INIT: Entering runlevel: 2
[[36minfo[39;49m] Using makefile-style concurrent boot in runlevel 2.
[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
Debian GNU/Linux 7 syzkaller ttyS0
Warning: Permanently added '10.128.10.14' (ECDSA) to the list of known hosts.
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syzkaller login: [ 35.378129] ==================================================================
[ 35.385542] BUG: KMSAN: uninit-value in rcu_cblist_dequeue+0x1bb/0x290
[ 35.385566] CPU: 1 PID: 3564 Comm: sshd Not tainted 4.16.0+ #82
[ 35.398259] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 35.407608] Call Trace:
[ 35.410180]
[ 35.412336] dump_stack+0x185/0x1d0
[ 35.415961] ? rcu_cblist_dequeue+0x1bb/0x290
[ 35.420456] kmsan_report+0x142/0x240
[ 35.420471] __msan_warning_32+0x6c/0xb0
[ 35.420495] rcu_cblist_dequeue+0x1bb/0x290
[ 35.432631] ? put_filp+0x160/0x160
[ 35.436262] rcu_process_callbacks+0x17cf/0x2070
[ 35.441024] ? rcu_scheduler_starting+0xe0/0xe0
[ 35.445688] __do_softirq+0x56d/0x93d
[ 35.449485] irq_exit+0x202/0x240
[ 35.452937] exiting_irq+0xe/0x10
[ 35.456396] smp_apic_timer_interrupt+0x64/0x90
[ 35.456408] apic_timer_interrupt+0xf/0x20
[ 35.456425]
[ 35.467549] RIP: 0010:do_syscall_64+0x6b/0x430
[ 35.472121] RSP: 0018:ffff8801ad11fea0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff12
[ 35.479825] RAX: 0000000000000000 RBX: 00000000100801c1 RCX: ffff880000000000
[ 35.487088] RDX: ffff8801cc58ffd0 RSI: aaaaaaaaaaaab000 RDI: ffffea0000000000
[ 35.494352] RBP: ffff8801ad11ff48 R08: 0000000000000000 R09: 0000000000000000
[ 35.494359] R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000000e
[ 35.494367] R13: ffff8801aa6de198 R14: ffff8801ad11ffd0 R15: ffff8801aa6dd880
[ 35.494403] ? __set_current_blocked+0x520/0x520
[ 35.520902] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[ 35.526084] RIP: 0033:0x7fbb30e963e0
[ 35.529781] RSP: 002b:00007ffeb4739038 EFLAGS: 00000246 ORIG_RAX: 000000000000000e
[ 35.537488] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fbb30e963e0
[ 35.537495] RDX: 0000000000000000 RSI: 00007ffeb4739050 RDI: 0000000000000002
[ 35.537503] RBP: 00005564d6c12c88 R08: 00007ffeb4739110 R09: 0101010101010101
[ 35.537508] R10: 0000000000000008 R11: 0000000000000246 R12: 00005564d81e0b60
[ 35.537529] R13: 00005564d6c10fb4 R14: 0000000000000028 R15: 00005564d6c12ca0
[ 35.573804]
[ 35.573807] Uninit was stored to memory at:
[ 35.573824] kmsan_internal_chain_origin+0x12b/0x210
[ 35.573847] __msan_chain_origin+0x69/0xc0
[ 35.589060] rcu_cblist_dequeue+0x1e0/0x290
[ 35.593377] rcu_process_callbacks+0x15cd/0x2070
[ 35.598129] __do_softirq+0x56d/0x93d
[ 35.601915] Uninit was stored to memory at:
[ 35.606241] kmsan_internal_chain_origin+0x12b/0x210
[ 35.606251] __msan_chain_origin+0x69/0xc0
[ 35.606275] rcu_segcblist_enqueue+0x24c/0x2d0
[ 35.620154] __call_rcu+0x227/0xef0
[ 35.623779] call_rcu_sched+0x32/0x40
[ 35.627577] __fput+0x90e/0xa10
[ 35.630849] ____fput+0x37/0x40
[ 35.634133] task_work_run+0x243/0x2c0
[ 35.638030] do_exit+0x10e1/0x38d0
[ 35.638041] do_group_exit+0x1a0/0x360
[ 35.638052] get_signal+0x1320/0x1f20
[ 35.638076] do_signal+0xb8/0x1c80
[ 35.652767] prepare_exit_to_usermode+0x271/0x3a0
