[ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ 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 '10.128.0.107' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 59.810892][ T7055] overlayfs: upper fs does not support RENAME_WHITEOUT. [ 59.818017][ T7055] overlayfs: upper fs does not support xattr, falling back to index=off and metacopy=off. [ 59.845524][ T7055] ------------[ cut here ]------------ [ 59.851075][ T7055] kernel BUG at mm/hugetlb.c:3776! [ 59.856291][ T7055] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 59.862359][ T7055] CPU: 0 PID: 7055 Comm: syz-executor584 Not tainted 5.6.0-syzkaller #0 [ 59.871447][ T7055] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.881516][ T7055] RIP: 0010:__unmap_hugepage_range+0xa39/0xbd0 [ 59.887656][ T7055] Code: 00 48 c7 c7 40 56 35 88 e8 34 d5 a1 ff e9 c9 fd ff ff e8 3a f2 c5 ff 0f 0b e9 b0 f7 ff ff e8 2e f2 c5 ff 0f 0b e8 27 f2 c5 ff <0f> 0b e8 20 f2 c5 ff 83 8c 24 c0 00 00 00 01 48 8d bc 24 a0 00 00 [ 59.907859][ T7055] RSP: 0000:ffffc900015f7768 EFLAGS: 00010293 [ 59.913902][ T7055] RAX: ffff8880a8fde480 RBX: ffffffff8c672fb8 RCX: ffffffff81ad29c4 [ 59.921859][ T7055] RDX: 0000000000000000 RSI: ffffffff81ad31c9 RDI: 0000000000000007 [ 59.929813][ T7055] RBP: 0000000020000000 R08: ffff8880a8fde480 R09: ffffed1012acc077 [ 59.937765][ T7055] R10: ffff8880956603b7 R11: ffffed1012acc076 R12: 0000000008440070 [ 59.945799][ T7055] R13: 0000000000003000 R14: 0000000000000000 R15: 0000000000400000 [ 59.953748][ T7055] FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 59.962651][ T7055] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 59.969209][ T7055] CR2: 0000000020000000 CR3: 0000000099c6e000 CR4: 00000000001406f0 [ 59.977206][ T7055] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 59.985159][ T7055] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 59.993376][ T7055] Call Trace: [ 59.996653][ T7055] ? huge_pte_offset+0x410/0x410 [ 60.001569][ T7055] ? down_write+0xdb/0x150 [ 60.005971][ T7055] ? __down_timeout+0x2d0/0x2d0 [ 60.010806][ T7055] __unmap_hugepage_range_final+0x30/0x70 [ 60.016682][ T7055] unmap_single_vma+0x238/0x300 [ 60.021508][ T7055] unmap_vmas+0x16f/0x2f0 [ 60.025814][ T7055] ? zap_vma_ptes+0x100/0x100 [ 60.030476][ T7055] exit_mmap+0x2aa/0x510 [ 60.034700][ T7055] ? __ia32_sys_munmap+0x80/0x80 [ 60.039633][ T7055] ? __khugepaged_exit+0x2d5/0x3f0 [ 60.044726][ T7055] ? kmem_cache_free+0x262/0x320 [ 60.049666][ T7055] ? __khugepaged_exit+0x2f6/0x3f0 [ 60.054755][ T7055] mmput+0x168/0x4b0 [ 60.058623][ T7055] do_exit+0xa51/0x2dd0 [ 60.062753][ T7055] ? lock_downgrade+0x811/0x840 [ 60.067589][ T7055] ? mm_update_next_owner+0x7a0/0x7a0 [ 60.072939][ T7055] do_group_exit+0x125/0x340 [ 60.077507][ T7055] get_signal+0x47b/0x24e0 [ 60.081934][ T7055] do_signal+0x81/0x2240 [ 60.086689][ T7055] ? spurious_kernel_fault_check+0xf0/0xf0 [ 60.092480][ T7055] ? up_read+0x1ab/0x750 [ 60.096705][ T7055] ? get_sigframe.isra.0+0x730/0x730 [ 60.101987][ T7055] ? __bad_area_nosemaphore+0x32c/0x420 [ 60.107521][ T7055] ? bad_area_access_error+0x29c/0x3b0 [ 60.112959][ T7055] exit_to_usermode_loop+0x26c/0x360 [ 60.118486][ T7055] prepare_exit_to_usermode+0x2f6/0x3d0 [ 60.124007][ T7055] ret_from_intr+0x26/0x2b [ 60.128399][ T7055] RIP: 0033:0x400f79 [ 60.132277][ T7055] Code: Bad RIP value. [ 60.136318][ T7055] RSP: 002b:00007f868a73fdc0 EFLAGS: 00010246 [ 60.142355][ T7055] RAX: 0030656c69662f2e RBX: 00000000006dac28 RCX: 00000000004459f9 [ 60.150314][ T7055] RDX: 0000000000000000 RSI: 0000000020000000 RDI: 00000000006dac28 [ 60.158264][ T7055] RBP: 00000000006dac20 R08: 0000000000000000 R09: 0000000000000000 [ 60.166213][ T7055] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dac2c [ 60.174194][ T7055] R13: 00007fff5bde760f R14: 00007f868a7409c0 R15: 20c49ba5e353f7cf [ 60.182147][ T7055] Modules linked in: [ 60.186434][ T7055] ---[ end trace 8dc01f5ba93f784f ]--- [ 60.191991][ T7055] RIP: 0010:__unmap_hugepage_range+0xa39/0xbd0 [ 60.198232][ T7055] Code: 00 48 c7 c7 40 56 35 88 e8 34 d5 a1 ff e9 c9 fd ff ff e8 3a f2 c5 ff 0f 0b e9 b0 f7 ff ff e8 2e f2 c5 ff 0f 0b e8 27 f2 c5 ff <0f> 0b e8 20 f2 c5 ff 83 8c 24 c0 00 00 00 01 48 8d bc 24 a0 00 00 [ 60.217893][ T7055] RSP: 0000:ffffc900015f7768 EFLAGS: 00010293 [ 60.223955][ T7055] RAX: ffff8880a8fde480 RBX: ffffffff8c672fb8 RCX: ffffffff81ad29c4 [ 60.231969][ T7055] RDX: 0000000000000000 RSI: ffffffff81ad31c9 RDI: 0000000000000007 [ 60.239996][ T7055] RBP: 0000000020000000 R08: ffff8880a8fde480 R09: ffffed1012acc077 [ 60.248008][ T7055] R10: ffff8880956603b7 R11: ffffed1012acc076 R12: 0000000008440070 [ 60.256061][ T7055] R13: 0000000000003000 R14: 0000000000000000 R15: 0000000000400000 [ 60.264076][ T7055] FS: 00007f868a740700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 60.273054][ T7055] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 60.279688][ T7055] CR2: 0000000000400f4f CR3: 0000000099c6e000 CR4: 00000000001406f0 [ 60.287855][ T7055] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 60.295850][ T7055] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 60.303889][ T7055] Kernel panic - not syncing: Fatal exception [ 60.311276][ T7055] Kernel Offset: disabled [ 60.315600][ T7055] Rebooting in 86400 seconds..