[ 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 '10.128.1.7' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 74.550249][ T7078] overlayfs: upper fs does not support RENAME_WHITEOUT. [ 74.559783][ T7078] overlayfs: upper fs does not support xattr, falling back to index=off and metacopy=off. [ 74.576221][ T7078] ------------[ cut here ]------------ [ 74.581840][ T7078] kernel BUG at mm/hugetlb.c:3814! [ 74.587285][ T7078] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 74.593385][ T7078] CPU: 1 PID: 7078 Comm: syz-executor386 Not tainted 5.6.0-syzkaller #0 [ 74.601717][ T7078] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.612736][ T7078] RIP: 0010:__unmap_hugepage_range+0xa39/0xbd0 [ 74.618969][ T7078] Code: 00 48 c7 c7 80 5e 35 88 e8 44 ba a1 ff e9 c9 fd ff ff e8 9a d6 c5 ff 0f 0b e9 b0 f7 ff ff e8 8e d6 c5 ff 0f 0b e8 87 d6 c5 ff <0f> 0b e8 80 d6 c5 ff 83 8c 24 c0 00 00 00 01 48 8d bc 24 a0 00 00 [ 74.638558][ T7078] RSP: 0018:ffffc90000ed79b0 EFLAGS: 00010293 [ 74.644647][ T7078] RAX: ffff8880a1b48600 RBX: ffffffff8c6781d8 RCX: ffffffff81ad5574 [ 74.652604][ T7078] RDX: 0000000000000000 RSI: ffffffff81ad5d79 RDI: 0000000000000007 [ 74.660557][ T7078] RBP: 0000000020000000 R08: ffff8880a1b48600 R09: ffffed1013464db3 [ 74.668510][ T7078] R10: ffff88809a326d97 R11: ffffed1013464db2 R12: 0000000008440070 [ 74.676472][ T7078] R13: 0000000000003000 R14: 0000000000000000 R15: 0000000000400000 [ 74.684436][ T7078] FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 74.693457][ T7078] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 74.700046][ T7078] CR2: 0000000020000000 CR3: 000000008f275000 CR4: 00000000001406e0 [ 74.708015][ T7078] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 74.716116][ T7078] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 74.724195][ T7078] Call Trace: [ 74.727523][ T7078] ? huge_pte_offset+0x410/0x410 [ 74.732467][ T7078] ? down_write+0xdb/0x150 [ 74.736875][ T7078] ? __down_timeout+0x2d0/0x2d0 [ 74.741716][ T7078] __unmap_hugepage_range_final+0x30/0x70 [ 74.747418][ T7078] unmap_single_vma+0x238/0x300 [ 74.752248][ T7078] unmap_vmas+0x16f/0x2f0 [ 74.756574][ T7078] ? zap_vma_ptes+0x100/0x100 [ 74.761237][ T7078] exit_mmap+0x2aa/0x510 [ 74.765459][ T7078] ? __ia32_sys_munmap+0x80/0x80 [ 74.770382][ T7078] ? __khugepaged_exit+0x2d5/0x3f0 [ 74.775483][ T7078] ? kmem_cache_free+0x262/0x320 [ 74.780406][ T7078] ? __khugepaged_exit+0x2f6/0x3f0 [ 74.785498][ T7078] mmput+0x168/0x4b0 [ 74.789369][ T7078] do_exit+0xa51/0x2dd0 [ 74.793510][ T7078] ? randomize_stack_top+0x100/0x100 [ 74.798783][ T7078] ? mm_update_next_owner+0x7a0/0x7a0 [ 74.804142][ T7078] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 74.810103][ T7078] ? fput_many+0x2f/0x1a0 [ 74.814411][ T7078] ? ksys_mmap_pgoff+0xe0/0x5b0 [ 74.819263][ T7078] do_group_exit+0x125/0x340 [ 74.823842][ T7078] __x64_sys_exit_group+0x3a/0x50 [ 74.828930][ T7078] do_syscall_64+0xf6/0x7d0 [ 74.833422][ T7078] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 74.839287][ T7078] RIP: 0033:0x43efb8 [ 74.843267][ T7078] Code: Bad RIP value. [ 74.847324][ T7078] RSP: 002b:00007ffcf34c3d48 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 74.855880][ T7078] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043efb8 [ 74.863970][ T7078] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 74.872103][ T7078] RBP: 00000000004be7c8 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 74.880074][ T7078] R10: 0000000000010012 R11: 0000000000000246 R12: 0000000000000001 [ 74.888026][ T7078] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 74.895990][ T7078] Modules linked in: [ 74.900128][ T7078] ---[ end trace 870f9b0341740bdf ]--- [ 74.905638][ T7078] RIP: 0010:__unmap_hugepage_range+0xa39/0xbd0 [ 74.911985][ T7078] Code: 00 48 c7 c7 80 5e 35 88 e8 44 ba a1 ff e9 c9 fd ff ff e8 9a d6 c5 ff 0f 0b e9 b0 f7 ff ff e8 8e d6 c5 ff 0f 0b e8 87 d6 c5 ff <0f> 0b e8 80 d6 c5 ff 83 8c 24 c0 00 00 00 01 48 8d bc 24 a0 00 00 [ 74.931640][ T7078] RSP: 0018:ffffc90000ed79b0 EFLAGS: 00010293 [ 74.937773][ T7078] RAX: ffff8880a1b48600 RBX: ffffffff8c6781d8 RCX: ffffffff81ad5574 [ 74.945882][ T7078] RDX: 0000000000000000 RSI: ffffffff81ad5d79 RDI: 0000000000000007 [ 74.953896][ T7078] RBP: 0000000020000000 R08: ffff8880a1b48600 R09: ffffed1013464db3 [ 74.961916][ T7078] R10: ffff88809a326d97 R11: ffffed1013464db2 R12: 0000000008440070 [ 74.969892][ T7078] R13: 0000000000003000 R14: 0000000000000000 R15: 0000000000400000 [ 74.977959][ T7078] FS: 00000000024af880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 74.986978][ T7078] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 74.993658][ T7078] CR2: 000000000043ef8e CR3: 000000008f275000 CR4: 00000000001406e0 [ 75.001639][ T7078] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 75.009652][ T7078] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 75.017685][ T7078] Kernel panic - not syncing: Fatal exception [ 75.025259][ T7078] Kernel Offset: disabled [ 75.029605][ T7078] Rebooting in 86400 seconds..