------------[ cut here ]------------
kernel BUG at [] mm/page_table_check.c:118!
Kernel BUG [#1]
Modules linked in:
CPU: 1 UID: 0 PID: 4331 Comm: syz.1.138 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: riscv-virtio,qemu (DT)
epc : page_table_check_set+0x9ca/0xc72 mm/page_table_check.c:118
 ra : page_table_check_set+0x9ca/0xc72 mm/page_table_check.c:118
epc : ffffffff80c81304 ra : ffffffff80c81304 sp : ffff8f8003ec6fd0
 gp : ffffffff8a49fe80 tp : ffffaf801afdb580 t0 : ffffaf801e81e9f0
 t1 : fffff5ef027aa809 t2 : ffffffff80a99754 s0 : ffff8f8003ec7050
 s1 : 0000000000000001 a0 : 0000000000000001 a1 : 0000000000000000
 a2 : 0000000000080000 a3 : ffffffff80c81304 a4 : ffff8f80055b7798
 a5 : 000000000006a798 a6 : 0000000000000003 a7 : ffffaf8013d5404b
 s2 : 00000000000b4400 s3 : 0000000000000000 s4 : ffffaf8013d54000
 s5 : 0000000000000200 s6 : 0000000000000001 s7 : dfffffff00000000
 s8 : ffffffff88c5a680 s9 : 0000000000007fff s10: 0000000000000000
 s11: ffffffff8a5bece0 t3 : 0000000000000001 t4 : fffff5ef027aa809
 t5 : fffff5ef027aa80a t6 : 0000000000000002 ssp : 0000000000000000
status: 0000000200000120 badaddr: ffffffff80c81304 cause: 0000000000000003
[<ffffffff80c81304>] page_table_check_set+0x9ca/0xc72 mm/page_table_check.c:118
[<ffffffff80c81a74>] __page_table_check_ptes_set+0x264/0x47c mm/page_table_check.c:212
[<ffffffff80c0a116>] page_table_check_ptes_set include/linux/page_table_check.h:83 [inline]
[<ffffffff80c0a116>] set_ptes arch/riscv/include/asm/pgtable.h:645 [inline]
[<ffffffff80c0a116>] __split_huge_pmd_locked mm/huge_memory.c:3300 [inline]
[<ffffffff80c0a116>] split_huge_pmd_locked+0x1eb2/0x23f0 mm/huge_memory.c:3318
[<ffffffff80c0a8fe>] __split_huge_pmd+0x2aa/0x3d4 mm/huge_memory.c:3332
[<ffffffff80a7ea7c>] move_page_tables+0x9f6/0x3cc4 mm/mremap.c:858
[<ffffffff80a81f80>] copy_vma_and_data+0x236/0x692 mm/mremap.c:1282
[<ffffffff80a828dc>] move_vma+0x500/0x16d6 mm/mremap.c:1362
[<ffffffff80a83cce>] mremap_to+0x21c/0x474 mm/mremap.c:1486
[<ffffffff80a8461e>] remap_move mm/mremap.c:1943 [inline]
[<ffffffff80a8461e>] do_mremap mm/mremap.c:1991 [inline]
[<ffffffff80a8461e>] __do_sys_mremap+0x6f8/0x16ca mm/mremap.c:2055
[<ffffffff80a85690>] __se_sys_mremap mm/mremap.c:2023 [inline]
[<ffffffff80a85690>] __riscv_sys_mremap+0xa0/0x124 mm/mremap.c:2023
[<ffffffff80078f0c>] syscall_handler+0x92/0x114 arch/riscv/include/asm/syscall.h:112
[<ffffffff864f9938>] do_trap_ecall_u+0x3e4/0x636 arch/riscv/kernel/traps.c:342
[<ffffffff86525b34>] handle_exception+0x168/0x174 arch/riscv/kernel/entry.S:237
Code: c097 ff8a 80e7 37a0 82e3 e404 d097 ff8a 80e7 8780 (9002) d097 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	ff8ac097          	auipc	ra,0xff8ac
   4:	37a080e7          	jalr	890(ra) # 0xff8ac37a
   8:	e40482e3          	beqz	s1,0xfffffffffffffe4c
   c:	ff8ad097          	auipc	ra,0xff8ad
  10:	878080e7          	jalr	-1928(ra) # 0xff8ac884
* 14:	9002                	ebreak <-- trapping instruction
  16:	97d0                	.short	0xd097