[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.28' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 31.395280] IPVS: ftp: loaded support on port[0] = 21 [ 31.464881] kasan: CONFIG_KASAN_INLINE enabled [ 31.469754] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 31.477224] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 31.483428] Modules linked in: [ 31.486598] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.14.240-syzkaller #0 [ 31.493678] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.503013] task: ffff8880b5464340 task.stack: ffff8880b5470000 [ 31.509080] RIP: 0010:__lock_acquire+0x1cc/0x3f20 [ 31.513979] RSP: 0018:ffff8880ba507b98 EFLAGS: 00010006 [ 31.519315] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 31.526591] RDX: 0000000000000003 RSI: 0000000000000000 RDI: 0000000000000018 [ 31.533936] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 [ 31.541285] R10: 0000000000000001 R11: ffff8880b5464340 R12: 0000000000000018 [ 31.548724] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8bebdd40 [ 31.556153] FS: 0000000000000000(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 [ 31.564409] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 31.570279] CR2: 00000000004bb218 CR3: 0000000008e6a000 CR4: 00000000001406e0 [ 31.577626] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 31.584924] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 31.592319] Call Trace: [ 31.594954] [ 31.597094] ? __lock_acquire+0x5fc/0x3f20 [ 31.601301] ? trace_hardirqs_on+0x10/0x10 [ 31.605582] ? start_secondary+0x4db/0x670 [ 31.609966] ? secondary_startup_64+0xa5/0xb0 [ 31.614628] ? lock_acquire+0x170/0x3f0 [ 31.618621] ? debug_object_deactivate+0x1da/0x2e0 [ 31.623544] ? trace_hardirqs_on+0x10/0x10 [ 31.627780] ? lock_acquire+0x170/0x3f0 [ 31.631729] ? lock_downgrade+0x740/0x740 [ 31.635854] lock_acquire+0x170/0x3f0 [ 31.640201] ? ip6_dst_destroy+0x108/0x390 [ 31.644517] _raw_spin_lock_bh+0x2f/0x40 [ 31.648552] ? ip6_dst_destroy+0x108/0x390 [ 31.653052] ip6_dst_destroy+0x108/0x390 [ 31.657135] ? percpu_counter_add_batch+0xf8/0x160 [ 31.662059] ? ip6_route_dev_notify+0xa80/0xa80 [ 31.667518] dst_destroy+0xc0/0x390 [ 31.671123] ? dst_destroy+0x390/0x390 [ 31.675011] rcu_process_callbacks+0x780/0x1180 [ 31.679678] ? note_gp_changes+0x2f0/0x2f0 [ 31.683919] ? sched_clock+0x2a/0x40 [ 31.688312] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 31.693749] __do_softirq+0x24d/0x9ff [ 31.697560] ? check_preemption_disabled+0x35/0x240 [ 31.702648] irq_exit+0x193/0x240 [ 31.706099] smp_apic_timer_interrupt+0x141/0x5e0 [ 31.711007] apic_timer_interrupt+0x93/0xa0 [ 31.715391] [ 31.717610] RIP: 0010:native_safe_halt+0xe/0x10 [ 31.722251] RSP: 0018:ffff8880b5477e68 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 31.729933] RAX: 1ffffffff11e125c RBX: dffffc0000000000 RCX: 0000000000000000 [ 31.737181] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff8880b5464bc4 [ 31.744714] RBP: ffffffff88f092d0 R08: 0000000000000000 R09: 0000000000000000 [ 31.752154] R10: 0000000000000000 R11: 0000000000000000 R12: ffffed1016a8c868 [ 31.759578] R13: ffff8880b5464340 R14: 0000000000000000 R15: 0000000000000000 [ 31.767035] default_idle+0x47/0x370 [ 31.770728] do_idle+0x250/0x3c0 [ 31.774072] cpu_startup_entry+0x14/0x20 [ 31.778127] start_secondary+0x4db/0x670 [ 31.782210] ? set_cpu_sibling_map+0x1680/0x1680 [ 31.786971] secondary_startup_64+0xa5/0xb0 [ 31.791283] Code: 18 00 00 00 00 48 81 c4 80 01 00 00 44 89 e8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 67 2a 00 00 49 81 3c 24 a0 97 2e 8b 0f 84 5f [ 31.810419] RIP: __lock_acquire+0x1cc/0x3f20 RSP: ffff8880ba507b98 [ 31.816736] ---[ end trace d78507bdbdd801a2 ]--- [ 31.821465] Kernel panic - not syncing: Fatal exception in interrupt [ 31.829293] Kernel Offset: disabled [ 31.832925] Rebooting in 86400 seconds..