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-5,10.128.0.23' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 net.ipv6.conf.syz5.accept_dad = 0 net.ipv6.conf.syz7.accept_dad = 0 net.ipv6.conf.syz7.router_solicitations = 0 net.ipv6.conf.syz5.router_solicitations = 0 net.ipv6.conf.syz6.accept_dad = 0 net.ipv6.conf.syz6.router_solicitations = 0 executing program net.ipv6.conf.syz3.accept_dad = 0 net.ipv6.conf.syz4.accept_dad = 0 net.ipv6.conf.syz1.accept_dad = 0 net.ipv6.conf.syz4.router_solicitations = 0 net.ipv6.conf.syz3.router_solicitations = 0 net.ipv6.conf.syz2.accept_dad = 0 net.ipv6.conf.syz2.router_solicitations = 0 net.ipv6.conf.syz1.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 syzkaller login: [ 44.806940] ------------[ cut here ]------------ [ 44.807743] WARNING: CPU: 1 PID: 6152 at kernel/futex.c:818 get_pi_state+0x15b/0x190 [ 44.808808] Kernel panic - not syncing: panic_on_warn set ... [ 44.808808] [ 44.809811] CPU: 1 PID: 6152 Comm: syzkaller882345 Not tainted 4.14.0-rc2-mm1+ #11 [ 44.810826] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.812095] Call Trace: [ 44.812480] dump_stack+0x194/0x257 [ 44.812994] ? arch_local_irq_restore+0x53/0x53 [ 44.813652] panic+0x1e4/0x41c [ 44.814093] ? refcount_error_report+0x214/0x214 [ 44.814748] ? show_regs_print_info+0x65/0x65 [ 44.815374] ? get_pi_state+0x15b/0x190 [ 44.815912] __warn+0x1c4/0x1e0 [ 44.816364] ? get_pi_state+0x15b/0x190 [ 44.816908] report_bug+0x211/0x2d0 [ 44.817412] fixup_bug+0x40/0x90 [ 44.817875] do_trap+0x260/0x390 [ 44.818360] do_error_trap+0x120/0x390 [ 44.818888] ? generic_exec_single+0x18a/0x5b0 [ 44.819511] ? do_trap+0x390/0x390 [ 44.820013] ? get_pi_state+0x15b/0x190 [ 44.820551] ? find_held_lock+0x39/0x1d0 [ 44.821118] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 44.821780] do_invalid_op+0x1b/0x20 [ 44.822286] invalid_op+0x18/0x20 [ 44.822759] RIP: 0010:get_pi_state+0x15b/0x190 [ 44.823432] RSP: 0018:ffff8801c5f4f7a8 EFLAGS: 00010097 [ 44.824157] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 1ffff10038be9efa [ 44.825116] RDX: ffff8801c813c080 RSI: 0000000000000003 RDI: ffff8801c5f68d00 [ 44.826074] RBP: ffff8801c5f4f838 R08: ffff8801c813d340 R09: 1ffff10038be9edf [ 44.827032] R10: ffff8801c813c080 R11: 0000000000000002 R12: 1ffff10038be9ef6 [ 44.834070] R13: ffff8801c5f68d00 R14: 1ffff10038be9efa R15: ffff8801c5f68dc0 [ 44.841339] ? get_pi_state+0x15b/0x190 [ 44.845286] ? futex_wait_queue_me+0x7e0/0x7e0 [ 44.849859] exit_pi_state_list+0x556/0x7a0 [ 44.854167] ? futex_wait_requeue_pi.constprop.19+0x1300/0x1300 [ 44.860203] ? lock_release+0xd70/0xd70 [ 44.864153] ? trace_event_raw_event_sched_switch+0x770/0x770 [ 44.870010] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 44.875099] ? __might_sleep+0x95/0x190 [ 44.879052] ? __might_fault+0x188/0x1d0 [ 44.883096] ? do_raw_spin_trylock+0x190/0x190 [ 44.887655] mm_release+0x46d/0x590 [ 44.891253] ? do_raw_spin_trylock+0x190/0x190 [ 44.895807] ? mm_access+0x140/0x140 [ 44.899493] ? _raw_spin_unlock_irq+0x27/0x70 [ 44.903966] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 44.908956] ? trace_hardirqs_on+0xd/0x10 [ 44.913078] ? _raw_spin_unlock_irq+0x27/0x70 [ 44.917546] ? acct_collect+0x637/0x800 [ 44.921506] do_exit+0x481/0x1b00 [ 44.924930] ? blk_init_request_from_bio+0x3d0/0x3d0 [ 44.930014] ? mm_update_next_owner+0x930/0x930 [ 44.934683] ? lock_downgrade+0x990/0x990 [ 44.938809] ? lock_release+0xd70/0xd70 [ 44.942759] ? trace_event_raw_event_sched_switch+0x770/0x770 [ 44.948618] ? blk_start_plug+0xbb/0x370 [ 44.952653] ? rcu_note_context_switch+0x710/0x710 [ 44.957555] ? blk_lld_busy+0x60/0x60 [ 44.961340] ? vmacache_find+0x5f/0x280 [ 44.965286] ? vmacache_update+0xfe/0x130 [ 44.969410] ? find_vma+0x30/0x150 [ 44.972933] ? up_read+0x1a/0x40 [ 44.976274] ? SyS_madvise+0x654/0x13d0 [ 44.980223] ? __might_sleep+0x95/0x190 [ 44.984186] ? madvise_free_pte_range+0x1ea0/0x1ea0 [ 44.989180] ? SyS_futex+0x269/0x390 [ 44.992875] ? do_futex+0x20d0/0x20d0 [ 44.996653] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 45.001475] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 45.006467] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 45.011207] SyS_exit+0x22/0x30 [ 45.014461] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 45.019187] RIP: 0033:0x40396e [ 45.022351] RSP: 002b:00007fbff1e2ed20 EFLAGS: 00000246 ORIG_RAX: 000000000000003c [ 45.030033] RAX: ffffffffffffffda RBX: 00007fbff1e2f700 RCX: 000000000040396e [ 45.037273] RDX: 000000000000003c RSI: 00000000007fb000 RDI: 0000000000000000 [ 45.044614] RBP: 0000000000000086 R08: 0000000020048000 R09: 0000000000000000 [ 45.051855] R10: 000000002000b000 R11: 0000000000000246 R12: 0000000000000000 [ 45.059097] R13: 00000000007ef85f R14: 00007fbff1e2f9c0 R15: 0000000000000000