[[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 '10.128.0.5' (ECDSA) to the list of known hosts.
2021/03/12 00:20:52 fuzzer started
2021/03/12 00:20:52 dialing manager at 10.128.0.163:43627
2021/03/12 00:20:52 syscalls: 3557
2021/03/12 00:20:52 code coverage: enabled
2021/03/12 00:20:52 comparison tracing: enabled
2021/03/12 00:20:52 extra coverage: enabled
2021/03/12 00:20:52 setuid sandbox: enabled
2021/03/12 00:20:52 namespace sandbox: enabled
2021/03/12 00:20:52 Android sandbox: /sys/fs/selinux/policy does not exist
2021/03/12 00:20:52 fault injection: enabled
2021/03/12 00:20:52 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2021/03/12 00:20:52 net packet injection: enabled
2021/03/12 00:20:52 net device setup: enabled
2021/03/12 00:20:52 concurrency sanitizer: enabled
2021/03/12 00:20:52 devlink PCI setup: PCI device 0000:00:10.0 is not available
2021/03/12 00:20:52 USB emulation: enabled
2021/03/12 00:20:52 hci packet injection: enabled
2021/03/12 00:20:52 wifi device emulation: enabled
2021/03/12 00:20:52 802.15.4 emulation: enabled
2021/03/12 00:20:56 suppressing KCSAN reports in functions: 'ext4_mb_good_group' 'do_sys_poll' 'wbt_done' 'audit_log_start' 'blk_mq_rq_ctx_init' '__ext4_update_other_inode_time' 'ext4_writepages' 'kauditd_thread' 'do_select' 'jbd2_journal_stop' 'mark_buffer_dirty_inode' 'wg_packet_decrypt_worker' '__mark_inode_dirty' 'prandom_seed' 'blk_mq_sched_dispatch_requests' 'pcpu_alloc' 'start_this_handle' 'complete_signal' 'pipe_release' '_prb_read_valid' 'futex_wait_queue_me' 'ext4_ind_map_blocks' 'ext4_mb_find_by_goal' '__ext4_new_inode' 'ext4_mb_regular_allocator' 'jbd2_journal_commit_transaction' 'n_tty_receive_buf_common' 'ext4_fc_commit' 'do_signal_stop' '__delete_from_page_cache' 'tick_nohz_next_event' 'btrfs_wait_block_group_cache_progress' 'ext4_free_inodes_count' 'alloc_pid' 'generic_write_end' 'dd_has_work' 'shmem_mknod' 'kvm_mmu_notifier_invalidate_range_end' 'wbt_issue' '__xa_clear_mark' 'jbd2_journal_dirty_metadata' '__filemap_fdatawrite_range' 'xas_find_marked' 'expire_timers' 'blk_mq_dispatch_rq_list' '__ext4_handle_dirty_metadata' 'do_nanosleep' 'ext4_mark_iloc_dirty' '__add_to_page_cache_locked' 'iptunnel_xmit' 'blk_mq_request_bypass_insert'
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syzkaller login: [ 56.476863][ C0] ==================================================================
[ 56.484979][ C0] BUG: KCSAN: data-race in __mod_timer / timer_clear_idle
[ 56.492110][ C0]
[ 56.494424][ C0] write to 0xffff88813bd1b925 of 1 bytes by task 0 on cpu 1:
[ 56.501953][ C0] timer_clear_idle+0x1e/0x30
[ 56.506628][ C0] __tick_nohz_idle_restart_tick+0x20/0x180
[ 56.512933][ C0] tick_nohz_idle_exit+0x104/0x220
[ 56.518021][ C0] do_idle+0x1f6/0x230
[ 56.522080][ C0] cpu_startup_entry+0x15/0x20
[ 56.526823][ C0] secondary_startup_64_no_verify+0xb0/0xbb
[ 56.532695][ C0]
[ 56.535024][ C0] read to 0xffff88813bd1b925 of 1 bytes by interrupt on cpu 0:
[ 56.542567][ C0] __mod_timer+0x8c5/0xc10
[ 56.546961][ C0] mod_timer+0x1b/0x20
[ 56.551010][ C0] sk_reset_timer+0x1f/0xa0
[ 56.555489][ C0] tcp_send_delayed_ack+0x23e/0x250
[ 56.560749][ C0] __tcp_ack_snd_check+0x2f9/0x510
[ 56.565835][ C0] tcp_rcv_established+0x11f0/0x1330
[ 56.571106][ C0] tcp_v4_do_rcv+0x278/0x4a0
