------------[ cut here ]------------
kernel BUG at mm/hugetlb.c:1162!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 12132 Comm: syz.1.1902 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:resv_map_release mm/hugetlb.c:1162 [inline]
RIP: 0010:resv_map_release+0x1e2/0x280 mm/hugetlb.c:1147
Code: ac 9c ff 48 85 db 75 1c e8 1b b2 9c ff 48 8b 3c 24 48 83 c4 10 5b 5d 41 5c 41 5d 41 5e 41 5f e9 24 c8 fa ff e8 ff b1 9c ff 90 <0f> 0b 4c 89 f7 e8 64 88 06 00 e9 38 ff ff ff 48 89 ef e8 67 87 06
RSP: 0018:ffffc90005eef848 EFLAGS: 00010293

RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff8222368b
RDX: ffff888012c4c980 RSI: ffffffff822236b1 RDI: 0000000000000007
RBP: ffff888033ff5c60 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000001 R11: ffff888012c4d4b0 R12: ffff888033ff5c60
R13: ffff888033ff5c60 R14: ffff888033ff5c60 R15: ffff8880540c6888
FS:  0000000000000000(0000) GS:ffff8880d68f5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000029aec000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 kref_put include/linux/kref.h:65 [inline]
 hugetlb_vm_op_close+0x5c8/0x720 mm/hugetlb.c:4740
 vma_close mm/internal.h:190 [inline]
 remove_vma+0x88/0x160 mm/vma.c:458
 exit_mmap+0x507/0xb60 mm/mmap.c:1302
 __mmput+0x12a/0x410 kernel/fork.c:1173
 mmput+0x62/0x70 kernel/fork.c:1196
 exit_mm kernel/exit.c:581 [inline]
 do_exit+0x7d7/0x2bd0 kernel/exit.c:959
 do_group_exit+0xd3/0x2a0 kernel/exit.c:1112
 get_signal+0x2671/0x26d0 kernel/signal.c:3034
 arch_do_signal_or_restart+0x8f/0x7e0 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
 exit_to_user_mode_loop+0x8c/0x540 kernel/entry/common.c:75
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
 ret_from_fork+0x79d/0xb10 arch/x86/kernel/process.c:167
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:resv_map_release mm/hugetlb.c:1162 [inline]
RIP: 0010:resv_map_release+0x1e2/0x280 mm/hugetlb.c:1147
Code: ac 9c ff 48 85 db 75 1c e8 1b b2 9c ff 48 8b 3c 24 48 83 c4 10 5b 5d 41 5c 41 5d 41 5e 41 5f e9 24 c8 fa ff e8 ff b1 9c ff 90 <0f> 0b 4c 89 f7 e8 64 88 06 00 e9 38 ff ff ff 48 89 ef e8 67 87 06
RSP: 0018:ffffc90005eef848 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff8222368b
RDX: ffff888012c4c980 RSI: ffffffff822236b1 RDI: 0000000000000007
RBP: ffff888033ff5c60 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000001 R11: ffff888012c4d4b0 R12: ffff888033ff5c60
R13: ffff888033ff5c60 R14: ffff888033ff5c60 R15: ffff8880540c6888
FS:  0000000000000000(0000) GS:ffff8880d6af5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f13019b6ad8 CR3: 0000000032637000 CR4: 0000000000352ef0