[ 35.657602] syscall_return_slowpath+0xe9/0x700
[ 35.662262] do_syscall_64+0x36d/0x430
[ 35.666143] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[ 35.671319] Uninit was stored to memory at:
[ 35.671333] kmsan_internal_chain_origin+0x12b/0x210
[ 35.671343] __msan_chain_origin+0x69/0xc0
[ 35.671367] search_extable+0xfb/0x110
[ 35.688880] search_exception_tables+0x8b/0x120
[ 35.693546] fixup_exception+0x84/0x190
[ 35.697520] math_error+0x44d/0x600
[ 35.701141] do_coprocessor_error+0x29/0x30
[ 35.705464] coprocessor_error+0x1b/0x40
[ 35.705475] fpu__drop+0x27f/0x4f0
[ 35.705498] exit_thread+0x168/0x1d0
[ 35.716750] do_exit+0x10f0/0x38d0
[ 35.720286] do_group_exit+0x1a0/0x360
[ 35.724166] SYSC_exit_group+0x21/0x30
[ 35.728046] SyS_exit_group+0x25/0x30
[ 35.731843] do_syscall_64+0x309/0x430
[ 35.735724] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[ 35.740905] Local variable description: ----key1.i@do_futex
[ 35.740907] Variable was created at:
[ 35.740922] do_futex+0x341/0x6ad0
[ 35.740931] SYSC_futex+0x3e1/0x810
[ 35.740948] Disabling lock debugging due to kernel taint
[ 35.762892] Kernel panic - not syncing: panic_on_warn set ...
[ 35.762892]
[ 35.770260] CPU: 1 PID: 3564 Comm: sshd Tainted: G B 4.16.0+ #82
[ 35.777613] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 35.777617] Call Trace:
[ 35.777622]
[ 35.777639] dump_stack+0x185/0x1d0
[ 35.777665] panic+0x39d/0x940
[ 35.798499] ? rcu_cblist_dequeue+0x1bb/0x290
[ 35.802992] kmsan_report+0x238/0x240
[ 35.806792] __msan_warning_32+0x6c/0xb0
[ 35.810853] rcu_cblist_dequeue+0x1bb/0x290
[ 35.815174] ? put_filp+0x160/0x160
[ 35.818800] rcu_process_callbacks+0x17cf/0x2070
[ 35.823564] ? rcu_scheduler_starting+0xe0/0xe0
[ 35.823577] __do_softirq+0x56d/0x93d
[ 35.823603] irq_exit+0x202/0x240
[ 35.835466] exiting_irq+0xe/0x10
[ 35.838923] smp_apic_timer_interrupt+0x64/0x90
[ 35.843592] apic_timer_interrupt+0xf/0x20
[ 35.847811]
[ 35.850046] RIP: 0010:do_syscall_64+0x6b/0x430
[ 35.854615] RSP: 0018:ffff8801ad11fea0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff12
[ 35.862324] RAX: 0000000000000000 RBX: 00000000100801c1 RCX: ffff880000000000
[ 35.862332] RDX: ffff8801cc58ffd0 RSI: aaaaaaaaaaaab000 RDI: ffffea0000000000
[ 35.862339] RBP: ffff8801ad11ff48 R08: 0000000000000000 R09: 0000000000000000
[ 35.862344] R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000000e
[ 35.862365] R13: ffff8801aa6de198 R14: ffff8801ad11ffd0 R15: ffff8801aa6dd880
[ 35.898662] ? __set_current_blocked+0x520/0x520
[ 35.903426] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[ 35.903449] RIP: 0033:0x7fbb30e963e0
[ 35.912307] RSP: 002b:00007ffeb4739038 EFLAGS: 00000246 ORIG_RAX: 000000000000000e
[ 35.920009] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fbb30e963e0
[ 35.927273] RDX: 0000000000000000 RSI: 00007ffeb4739050 RDI: 0000000000000002
[ 35.934538] RBP: 00005564d6c12c88 R08: 00007ffeb4739110 R09: 0101010101010101
[ 35.941808] R10: 0000000000000008 R11: 0000000000000246 R12: 00005564d81e0b60
[ 35.941815] R13: 00005564d6c10fb4 R14: 0000000000000028 R15: 00005564d6c12ca0
[ 35.949503] Dumping ftrace buffer:
[ 35.949507] (ftrace buffer empty)
[ 35.949510] Kernel Offset: disabled
[ 35.967526] Rebooting in 86400 seconds..