[[0;32m OK [0m] Reached target Login Prompts.
[[0;32m OK [0m] Reached target Multi-User System.
[[0;32m OK [0m] Reached target Graphical Interface.
Starting Update UTMP about System Runlevel Changes...
[[0;32m OK [0m] Started Update UTMP about System Runlevel Changes.
Debian GNU/Linux 9 syzkaller ttyS0
Warning: Permanently added '10.128.0.159' (ECDSA) to the list of known hosts.
2020/06/12 16:28:25 fuzzer started
2020/06/12 16:28:25 dialing manager at 10.128.0.105:35517
2020/06/12 16:28:26 syscalls: 3085
2020/06/12 16:28:26 code coverage: enabled
2020/06/12 16:28:26 comparison tracing: enabled
2020/06/12 16:28:26 extra coverage: enabled
2020/06/12 16:28:26 setuid sandbox: enabled
2020/06/12 16:28:26 namespace sandbox: enabled
2020/06/12 16:28:26 Android sandbox: /sys/fs/selinux/policy does not exist
2020/06/12 16:28:26 fault injection: enabled
2020/06/12 16:28:26 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/06/12 16:28:26 net packet injection: enabled
2020/06/12 16:28:26 net device setup: enabled
2020/06/12 16:28:26 concurrency sanitizer: enabled
2020/06/12 16:28:26 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/06/12 16:28:26 USB emulation: enabled
syzkaller login: [ 53.814549][ T8912] KCSAN: could not find function: '_find_next_bit'
2020/06/12 16:28:28 adding functions to KCSAN blacklist: 'xas_clear_mark' 'mod_timer' 'do_signal_stop' '_find_next_bit' 'copy_process' 'alloc_pid' '__ext4_new_inode' 'ep_poll' 'find_get_pages_range_tag' 'file_update_time' 'generic_write_end'
[ 56.826299][ C0] ==================================================================
[ 56.834446][ C0] BUG: KCSAN: data-race in tick_sched_do_timer / tick_sched_do_timer
[ 56.842611][ C0]
[ 56.844922][ C0] write to 0xffffffff8764e210 of 4 bytes by interrupt on cpu 1:
[ 56.852549][ C0] tick_sched_do_timer+0xb4/0xd0
[ 56.857483][ C0] tick_sched_timer+0x3f/0xd0
[ 56.862134][ C0] __hrtimer_run_queues+0x271/0x600
[ 56.867303][ C0] hrtimer_interrupt+0x226/0x490
[ 56.872213][ C0] smp_apic_timer_interrupt+0xd8/0x270
[ 56.877737][ C0] apic_timer_interrupt+0xf/0x20
[ 56.882648][ C0] ktime_get_with_offset+0x194/0x230
[ 56.887908][ C0] netif_receive_skb_list_internal+0x53b/0x810
[ 56.894228][ C0] gro_normal_list.part.0+0x37/0xa0
[ 56.899401][ C0] gro_normal_one+0x14c/0x160
[ 56.904073][ C0] napi_gro_receive+0x27d/0x2f0
[ 56.908897][ C0] receive_buf+0x24c/0x3420
[ 56.913383][ C0] virtnet_poll+0x343/0x790
[ 56.917859][ C0] net_rx_action+0x3ad/0xac0
[ 56.922453][ C0] __do_softirq+0x118/0x34a
[ 56.926942][ C0] run_ksoftirqd+0x41/0x60
[ 56.931337][ C0] smpboot_thread_fn+0x374/0x4a0
[ 56.936257][ C0] kthread+0x203/0x230
[ 56.940308][ C0] ret_from_fork+0x1f/0x30
[ 56.944708][ C0]
[ 56.947027][ C0] read to 0xffffffff8764e210 of 4 bytes by interrupt on cpu 0:
[ 56.954547][ C0] tick_sched_do_timer+0x2e/0xd0
[ 56.959680][ C0] tick_sched_timer+0x3f/0xd0
[ 56.964352][ C0] __hrtimer_run_queues+0x271/0x600
[ 56.969539][ C0] hrtimer_interrupt+0x226/0x490
[ 56.974470][ C0] smp_apic_timer_interrupt+0xd8/0x270
[ 56.979940][ C0] apic_timer_interrupt+0xf/0x20
[ 56.984857][ C0] write_comp_data+0x68/0x70
[ 56.989431][ C0] __sanitizer_cov_trace_switch+0x45/0x70
[ 56.995125][ C0] __read_once_size+0x20/0x100
[ 56.999865][ C0] tcp_grow_window.isra.0+0xa9/0x4f0
[ 57.005129][ C0] tcp_event_data_recv+0x65b/0x940
[ 57.010300][ C0] tcp_rcv_established+0xbb0/0xee0
[ 57.015383][ C0] tcp_v4_do_rcv+0x396/0x4f0
[ 57.019950][ C0] __release_sock+0x130/0x1e0
[ 57.024601][ C0] release_sock+0x5e/0x160
[ 57.028991][ C0] tcp_recvmsg+0x68e/0x1ba0
[ 57.033491][ C0] inet_recvmsg+0xc1/0x250
[ 57.037895][ C0] sock_recvmsg+0x8e/0xb0
[ 57.042199][ C0] sock_read_iter+0x185/0x230
[ 57.046856][ C0] new_sync_read+0x416/0x450
[ 57.051432][ C0] __vfs_read+0x9e/0xb0
[ 57.055562][ C0] vfs_read+0x13e/0x2b0
[ 57.059694][ C0] ksys_read+0x16a/0x1a0
[ 57.063908][ C0] __x64_sys_read+0x49/0x60
[ 57.068387][ C0] do_syscall_64+0xc7/0x3b0
[ 57.072867][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 57.078726][ C0]
[ 57.081026][ C0] Reported by Kernel Concurrency Sanitizer on:
[ 57.087160][ C0] CPU: 0 PID: 8913 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0
[ 57.095419][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 57.105451][ C0] ==================================================================
[ 57.113496][ C0] Kernel panic - not syncing: panic_on_warn set ...
