.473329][ T8914] Kernel Offset: disabled [ 74.477661][ T8914] Rebooting in 86400 seconds..