[  OK  ] Reached target Login Prompts.
[  OK  ] Reached target Multi-User System.
[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
[  OK  ] Started Update UTMP about System Runlevel Changes.


Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.1.8' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   75.040626][ T7028] overlayfs: upper fs does not support xattr, falling back to index=off and metacopy=off.
[   75.056719][ T7028] ------------[ cut here ]------------
[   75.062439][ T7028] kernel BUG at mm/hugetlb.c:3775!
[   75.068034][ T7028] invalid opcode: 0000 [#1] PREEMPT SMP KASAN
[   75.074152][ T7028] CPU: 0 PID: 7028 Comm: syz-executor490 Not tainted 5.6.0-syzkaller #0
[   75.082474][ T7028] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   75.092637][ T7028] RIP: 0010:__unmap_hugepage_range+0xa39/0xbd0
[   75.098798][ T7028] Code: 00 48 c7 c7 80 50 35 88 e8 b4 c9 a1 ff e9 c9 fd ff ff e8 1a e7 c5 ff 0f 0b e9 b0 f7 ff ff e8 0e e7 c5 ff 0f 0b e8 07 e7 c5 ff <0f> 0b e8 00 e7 c5 ff 83 8c 24 c0 00 00 00 01 48 8d bc 24 a0 00 00
[   75.119084][ T7028] RSP: 0018:ffffc900010779b0 EFLAGS: 00010293
[   75.125149][ T7028] RAX: ffff8880a1b2c280 RBX: ffffffff8c66a338 RCX: ffffffff81ad4264
[   75.133116][ T7028] RDX: 0000000000000000 RSI: ffffffff81ad4a69 RDI: 0000000000000007
[   75.141191][ T7028] RBP: 0000000020000000 R08: ffff8880a1b2c280 R09: ffffed10147b4a77
[   75.149350][ T7028] R10: ffff8880a3da53b7 R11: ffffed10147b4a76 R12: 00000000084400f8
[   75.158101][ T7028] R13: 0000000000003000 R14: 0000000000000000 R15: 0000000000400000
[   75.166246][ T7028] FS:  0000000001a93880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
[   75.175511][ T7028] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   75.182098][ T7028] CR2: 0000000020000140 CR3: 000000009e62c000 CR4: 00000000001406f0
[   75.190068][ T7028] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   75.198020][ T7028] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   75.205971][ T7028] Call Trace:
[   75.209266][ T7028]  ? huge_pte_offset+0x410/0x410
[   75.214336][ T7028]  ? down_write+0xdb/0x150
[   75.218747][ T7028]  ? __down_timeout+0x2d0/0x2d0
[   75.223710][ T7028]  __unmap_hugepage_range_final+0x30/0x70
[   75.229615][ T7028]  unmap_single_vma+0x238/0x300
[   75.234765][ T7028]  unmap_vmas+0x16f/0x2f0
[   75.239079][ T7028]  ? zap_vma_ptes+0x100/0x100
[   75.244000][ T7028]  exit_mmap+0x2aa/0x510
[   75.248237][ T7028]  ? __ia32_sys_munmap+0x80/0x80
[   75.253327][ T7028]  ? __khugepaged_exit+0x2d5/0x3f0
[   75.258867][ T7028]  ? kmem_cache_free+0x262/0x320
[   75.263826][ T7028]  ? __khugepaged_exit+0x2f6/0x3f0
[   75.269161][ T7028]  mmput+0x168/0x4b0
[   75.273045][ T7028]  do_exit+0xa51/0x2dd0
[   75.277187][ T7028]  ? randomize_stack_top+0x100/0x100
[   75.282471][ T7028]  ? mm_update_next_owner+0x7a0/0x7a0
[   75.287832][ T7028]  ? rcu_read_lock_any_held.part.0+0x50/0x50
[   75.293795][ T7028]  ? fput_many+0x2f/0x1a0
[   75.298118][ T7028]  ? ksys_mmap_pgoff+0xe0/0x5b0
[   75.302963][ T7028]  do_group_exit+0x125/0x340
[   75.307549][ T7028]  __x64_sys_exit_group+0x3a/0x50
[   75.312712][ T7028]  do_syscall_64+0xf6/0x7d0
[   75.317339][ T7028]  entry_SYSCALL_64_after_hwframe+0x49/0xb3
[   75.323345][ T7028] RIP: 0033:0x43efe8
[   75.327408][ T7028] Code: Bad RIP value.
[   75.331606][ T7028] RSP: 002b:00007ffe8f892878 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   75.340018][ T7028] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043efe8
[   75.347974][ T7028] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
[   75.356057][ T7028] RBP: 00000000004be7e8 R08: 00000000000000e7 R09: ffffffffffffffd0
[   75.364161][ T7028] R10: 0000040000000011 R11: 0000000000000246 R12: 0000000000000001
[   75.372200][ T7028] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000
[   75.380156][ T7028] Modules linked in:
[   75.386266][ T7028] ---[ end trace ca943abbcc3c8f9e ]---
[   75.391783][ T7028] RIP: 0010:__unmap_hugepage_range+0xa39/0xbd0
[   75.398016][ T7028] Code: 00 48 c7 c7 80 50 35 88 e8 b4 c9 a1 ff e9 c9 fd ff ff e8 1a e7 c5 ff 0f 0b e9 b0 f7 ff ff e8 0e e7 c5 ff 0f 0b e8 07 e7 c5 ff <0f> 0b e8 00 e7 c5 ff 83 8c 24 c0 00 00 00 01 48 8d bc 24 a0 00 00
[   75.417696][ T7028] RSP: 0018:ffffc900010779b0 EFLAGS: 00010293
[   75.423935][ T7028] RAX: ffff8880a1b2c280 RBX: ffffffff8c66a338 RCX: ffffffff81ad4264
[   75.432118][ T7028] RDX: 0000000000000000 RSI: ffffffff81ad4a69 RDI: 0000000000000007
[   75.441580][ T7028] RBP: 0000000020000000 R08: ffff8880a1b2c280 R09: ffffed10147b4a77
[   75.449775][ T7028] R10: ffff8880a3da53b7 R11: ffffed10147b4a76 R12: 00000000084400f8
[   75.458044][ T7028] R13: 0000000000003000 R14: 0000000000000000 R15: 0000000000400000
[   75.466076][ T7028] FS:  0000000001a93880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
[   75.475068][ T7028] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   75.481641][ T7028] CR2: 000000000043efbe CR3: 000000009e62c000 CR4: 00000000001406f0
[   75.489704][ T7028] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   75.498194][ T7028] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   75.506251][ T7028] Kernel panic - not syncing: Fatal exception
[   75.513882][ T7028] Kernel Offset: disabled
[   75.518220][ T7028] Rebooting in 86400 seconds..