[ 57.120061][ C0] CPU: 0 PID: 8913 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0
[ 57.128276][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 57.138303][ C0] Call Trace:
[ 57.141569][ C0]
[ 57.144416][ C0] dump_stack+0x11d/0x187
[ 57.148736][ C0] panic+0x210/0x640
[ 57.152620][ C0] ? vprintk_func+0x89/0x13a
[ 57.157198][ C0] kcsan_report.cold+0xc/0x1a
[ 57.161854][ C0] kcsan_setup_watchpoint+0x3fb/0x440
[ 57.167209][ C0] tick_sched_do_timer+0x2e/0xd0
[ 57.172122][ C0] tick_sched_timer+0x3f/0xd0
[ 57.176775][ C0] __hrtimer_run_queues+0x271/0x600
[ 57.181963][ C0] ? tick_sched_do_timer+0xd0/0xd0
[ 57.187063][ C0] hrtimer_interrupt+0x226/0x490
[ 57.191977][ C0] ? kvm_clock_read+0x14/0x30
[ 57.196653][ C0] smp_apic_timer_interrupt+0xd8/0x270
[ 57.202099][ C0] apic_timer_interrupt+0xf/0x20
[ 57.207005][ C0]
[ 57.209924][ C0] RIP: 0010:write_comp_data+0x68/0x70
[ 57.215287][ C0] Code: 00 00 4e 8d 14 dd 28 00 00 00 4d 39 d0 72 1b 49 83 c1 01 4a 89 7c 10 e0 4a 89 74 10 e8 4a 89 54 10 f0 4a 89 4c d8 20 4c 89 08 0f 1f 80 00 00 00 00 48 8b 0c 24 40 0f b6 d6 40 0f b6 f7 31 ff
[ 57.234976][ C0] RSP: 0018:ffffc90000e178d8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13
[ 57.243379][ C0] RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffffff851e5e40
[ 57.251416][ C0] RDX: 0000000000000004 RSI: 0000000000000004 RDI: 0000000000000005
[ 57.259372][ C0] RBP: ffffffff867b2b00 R08: ffff888129d18080 R09: 0000c90000e17938
[ 57.267319][ C0] R10: 0000888121aa26c6 R11: 0000c90000e1793b R12: 0000000000000004
[ 57.275465][ C0] R13: ffff8881222cd4d0 R14: 0000000000004100 R15: 00000000000fe7c0
[ 57.283448][ C0] ? __read_once_size+0x20/0x100
[ 57.288387][ C0] __sanitizer_cov_trace_switch+0x45/0x70
[ 57.294165][ C0] __read_once_size+0x20/0x100
[ 57.298912][ C0] tcp_grow_window.isra.0+0xa9/0x4f0
[ 57.304182][ C0] tcp_event_data_recv+0x65b/0x940
[ 57.309280][ C0] tcp_rcv_established+0xbb0/0xee0
[ 57.314384][ C0] tcp_v4_do_rcv+0x396/0x4f0
[ 57.319060][ C0] __release_sock+0x130/0x1e0
[ 57.323748][ C0] release_sock+0x5e/0x160
[ 57.328150][ C0] tcp_recvmsg+0x68e/0x1ba0
[ 57.332647][ C0] inet_recvmsg+0xc1/0x250
[ 57.337848][ C0] ? apparmor_socket_recvmsg+0x38/0x40
[ 57.343294][ C0] ? inet_sendpage+0xf0/0xf0
[ 57.347869][ C0] sock_recvmsg+0x8e/0xb0
[ 57.352181][ C0] sock_read_iter+0x185/0x230
[ 57.356847][ C0] new_sync_read+0x416/0x450
[ 57.361683][ C0] __vfs_read+0x9e/0xb0
[ 57.365816][ C0] vfs_read+0x13e/0x2b0
[ 57.369951][ C0] ksys_read+0x16a/0x1a0
[ 57.374180][ C0] __x64_sys_read+0x49/0x60
[ 57.378701][ C0] do_syscall_64+0xc7/0x3b0
[ 57.383187][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 57.389162][ C0] RIP: 0033:0x4b3cdb
[ 57.393214][ C0] 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
[ 57.412802][ C0] RSP: 002b:000000c0001bb890 EFLAGS: 00000206 ORIG_RAX: 0000000000000000
[ 57.421194][ C0] RAX: ffffffffffffffda RBX: 000000c00002e800 RCX: 00000000004b3cdb
[ 57.429246][ C0] RDX: 0000000000001000 RSI: 000000c0002dc000 RDI: 0000000000000006
[ 57.437197][ C0] RBP: 000000c0001bb8e0 R08: 0000000000000001 R09: 0000000000000002
[ 57.445143][ C0] R10: 0000000000006e96 R11: 0000000000000206 R12: 00000000000070b2
[ 57.453289][ C0] R13: 0000000000000100 R14: 0000000000000040 R15: 0000000000000040
[ 57.462827][ C0] Kernel Offset: disabled
[ 57.467148][ C0] Rebooting in 86400 seconds..