INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added 'ci-upstream-mmots-kasan-gce-4,10.128.15.217' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz2.accept_dad = 0 net.ipv6.conf.syz6.accept_dad = 0 net.ipv6.conf.syz3.accept_dad = 0 net.ipv6.conf.syz1.accept_dad = 0 net.ipv6.conf.syz5.accept_dad = 0 net.ipv6.conf.syz7.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 net.ipv6.conf.syz4.accept_dad = 0 net.ipv6.conf.syz6.router_solicitations = 0 net.ipv6.conf.syz3.router_solicitations = 0 net.ipv6.conf.syz1.router_solicitations = 0 net.ipv6.conf.syz5.router_solicitations = 0 net.ipv6.conf.syz2.router_solicitations = 0 net.ipv6.conf.syz4.router_solicitations = 0 net.ipv6.conf.syz7.router_solicitations = 0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 99.610655] ------------[ cut here ]------------ [ 99.611440] WARNING: CPU: 1 PID: 24353 at kernel/futex.c:818 get_pi_state+0x15b/0x190 [ 99.612491] Kernel panic - not syncing: panic_on_warn set ... [ 99.612491] [ 99.613473] CPU: 1 PID: 24353 Comm: syzkaller121915 Not tainted 4.14.0-rc2-mm1+ #10 [ 99.614502] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 99.615727] Call Trace: [ 99.616095] dump_stack+0x194/0x257 [ 99.616598] ? arch_local_irq_restore+0x53/0x53 [ 99.617246] panic+0x1e4/0x417 [ 99.617689] ? __warn+0x1d9/0x1d9 [ 99.618160] ? show_regs_print_info+0x65/0x65 [ 99.618786] ? get_pi_state+0x15b/0x190 [ 99.619327] __warn+0x1c4/0x1d9 [ 99.619780] ? get_pi_state+0x15b/0x190 [ 99.620327] report_bug+0x211/0x2d0 [ 99.620832] fixup_bug+0x40/0x90 [ 99.621296] do_trap+0x260/0x390 [ 99.621770] do_error_trap+0x120/0x390 [ 99.622299] ? generic_exec_single+0x18a/0x5b0 [ 99.622920] ? do_trap+0x390/0x390 [ 99.623407] ? get_pi_state+0x15b/0x190 [ 99.623965] ? find_held_lock+0x39/0x1d0 [ 99.624532] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 99.625194] do_invalid_op+0x1b/0x20 [ 99.625700] invalid_op+0x18/0x20 [ 99.626172] RIP: 0010:get_pi_state+0x15b/0x190 [ 99.626787] RSP: 0018:ffff8801bf2a77a8 EFLAGS: 00010097 [ 99.627512] RAX: ffff8801cb2d05c0 RBX: 0000000000000000 RCX: 1ffff10037e54efa [ 99.628511] RDX: 0000000000000000 RSI: 0000000000000003 RDI: ffff8801d892cd40 [ 99.629481] RBP: ffff8801bf2a7838 R08: ffff8801cb2d1880 R09: 1ffff10037e54edf [ 99.630440] R10: ffff8801cb2d05c0 R11: 0000000000000002 R12: 1ffff10037e54ef6 [ 99.634064] R13: ffff8801d892cd40 R14: 1ffff10037e54efa R15: ffff8801d892ce00 [ 99.641333] ? get_pi_state+0x15b/0x190 [ 99.645281] ? futex_wait_queue_me+0x7e0/0x7e0 [ 99.649851] exit_pi_state_list+0x556/0x7a0 [ 99.654161] ? futex_wait_requeue_pi.constprop.19+0x1300/0x1300 [ 99.660196] ? lock_release+0xd70/0xd70 [ 99.664145] ? trace_event_raw_event_sched_switch+0x770/0x770 [ 99.670006] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 99.675093] ? __might_sleep+0x95/0x190 [ 99.679046] ? __might_fault+0x188/0x1d0 [ 99.683089] ? do_raw_spin_trylock+0x190/0x190 [ 99.687648] mm_release+0x46d/0x590 [ 99.691248] ? do_raw_spin_trylock+0x190/0x190 [ 99.695806] ? mm_access+0x140/0x140 [ 99.699492] ? _raw_spin_unlock_irq+0x27/0x70 [ 99.703963] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 99.708953] ? trace_hardirqs_on+0xd/0x10 [ 99.713076] ? _raw_spin_unlock_irq+0x27/0x70 [ 99.717545] ? acct_collect+0x637/0x800 [ 99.721498] do_exit+0x481/0x1b00 [ 99.724925] ? blk_init_request_from_bio+0x3d0/0x3d0 [ 99.730010] ? mm_update_next_owner+0x930/0x930 [ 99.734666] ? lock_downgrade+0x990/0x990 [ 99.738795] ? lock_release+0xd70/0xd70 [ 99.742741] ? trace_event_raw_event_sched_switch+0x770/0x770 [ 99.748598] ? blk_start_plug+0xbb/0x370 [ 99.752634] ? rcu_note_context_switch+0x710/0x710 [ 99.757536] ? blk_lld_busy+0x60/0x60 [ 99.761321] ? vmacache_find+0x5f/0x280 [ 99.765269] ? vmacache_update+0xfe/0x130 [ 99.769393] ? find_vma+0x30/0x150 [ 99.772914] ? up_read+0x1a/0x40 [ 99.776255] ? SyS_madvise+0x654/0x13d0 [ 99.780206] ? __might_sleep+0x95/0x190 [ 99.784169] ? madvise_free_pte_range+0x1ea0/0x1ea0 [ 99.789161] ? SyS_futex+0x269/0x390 [ 99.792855] ? do_futex+0x20d0/0x20d0 [ 99.796635] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 99.801453] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 99.806445] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 99.811181] SyS_exit+0x22/0x30 [ 99.814435] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 99.819164] RIP: 0033:0x40337e [ 99.822326] RSP: 002b:00007fdd99af2d20 EFLAGS: 00000246 ORIG_RAX: 000000000000003c [ 99.830010] RAX: ffffffffffffffda RBX: 00007fdd99af3700 RCX: 000000000040337e [ 99.837254] RDX: 000000000000003c RSI: 00000000007fb000 RDI: 0000000000000000 [ 99.844496] RBP: 0000000000000086 R08: 0000000020048000 R09: 0000000000000000 [ 99.851739] R10: 000000002000b000 R11: 0000000000000246 R12: 0000000000000000 [ 99.858983] R13: 00007ffcfc38d0bf R14: 00007fdd99af39c0 R15: 0000000000000000