[ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.79' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 42.061509][ T7046] overlayfs: upper fs does not support RENAME_WHITEOUT. [ 42.068918][ T7046] overlayfs: upper fs does not support xattr, falling back to index=off and metacopy=off. [ 42.084149][ T7046] ------------[ cut here ]------------ [ 42.089846][ T7046] kernel BUG at mm/hugetlb.c:3814! [ 42.096284][ T7046] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 42.102523][ T7046] CPU: 1 PID: 7046 Comm: syz-executor034 Not tainted 5.6.0-syzkaller #0 [ 42.111012][ T7046] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.121278][ T7046] RIP: 0010:__unmap_hugepage_range+0xe7b/0xeb0 [ 42.127499][ T7046] Code: bc 24 e8 00 00 00 e8 e4 03 04 00 e9 9f fe ff ff e8 da 25 c6 ff 0f 0b e8 d3 25 c6 ff 0f 0b e8 cc 25 c6 ff 0f 0b e8 c5 25 c6 ff <0f> 0b e8 be 25 c6 ff 48 89 ef e8 36 27 f3 ff 0f 0b e8 af 25 c6 ff [ 42.147129][ T7046] RSP: 0018:ffffc90001477a08 EFLAGS: 00010293 [ 42.153381][ T7046] RAX: ffffffff81ad3d0b RBX: 0000000000003000 RCX: ffff8880a759a2c0 [ 42.161569][ T7046] RDX: 0000000000000000 RSI: 0000000000003000 RDI: 0000000000000000 [ 42.170494][ T7046] RBP: ffff88809cf81d68 R08: ffffffff81ad3054 R09: ffffed101347a7b3 [ 42.178649][ T7046] R10: ffffed101347a7b3 R11: 0000000000000000 R12: 0000000020000000 [ 42.186760][ T7046] R13: dffffc0000000000 R14: ffffffff8b5a3988 R15: 0000000020003000 [ 42.194931][ T7046] FS: 0000000001c04880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 42.204102][ T7046] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.210903][ T7046] CR2: 00007fb24a5a9000 CR3: 0000000093304000 CR4: 00000000001406e0 [ 42.219202][ T7046] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.227176][ T7046] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.235136][ T7046] Call Trace: [ 42.238414][ T7046] ? lock_acquire+0x169/0x480 [ 42.243181][ T7046] __unmap_hugepage_range_final+0x31/0x70 [ 42.249193][ T7046] unmap_single_vma+0x260/0x2d0 [ 42.254037][ T7046] unmap_vmas+0x15d/0x2c0 [ 42.258625][ T7046] exit_mmap+0x276/0x530 [ 42.262857][ T7046] __mmput+0x113/0x350 [ 42.267078][ T7046] exit_mm+0x4cd/0x550 [ 42.271146][ T7046] ? taskstats_exit+0x474/0xba0 [ 42.276067][ T7046] do_exit+0x56e/0x1f80 [ 42.280220][ T7046] ? vm_mmap_pgoff+0x1b2/0x1e0 [ 42.284966][ T7046] do_group_exit+0x15e/0x2c0 [ 42.289539][ T7046] ? trace_irq_disable_rcuidle+0x1f/0x1d0 [ 42.295239][ T7046] __do_sys_exit_group+0x13/0x20 [ 42.300247][ T7046] __se_sys_exit_group+0x10/0x10 [ 42.305169][ T7046] __x64_sys_exit_group+0x37/0x40 [ 42.310304][ T7046] do_syscall_64+0xf3/0x1b0 [ 42.314842][ T7046] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 42.320718][ T7046] RIP: 0033:0x43efb8 [ 42.324815][ T7046] Code: Bad RIP value. [ 42.328865][ T7046] RSP: 002b:00007ffc8d9a85b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 42.337260][ T7046] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043efb8 [ 42.345252][ T7046] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 42.353580][ T7046] RBP: 00000000004be7c8 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 42.362021][ T7046] R10: 0000000000010012 R11: 0000000000000246 R12: 0000000000000001 [ 42.370250][ T7046] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 42.378539][ T7046] Modules linked in: [ 42.391533][ T7046] ---[ end trace dda1a59da673a3b3 ]--- [ 42.397450][ T7046] RIP: 0010:__unmap_hugepage_range+0xe7b/0xeb0 [ 42.404787][ T7046] Code: bc 24 e8 00 00 00 e8 e4 03 04 00 e9 9f fe ff ff e8 da 25 c6 ff 0f 0b e8 d3 25 c6 ff 0f 0b e8 cc 25 c6 ff 0f 0b e8 c5 25 c6 ff <0f> 0b e8 be 25 c6 ff 48 89 ef e8 36 27 f3 ff 0f 0b e8 af 25 c6 ff [ 42.425847][ T7046] RSP: 0018:ffffc90001477a08 EFLAGS: 00010293 [ 42.432182][ T7046] RAX: ffffffff81ad3d0b RBX: 0000000000003000 RCX: ffff8880a759a2c0 [ 42.441224][ T7046] RDX: 0000000000000000 RSI: 0000000000003000 RDI: 0000000000000000 [ 42.449974][ T7046] RBP: ffff88809cf81d68 R08: ffffffff81ad3054 R09: ffffed101347a7b3 [ 42.459100][ T7046] R10: ffffed101347a7b3 R11: 0000000000000000 R12: 0000000020000000 [ 42.468015][ T7046] R13: dffffc0000000000 R14: ffffffff8b5a3988 R15: 0000000020003000 [ 42.477351][ T7046] FS: 0000000001c04880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 42.487320][ T7046] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.494989][ T7046] CR2: 00007fb24a5ae010 CR3: 0000000093304000 CR4: 00000000001406e0 [ 42.503925][ T7046] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.512571][ T7046] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.521518][ T7046] Kernel panic - not syncing: Fatal exception [ 42.529481][ T7046] Kernel Offset: disabled [ 42.534225][ T7046] Rebooting in 86400 seconds..