[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty2. [ 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. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.198' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 59.691386][ T7036] overlayfs: upper fs does not support xattr, falling back to index=off and metacopy=off. [ 59.706141][ T7036] ------------[ cut here ]------------ [ 59.711685][ T7036] kernel BUG at mm/hugetlb.c:3416! [ 59.718876][ T7036] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 59.724970][ T7036] CPU: 0 PID: 7036 Comm: syz-executor110 Not tainted 5.6.0-syzkaller #0 [ 59.733326][ T7036] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.743384][ T7036] RIP: 0010:__unmap_hugepage_range+0xa26/0xbc0 [ 59.749512][ T7036] Code: 00 48 c7 c7 60 37 35 88 e8 57 b4 a2 ff e9 b3 fd ff ff e8 cd 90 c6 ff 0f 0b e9 c4 f7 ff ff e8 c1 90 c6 ff 0f 0b e8 ba 90 c6 ff <0f> 0b e8 b3 90 c6 ff 83 8c 24 c0 00 00 00 01 48 8d bc 24 a0 00 00 [ 59.769209][ T7036] RSP: 0018:ffffc900017779b0 EFLAGS: 00010293 [ 59.775253][ T7036] RAX: ffff88808cf5c2c0 RBX: ffffffff8c641c08 RCX: ffffffff81ac50b4 [ 59.783203][ T7036] RDX: 0000000000000000 RSI: ffffffff81ac58a6 RDI: 0000000000000007 [ 59.791155][ T7036] RBP: 0000000020000000 R08: ffff88808cf5c2c0 R09: ffffed10129d8111 [ 59.799105][ T7036] R10: ffffed10129d8110 R11: ffff888094ec0887 R12: 0000000000003000 [ 59.807053][ T7036] R13: 0000000000000000 R14: 0000000020003000 R15: 0000000000200000 [ 59.815037][ T7036] FS: 00000000013c0880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 59.823942][ T7036] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 59.830510][ T7036] CR2: 0000000020000140 CR3: 0000000093554000 CR4: 00000000001406f0 [ 59.838467][ T7036] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 59.846427][ T7036] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 59.854547][ T7036] Call Trace: [ 59.857829][ T7036] ? huge_pte_offset+0x410/0x410 [ 59.862760][ T7036] ? down_write+0xdb/0x150 [ 59.867192][ T7036] ? __down_timeout+0x2d0/0x2d0 [ 59.872018][ T7036] __unmap_hugepage_range_final+0x30/0x70 [ 59.877716][ T7036] unmap_single_vma+0x238/0x300 [ 59.882562][ T7036] unmap_vmas+0x16f/0x2f0 [ 59.886869][ T7036] ? zap_vma_ptes+0x100/0x100 [ 59.891524][ T7036] ? __schedule+0x93f/0x1ff0 [ 59.896103][ T7036] ? __sched_text_start+0x8/0x8 [ 59.900930][ T7036] exit_mmap+0x2aa/0x510 [ 59.905161][ T7036] ? __ia32_sys_munmap+0x80/0x80 [ 59.910091][ T7036] ? kmem_cache_free+0x1c0/0x320 [ 59.915012][ T7036] ? __khugepaged_exit+0x2f6/0x3f0 [ 59.920100][ T7036] mmput+0x168/0x4b0 [ 59.923983][ T7036] do_exit+0xa51/0x2dd0 [ 59.928134][ T7036] ? randomize_stack_top+0x100/0x100 [ 59.933406][ T7036] ? mm_update_next_owner+0x7a0/0x7a0 [ 59.938766][ T7036] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.944725][ T7036] ? fput_many+0x2f/0x1a0 [ 59.949042][ T7036] ? ksys_mmap_pgoff+0xe0/0x5b0 [ 59.953869][ T7036] do_group_exit+0x125/0x340 [ 59.958438][ T7036] __x64_sys_exit_group+0x3a/0x50 [ 59.963439][ T7036] do_syscall_64+0xf6/0x7d0 [ 59.967921][ T7036] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 59.973786][ T7036] RIP: 0033:0x43efe8 [ 59.977707][ T7036] Code: Bad RIP value. [ 59.981751][ T7036] RSP: 002b:00007ffdfe6c00f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 59.990169][ T7036] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043efe8 [ 59.998120][ T7036] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 60.006071][ T7036] RBP: 00000000004be7e8 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 60.014021][ T7036] R10: 0000040000000011 R11: 0000000000000246 R12: 0000000000000001 [ 60.021978][ T7036] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 60.029934][ T7036] Modules linked in: [ 60.045478][ T7036] ---[ end trace 2d36245d65cb52f7 ]--- [ 60.050961][ T7036] RIP: 0010:__unmap_hugepage_range+0xa26/0xbc0 [ 60.063535][ T7036] Code: 00 48 c7 c7 60 37 35 88 e8 57 b4 a2 ff e9 b3 fd ff ff e8 cd 90 c6 ff 0f 0b e9 c4 f7 ff ff e8 c1 90 c6 ff 0f 0b e8 ba 90 c6 ff <0f> 0b e8 b3 90 c6 ff 83 8c 24 c0 00 00 00 01 48 8d bc 24 a0 00 00 [ 60.083727][ T7036] RSP: 0018:ffffc900017779b0 EFLAGS: 00010293 [ 60.090952][ T7036] RAX: ffff88808cf5c2c0 RBX: ffffffff8c641c08 RCX: ffffffff81ac50b4 [ 60.099418][ T7036] RDX: 0000000000000000 RSI: ffffffff81ac58a6 RDI: 0000000000000007 [ 60.107779][ T7036] RBP: 0000000020000000 R08: ffff88808cf5c2c0 R09: ffffed10129d8111 [ 60.116288][ T7036] R10: ffffed10129d8110 R11: ffff888094ec0887 R12: 0000000000003000 [ 60.124267][ T7036] R13: 0000000000000000 R14: 0000000020003000 R15: 0000000000200000 [ 60.133093][ T7036] FS: 00000000013c0880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 60.142515][ T7036] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 60.149488][ T7036] CR2: 00007f8cc24dd000 CR3: 0000000093554000 CR4: 00000000001406f0 [ 60.157854][ T7036] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 60.166198][ T7036] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 60.174162][ T7036] Kernel panic - not syncing: Fatal exception [ 60.181297][ T7036] Kernel Offset: disabled [ 60.185618][ T7036] Rebooting in 86400 seconds..