[ 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 '10.128.0.126' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 68.633575][ T7111] overlayfs: upper fs does not support RENAME_WHITEOUT. [ 68.640724][ T7111] overlayfs: upper fs does not support xattr, falling back to index=off and metacopy=off. [ 68.657032][ T7111] ------------[ cut here ]------------ [ 68.662694][ T7111] kernel BUG at mm/hugetlb.c:3814! [ 68.669112][ T7111] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 68.675332][ T7111] CPU: 1 PID: 7111 Comm: syz-executor188 Not tainted 5.7.0-rc1-next-20200415-syzkaller #0 [ 68.685198][ T7111] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.695257][ T7111] RIP: 0010:__unmap_hugepage_range+0xa39/0xbd0 [ 68.701394][ T7111] Code: 00 48 c7 c7 40 69 35 88 e8 54 5f a1 ff e9 c9 fd ff ff e8 da 7c c5 ff 0f 0b e9 b0 f7 ff ff e8 ce 7c c5 ff 0f 0b e8 c7 7c c5 ff <0f> 0b e8 c0 7c c5 ff 83 8c 24 c0 00 00 00 01 48 8d bc 24 a0 00 00 [ 68.721141][ T7111] RSP: 0018:ffffc90005ea79b0 EFLAGS: 00010293 [ 68.727188][ T7111] RAX: ffff8880a822e040 RBX: ffffffff8c6a5298 RCX: ffffffff81adafc4 [ 68.735140][ T7111] RDX: 0000000000000000 RSI: ffffffff81adb7c9 RDI: 0000000000000007 [ 68.743129][ T7111] RBP: 0000000020000000 R08: ffff8880a822e040 R09: ffffed1012868719 [ 68.751091][ T7111] R10: ffff8880943438c7 R11: ffffed1012868718 R12: 0000000008440070 [ 68.759051][ T7111] R13: 0000000000003000 R14: 0000000000000000 R15: 0000000000400000 [ 68.767004][ T7111] FS: 0000000002001880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 68.775912][ T7111] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 68.782472][ T7111] CR2: 0000000020000000 CR3: 0000000093b84000 CR4: 00000000001406e0 [ 68.790520][ T7111] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 68.798469][ T7111] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 68.806433][ T7111] Call Trace: [ 68.809711][ T7111] ? huge_pte_offset+0x410/0x410 [ 68.814653][ T7111] ? down_write+0xdb/0x150 [ 68.819048][ T7111] ? down_write_killable+0x170/0x170 [ 68.824315][ T7111] __unmap_hugepage_range_final+0x30/0x70 [ 68.830015][ T7111] unmap_single_vma+0x238/0x300 [ 68.834867][ T7111] unmap_vmas+0x16f/0x2f0 [ 68.839177][ T7111] ? zap_vma_ptes+0x100/0x100 [ 68.843838][ T7111] exit_mmap+0x2aa/0x510 [ 68.848056][ T7111] ? __ia32_sys_munmap+0x80/0x80 [ 68.852974][ T7111] ? __khugepaged_exit+0x2d5/0x3f0 [ 68.858070][ T7111] ? kmem_cache_free+0x262/0x320 [ 68.862988][ T7111] ? __khugepaged_exit+0x2f6/0x3f0 [ 68.868076][ T7111] mmput+0x168/0x4b0 [ 68.871948][ T7111] do_exit+0xa72/0x2e10 [ 68.876111][ T7111] ? randomize_stack_top+0x100/0x100 [ 68.881398][ T7111] ? mm_update_next_owner+0x7a0/0x7a0 [ 68.886769][ T7111] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 68.892735][ T7111] ? fput_many+0x2f/0x1a0 [ 68.897055][ T7111] ? ksys_mmap_pgoff+0xe0/0x5b0 [ 68.901896][ T7111] do_group_exit+0x125/0x340 [ 68.906478][ T7111] __x64_sys_exit_group+0x3a/0x50 [ 68.911606][ T7111] do_syscall_64+0xf6/0x7d0 [ 68.916117][ T7111] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 68.922143][ T7111] RIP: 0033:0x43efb8 [ 68.926028][ T7111] Code: Bad RIP value. [ 68.930071][ T7111] RSP: 002b:00007ffebdf09e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 68.938517][ T7111] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043efb8 [ 68.946505][ T7111] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 68.954471][ T7111] RBP: 00000000004be7c8 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 68.962423][ T7111] R10: 0000000000010012 R11: 0000000000000246 R12: 0000000000000001 [ 68.970374][ T7111] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 68.978345][ T7111] Modules linked in: [ 68.983492][ T7111] ---[ end trace bcafe69c4489a3a6 ]--- [ 68.989103][ T7111] RIP: 0010:__unmap_hugepage_range+0xa39/0xbd0 [ 68.995774][ T7111] Code: 00 48 c7 c7 40 69 35 88 e8 54 5f a1 ff e9 c9 fd ff ff e8 da 7c c5 ff 0f 0b e9 b0 f7 ff ff e8 ce 7c c5 ff 0f 0b e8 c7 7c c5 ff <0f> 0b e8 c0 7c c5 ff 83 8c 24 c0 00 00 00 01 48 8d bc 24 a0 00 00 [ 69.016214][ T7111] RSP: 0018:ffffc90005ea79b0 EFLAGS: 00010293 [ 69.022341][ T7111] RAX: ffff8880a822e040 RBX: ffffffff8c6a5298 RCX: ffffffff81adafc4 [ 69.030336][ T7111] RDX: 0000000000000000 RSI: ffffffff81adb7c9 RDI: 0000000000000007 [ 69.038896][ T7111] RBP: 0000000020000000 R08: ffff8880a822e040 R09: ffffed1012868719 [ 69.046960][ T7111] R10: ffff8880943438c7 R11: ffffed1012868718 R12: 0000000008440070 [ 69.055004][ T7111] R13: 0000000000003000 R14: 0000000000000000 R15: 0000000000400000 [ 69.063014][ T7111] FS: 0000000002001880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 69.071992][ T7111] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 69.078723][ T7111] CR2: 00007f4ce0041018 CR3: 000000009a49c000 CR4: 00000000001406f0 [ 69.086734][ T7111] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 69.094762][ T7111] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 69.102763][ T7111] Kernel panic - not syncing: Fatal exception [ 69.110377][ T7111] Kernel Offset: disabled [ 69.114720][ T7111] Rebooting in 86400 seconds..