[ 56.575670][ C0] tcp_v4_rcv+0x219f/0x2420
[ 56.580147][ C0] ip_protocol_deliver_rcu+0x1f9/0x3e0
[ 56.585668][ C0] ip_local_deliver+0x1d6/0x2a0
[ 56.590591][ C0] ip_sublist_rcv+0x4c4/0x590
[ 56.595257][ C0] ip_list_rcv+0x262/0x290
[ 56.599646][ C0] __netif_receive_skb_list_core+0x34b/0x450
[ 56.605604][ C0] __netif_receive_skb_list+0x262/0x2e0
[ 56.611128][ C0] netif_receive_skb_list_internal+0xda/0x330
[ 56.617171][ C0] napi_complete_done+0x1b2/0x4d0
[ 56.622173][ C0] virtqueue_napi_complete+0x28/0x80
[ 56.627447][ C0] virtnet_poll+0x65f/0x790
[ 56.631929][ C0] __napi_poll+0x77/0x510
[ 56.636253][ C0] net_rx_action+0x29f/0x680
[ 56.640833][ C0] __do_softirq+0x13c/0x2c3
[ 56.645315][ C0] __irq_exit_rcu+0xb4/0xc0
[ 56.649796][ C0] common_interrupt+0x80/0x90
[ 56.654461][ C0] asm_common_interrupt+0x1e/0x40
[ 56.659464][ C0] acpi_idle_enter+0x25b/0x2e0
[ 56.664208][ C0] cpuidle_enter_state+0x2b6/0x7c0
[ 56.669301][ C0] cpuidle_enter+0x3c/0x60
[ 56.673693][ C0] do_idle+0x193/0x230
[ 56.677740][ C0] cpu_startup_entry+0x15/0x20
[ 56.682484][ C0] rest_init+0xd7/0xe0
[ 56.686535][ C0] arch_call_rest_init+0xa/0xb
[ 56.691284][ C0] start_kernel+0x5a1/0x626
[ 56.695788][ C0] secondary_startup_64_no_verify+0xb0/0xbb
[ 56.701660][ C0]
[ 56.704068][ C0] Reported by Kernel Concurrency Sanitizer on:
[ 56.710195][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.12.0-rc2-syzkaller #0
[ 56.718244][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 56.728559][ C0] ==================================================================
[ 56.736813][ C0] Kernel panic - not syncing: panic_on_warn set ...
[ 56.743380][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.12.0-rc2-syzkaller #0
[ 56.751334][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 56.761377][ C0] Call Trace:
[ 56.764638][ C0]
[ 56.767461][ C0] dump_stack+0x137/0x19d
[ 56.771781][ C0] panic+0x1e7/0x5fa
[ 56.775742][ C0] ? vprintk_emit+0x2fa/0x3e0
[ 56.780421][ C0] kcsan_report+0x67b/0x680
[ 56.784907][ C0] ? kcsan_setup_watchpoint+0x40b/0x470
[ 56.790559][ C0] ? __mod_timer+0x8c5/0xc10
[ 56.795146][ C0] ? mod_timer+0x1b/0x20
[ 56.799380][ C0] ? sk_reset_timer+0x1f/0xa0
[ 56.804040][ C0] ? tcp_send_delayed_ack+0x23e/0x250
[ 56.809395][ C0] ? __tcp_ack_snd_check+0x2f9/0x510
[ 56.814660][ C0] ? tcp_rcv_established+0x11f0/0x1330
[ 56.820099][ C0] ? tcp_v4_do_rcv+0x278/0x4a0
[ 56.824850][ C0] ? tcp_v4_rcv+0x219f/0x2420
[ 56.829524][ C0] ? ip_protocol_deliver_rcu+0x1f9/0x3e0
[ 56.835247][ C0] ? ip_local_deliver+0x1d6/0x2a0
[ 56.840256][ C0] ? ip_sublist_rcv+0x4c4/0x590
[ 56.845085][ C0] ? ip_list_rcv+0x262/0x290
[ 56.849767][ C0] ? __netif_receive_skb_list_core+0x34b/0x450
[ 56.855916][ C0] ? __netif_receive_skb_list+0x262/0x2e0
[ 56.861619][ C0] ? netif_receive_skb_list_internal+0xda/0x330
[ 56.867842][ C0] ? napi_complete_done+0x1b2/0x4d0
[ 56.873019][ C0] ? virtqueue_napi_complete+0x28/0x80
[ 56.878457][ C0] ? virtnet_poll+0x65f/0x790
[ 56.883112][ C0] ? __napi_poll+0x77/0x510
[ 56.887592][ C0] ? net_rx_action+0x29f/0x680
[ 56.892347][ C0] ? __do_softirq+0x13c/0x2c3
[ 56.897111][ C0] ? __irq_exit_rcu+0xb4/0xc0
[ 56.901861][ C0] ? common_interrupt+0x80/0x90
[ 56.906696][ C0] ? asm_common_interrupt+0x1e/0x40
[ 56.911901][ C0] ? acpi_idle_enter+0x25b/0x2e0
