Warning: Permanently added '10.128.0.226' (ECDSA) to the list of known hosts.
2019/10/23 03:15:22 fuzzer started
syzkaller login: [   64.152696][ T1080] ------------[ cut here ]------------
[   64.158192][ T1080] WARNING: CPU: 0 PID: 1080 at mm/khugepaged.c:1643 collapse_file+0x1f9d/0x4170
[   64.169098][ T1080] Kernel panic - not syncing: panic_on_warn set ...
[   64.175678][ T1080] CPU: 0 PID: 1080 Comm: khugepaged Not tainted 5.4.0-rc4-next-20191022 #0
[   64.184259][ T1080] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   64.194310][ T1080] Call Trace:
[   64.197608][ T1080]  dump_stack+0x172/0x1f0
[   64.201946][ T1080]  ? collapse_file+0x1ef0/0x4170
[   64.206887][ T1080]  panic+0x2e3/0x75c
[   64.210781][ T1080]  ? add_taint.cold+0x16/0x16
[   64.215550][ T1080]  ? printk+0xba/0xed
[   64.219533][ T1080]  ? kmsg_dump_rewind_nolock+0xe4/0xe4
[   64.225001][ T1080]  ? __warn.cold+0x14/0x35
[   64.229414][ T1080]  ? __warn+0xd9/0x1d0
[   64.233489][ T1080]  ? collapse_file+0x1f9d/0x4170
[   64.238426][ T1080]  __warn.cold+0x2f/0x35
[   64.242670][ T1080]  ? report_bug.cold+0x63/0xb2
[   64.247436][ T1080]  ? collapse_file+0x1f9d/0x4170
[   64.252379][ T1080]  report_bug+0x289/0x300
[   64.256714][ T1080]  do_error_trap+0x11b/0x200
[   64.261305][ T1080]  do_invalid_op+0x37/0x50
[   64.265718][ T1080]  ? collapse_file+0x1f9d/0x4170
[   64.270682][ T1080]  invalid_op+0x23/0x30
[   64.274838][ T1080] RIP: 0010:collapse_file+0x1f9d/0x4170
[   64.280411][ T1080] Code: a1 c0 ff 31 c9 ba 01 00 00 00 4c 89 fe 48 8b bd c0 fe ff ff e8 e4 e9 ec ff e9 b4 fd ff ff 4c 8b bd 88 fe ff ff e8 93 a1 c0 ff <0f> 0b 4c 8b a3 50 ff ff ff c7 85 80 fe ff ff 00 00 00 00 e9 05 f6
[   64.299995][ T1080] RSP: 0000:ffff8880a7de7ad0 EFLAGS: 00010293
[   64.306048][ T1080] RAX: ffff8880a7e10440 RBX: ffff8880a7de7c88 RCX: ffffffff81b2b688
[   64.314017][ T1080] RDX: 0000000000000000 RSI: ffffffff81b2b9ad RDI: 0000000000000001
[   64.321999][ T1080] RBP: ffff8880a7de7cb0 R08: ffff8880a7e10440 R09: fffff9400046f3e1
[   64.329982][ T1080] R10: fffff9400046f3e0 R11: ffffea0002379f07 R12: 0000000000000001
[   64.337950][ T1080] R13: ffffea00023ac088 R14: 0000000000000000 R15: ffffea0002300000
[   64.345962][ T1080]  ? collapse_file+0x1c78/0x4170
[   64.350882][ T1080]  ? collapse_file+0x1f9d/0x4170
[   64.355804][ T1080]  ? rcu_lockdep_current_cpu_online+0xe3/0x130
[   64.361937][ T1080]  ? khugepaged+0x21d0/0x4360
[   64.366593][ T1080]  ? trace_event_raw_event_mm_collapse_huge_page_isolate+0x370/0x370
[   64.374644][ T1080]  ? __sanitizer_cov_trace_cmp4+0x16/0x20
[   64.380337][ T1080]  ? khugepaged_find_target_node+0x142/0x180
[   64.386311][ T1080]  khugepaged+0x2da9/0x4360
[   64.390821][ T1080]  ? __kasan_check_read+0x11/0x20
[   64.395837][ T1080]  ? __lock_acquire+0x16f2/0x4a00
[   64.400839][ T1080]  ? _raw_spin_unlock_irq+0x23/0x80
[   64.406030][ T1080]  ? finish_task_switch+0x147/0x750
[   64.411210][ T1080]  ? _raw_spin_unlock_irq+0x23/0x80
[   64.416385][ T1080]  ? lockdep_hardirqs_on+0x421/0x5e0
[   64.421674][ T1080]  ? collapse_pte_mapped_thp+0xbe0/0xbe0
[   64.427311][ T1080]  ? lock_downgrade+0x920/0x920
[   64.432169][ T1080]  ? finish_wait+0x260/0x260
[   64.436762][ T1080]  ? lockdep_hardirqs_on+0x421/0x5e0
[   64.442051][ T1080]  ? trace_hardirqs_on+0x67/0x240
[   64.447082][ T1080]  ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20
[   64.453446][ T1080]  ? __kthread_parkme+0x108/0x1c0
[   64.458465][ T1080]  ? __kasan_check_read+0x11/0x20
[   64.463468][ T1080]  kthread+0x361/0x430
[   64.467514][ T1080]  ? collapse_pte_mapped_thp+0xbe0/0xbe0
[   64.473141][ T1080]  ? kthread_mod_delayed_work+0x1f0/0x1f0
[   64.478848][ T1080]  ret_from_fork+0x24/0x30
[   64.484606][ T1080] Kernel Offset: disabled
[   64.488989][ T1080] Rebooting in 86400 seconds..