[[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 '10.128.0.28' (ECDSA) to the list of known hosts.
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syzkaller login: [ 298.644694][ C1] hrtimer: interrupt took 31311 ns
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[ 449.938738][ T27] INFO: task syz-executor891:6557 can't die for more than 143 seconds.
[ 449.947168][ T27] task:syz-executor891 state:R running task stack:27176 pid: 6557 ppid: 6541 flags:0x00004006
[ 449.958085][ T27] Call Trace:
[ 449.961455][ T27]
[ 449.964395][ T27] __schedule+0xa9a/0x4940
[ 449.969073][ T27] ? find_held_lock+0x2d/0x110
[ 449.973868][ T27] ? io_schedule_timeout+0x180/0x180
[ 449.979202][ T27] ? __cond_resched+0x13/0x20
[ 449.983894][ T27] preempt_schedule_common+0x45/0xc0
[ 449.989321][ T27] __cond_resched+0x13/0x20
[ 449.993832][ T27] inet_twsk_purge+0xed/0x7d0
[ 449.998586][ T27] ? inet_twsk_deschedule_put+0x50/0x50
[ 450.004146][ T27] ? iput+0x58/0x70
[ 450.007986][ T27] ? sock_release+0x15a/0x1b0
[ 450.012864][ T27] ? dccp_v4_reqsk_destructor+0x50/0x50
[ 450.018571][ T27] ? dccp_req_err+0x430/0x430
[ 450.023267][ T27] ops_exit_list+0x10d/0x160
[ 450.027890][ T27] setup_net+0x639/0xa30
[ 450.032175][ T27] ? ops_init+0x470/0x470
[ 450.036522][ T27] ? rcu_read_lock_sched_held+0x3a/0x70
[ 450.042226][ T27] copy_net_ns+0x318/0x760
[ 450.046686][ T27] create_new_namespaces+0x3f6/0xb20
[ 450.052262][ T27] unshare_nsproxy_namespaces+0xc1/0x1f0
[ 450.057925][ T27] ksys_unshare+0x445/0x920
[ 450.062598][ T27] ? unshare_fd+0x1c0/0x1c0
[ 450.067123][ T27] ? asm_sysvec_apic_timer_interrupt+0x12/0x20
[ 450.073421][ T27] ? trace_hardirqs_on+0x38/0x1c0
[ 450.078594][ T27] __x64_sys_unshare+0x2d/0x40
[ 450.083376][ T27] do_syscall_64+0x35/0xb0
[ 450.087836][ T27] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 450.093821][ T27] RIP: 0033:0x7f452bb29749
[ 450.098248][ T27] RSP: 002b:00007f452bad3318 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[ 450.106850][ T27] RAX: ffffffffffffffda RBX: 00007f452bbaa3c8 RCX: 00007f452bb29749
[ 450.114904][ T27] RDX: 00007f452bb29749 RSI: 00000000000f4240 RDI: 0000000040000000
[ 450.122961][ T27] RBP: 00007f452bbaa3c0 R08: 0000000000000000 R09: 0000000000000000
[ 450.131015][ T27] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f452bbaa3cc
[ 450.139067][ T27] R13: 00007ffdf2fc3e2f R14: 00007f452bad3400 R15: 0000000000022000
[ 450.147079][ T27]
executing program
[ 455.903619][ T27] INFO: task syz-executor891:6570 can't die for more than 149 seconds.
[ 455.912091][ T27] task:syz-executor891 state:R running task stack:27808 pid: 6570 ppid: 6541 flags:0x00004006
[ 455.922980][ T27] Call Trace:
[ 455.926267][ T27]
[ 455.929293][ T27] __schedule+0xa9a/0x4940
[ 455.933742][ T27] ? find_held_lock+0x2d/0x110
[ 455.938654][ T27] ? io_schedule_timeout+0x180/0x180
[ 455.944054][ T27] ? __cond_resched+0x13/0x20
[ 455.948782][ T27] preempt_schedule_common+0x45/0xc0
[ 455.954088][ T27] __cond_resched+0x13/0x20
[ 455.958675][ T27] inet_twsk_purge+0xed/0x7d0
[ 455.963380][ T27] ? inet_twsk_deschedule_put+0x50/0x50
[ 455.969384][ T27] ? iput+0x58/0x70
[ 455.973202][ T27] ? sock_release+0x15a/0x1b0
[ 455.977897][ T27] ? dccp_v4_reqsk_destructor+0x50/0x50
[ 455.983514][ T27] ? dccp_req_err+0x430/0x430
[ 455.988210][ T27] ops_exit_list+0x10d/0x160
[ 455.992879][ T27] setup_net+0x639/0xa30
[ 455.997156][ T27] ? ops_init+0x470/0x470
[ 456.001585][ T27] ? kasan_save_stack+0x40/0x50
[ 456.006538][ T27] copy_net_ns+0x318/0x760
[ 456.011032][ T27] create_new_namespaces+0x3f6/0xb20
[ 456.016356][ T27] unshare_nsproxy_namespaces+0xc1/0x1f0
[ 456.022078][ T27] ksys_unshare+0x445/0x920
[ 456.026597][ T27] ? unshare_fd+0x1c0/0x1c0
[ 456.031179][ T27] ? asm_sysvec_apic_timer_interrupt+0x12/0x20
[ 456.037352][ T27] ? trace_hardirqs_on+0x38/0x1c0
[ 456.042469][ T27] __x64_sys_unshare+0x2d/0x40
[ 456.047248][ T27] do_syscall_64+0x35/0xb0
[ 456.052064][ T27] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 456.058066][ T27] RIP: 0033:0x7f452bb29749
[ 456.062523][ T27] RSP: 002b:00007f452bab2318 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[ 456.070982][ T27] RAX: ffffffffffffffda RBX: 00007f452bbaa3d8 RCX: 00007f452bb29749
[ 456.078988][ T27] RDX: 00007f452bb29749 RSI: 0000000000000000 RDI: 0000000040000000
[ 456.086995][ T27] RBP: 00007f452bbaa3d0 R08: 0000000000000000 R09: 0000000000000000
[ 456.095119][ T27] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f452bbaa3dc
[ 456.103135][ T27] R13: 00007ffdf2fc3e2f R14: 00007f452bab2400 R15: 0000000000022000
[ 456.111184][ T27]
executing program