[ 56.916881][ C0] ? cpuidle_enter_state+0x2b6/0x7c0
[ 56.922171][ C0] ? cpuidle_enter+0x3c/0x60
[ 56.926741][ C0] ? do_idle+0x193/0x230
[ 56.930974][ C0] ? cpu_startup_entry+0x15/0x20
[ 56.935907][ C0] ? rest_init+0xd7/0xe0
[ 56.940143][ C0] ? arch_call_rest_init+0xa/0xb
[ 56.945077][ C0] ? start_kernel+0x5a1/0x626
[ 56.949746][ C0] ? secondary_startup_64_no_verify+0xb0/0xbb
[ 56.955803][ C0] ? vdso_join_timens+0xc3/0xf0
[ 56.960634][ C0] ? kvm_sched_clock_read+0x15/0x40
[ 56.965809][ C0] kcsan_setup_watchpoint+0x40b/0x470
[ 56.971182][ C0] __mod_timer+0x8c5/0xc10
[ 56.975582][ C0] mod_timer+0x1b/0x20
[ 56.979643][ C0] sk_reset_timer+0x1f/0xa0
[ 56.984139][ C0] tcp_send_delayed_ack+0x23e/0x250
[ 56.989329][ C0] __tcp_ack_snd_check+0x2f9/0x510
[ 56.994683][ C0] tcp_rcv_established+0x11f0/0x1330
[ 57.000222][ C0] tcp_v4_do_rcv+0x278/0x4a0
[ 57.004797][ C0] tcp_v4_rcv+0x219f/0x2420
[ 57.009303][ C0] ip_protocol_deliver_rcu+0x1f9/0x3e0
[ 57.014752][ C0] ip_local_deliver+0x1d6/0x2a0
[ 57.019578][ C0] ? ip_local_deliver+0x2a0/0x2a0
[ 57.024593][ C0] ip_sublist_rcv+0x4c4/0x590
[ 57.029249][ C0] ? ip_rcv_core+0x590/0x590
[ 57.033815][ C0] ip_list_rcv+0x262/0x290
[ 57.038210][ C0] ? ip_rcv_finish+0x160/0x160
[ 57.042951][ C0] __netif_receive_skb_list_core+0x34b/0x450
[ 57.048927][ C0] ? dev_gro_receive+0x995/0xef0
[ 57.053870][ C0] __netif_receive_skb_list+0x262/0x2e0
[ 57.059485][ C0] netif_receive_skb_list_internal+0xda/0x330
[ 57.065546][ C0] ? napi_gro_receive+0x330/0x4a0
[ 57.070550][ C0] napi_complete_done+0x1b2/0x4d0
[ 57.075564][ C0] virtqueue_napi_complete+0x28/0x80
[ 57.080979][ C0] virtnet_poll+0x65f/0x790
[ 57.085464][ C0] __napi_poll+0x77/0x510
[ 57.089785][ C0] net_rx_action+0x29f/0x680
[ 57.094356][ C0] __do_softirq+0x13c/0x2c3
[ 57.098840][ C0] __irq_exit_rcu+0xb4/0xc0
[ 57.103337][ C0] common_interrupt+0x80/0x90
[ 57.108006][ C0]
[ 57.110915][ C0] asm_common_interrupt+0x1e/0x40
[ 57.115970][ C0] RIP: 0010:acpi_idle_enter+0x25b/0x2e0
[ 57.121522][ C0] Code: 48 8b 1b 48 89 de 48 83 e6 08 31 ff e8 ae df 87 fe 48 83 e3 08 75 63 e9 0c 00 00 00 e8 ee da 87 fe 0f 00 2d 91 0f 41 03 fb f4 eb 59 49 8d 7c 24 04 e8 08 6c 98 fe 41 8b 54 24 04 ec 48 c7 c7
[ 57.142191][ C0] RSP: 0018:ffffffff87603da0 EFLAGS: 00000246
[ 57.148239][ C0] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 57.156189][ C0] RDX: ffffffff87630780 RSI: 0000000000000000 RDI: 0000000000000000
[ 57.164498][ C0] RBP: 0000000000000001 R08: ffffffff82be4492 R09: ffffffff82be4453
[ 57.172465][ C0] R10: 0000000000000002 R11: ffffffff87630780 R12: ffff888140cfe064
[ 57.180420][ C0] R13: 0000000000000001 R14: 0000000000000001 R15: ffff88813bc00000
[ 57.188385][ C0] ? acpi_idle_enter+0x203/0x2e0
[ 57.193316][ C0] ? acpi_idle_enter+0x242/0x2e0
[ 57.198251][ C0] cpuidle_enter_state+0x2b6/0x7c0
[ 57.203371][ C0] cpuidle_enter+0x3c/0x60
[ 57.207773][ C0] do_idle+0x193/0x230
[ 57.211836][ C0] cpu_startup_entry+0x15/0x20
[ 57.216590][ C0] rest_init+0xd7/0xe0
[ 57.220640][ C0] ? time_init+0xc/0xc
[ 57.224690][ C0] arch_call_rest_init+0xa/0xb
[ 57.229436][ C0] start_kernel+0x5a1/0x626
[ 57.233921][ C0] secondary_startup_64_no_verify+0xb0/0xbb
[ 57.239873][ C0] Kernel Offset: disabled
[ 57.244204][ C0] Rebooting in 86400 seconds..