------------[ cut here ]------------
kernel BUG at [] mm/page_table_check.c:118!
Kernel BUG [#1]
Modules linked in:
CPU: 1 UID: 0 PID: 4659 Comm: syz.1.231 Not tainted syzkaller #0 PREEMPT 
Hardware name: riscv-virtio,qemu (DT)
epc : page_table_check_set+0x912/0xb98 mm/page_table_check.c:118
 ra : page_table_check_set+0x912/0xb98 mm/page_table_check.c:118
epc : ffffffff80c9d55e ra : ffffffff80c9d55e sp : ffff8f8003ca7000
 gp : ffffffff8aedd320 tp : ffffaf801ac80000 t0 : ffffaf801f9e98a0
 t1 : fffff5ef028c2409 t2 : ffffffff80abe1d4 s0 : ffff8f8003ca7080
 s1 : 0000000000000001 a0 : 0000000000000001 a1 : 0000000000000000
 a2 : 0000000000080000 a3 : ffffffff80c9d55e a4 : ffff8f8004eebcd0
 a5 : 00000000000a1cd0 a6 : 0000000000000003 a7 : ffffaf801461204b
 s2 : 00000000000b6a00 s3 : 0000000000000000 s4 : ffffaf8014612000
 s5 : 0000000000000200 s6 : 0000000000000001 s7 : dfffffff00000000
 s8 : ffffffff8966e0c0 s9 : 0000000000007fff s10: 0000000000000000
 s11: ffffffff8affc3a0 t3 : 00000000000000c8 t4 : fffff5ef028c2409
 t5 : fffff5ef028c240a t6 : 0000000000000002 ssp : 0000000000000000
status: 0000000200000120 badaddr: ffffffff80c9d55e cause: 0000000000000003
[<ffffffff80c9d55e>] page_table_check_set+0x912/0xb98 mm/page_table_check.c:118
[<ffffffff80c9dc84>] __page_table_check_ptes_set+0x23c/0x4a4 mm/page_table_check.c:223
[<ffffffff80c28b72>] page_table_check_ptes_set include/linux/page_table_check.h:83 [inline]
[<ffffffff80c28b72>] set_ptes arch/riscv/include/asm/pgtable.h:642 [inline]
[<ffffffff80c28b72>] __split_huge_pmd_locked mm/huge_memory.c:3458 [inline]
[<ffffffff80c28b72>] split_huge_pmd_locked+0x1e96/0x22e0 mm/huge_memory.c:3476
[<ffffffff80c29160>] __split_huge_pmd+0x1a4/0x2aa mm/huge_memory.c:3490
[<ffffffff80aa41ea>] move_page_tables+0xa06/0x3b72 mm/mremap.c:867
[<ffffffff80aa75dc>] copy_vma_and_data+0x286/0x640 mm/mremap.c:1292
[<ffffffff80aa7e9e>] move_vma+0x508/0x1174 mm/mremap.c:1383
[<ffffffff80aa8d26>] mremap_to+0x21c/0x474 mm/mremap.c:1507
[<ffffffff80aa9622>] remap_move mm/mremap.c:1963 [inline]
[<ffffffff80aa9622>] do_mremap mm/mremap.c:2011 [inline]
[<ffffffff80aa9622>] __do_sys_mremap+0x6a4/0x138a mm/mremap.c:2075
[<ffffffff80aaa3a8>] __se_sys_mremap mm/mremap.c:2043 [inline]
[<ffffffff80aaa3a8>] __riscv_sys_mremap+0xa0/0x1c8 mm/mremap.c:2043
[<ffffffff8007bc50>] syscall_handler+0x92/0x114 arch/riscv/include/asm/syscall.h:112
[<ffffffff86593182>] do_trap_ecall_u+0x4ca/0x658 arch/riscv/kernel/traps.c:341
[<ffffffff865bfadc>] handle_exception+0x168/0x174 arch/riscv/kernel/entry.S:237
Code: 8097 ff89 80e7 2bc0 8ce3 bc04 8097 ff89 80e7 7ba0 (9002) 8097 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	ff898097          	auipc	ra,0xff898
   4:	2bc080e7          	jalr	700(ra) # 0xff8982bc
   8:	bc048ce3          	beqz	s1,0xfffffffffffffbe0
   c:	ff898097          	auipc	ra,0xff898
  10:	7ba080e7          	jalr	1978(ra) # 0xff8987c6
* 14:	9002                	ebreak <-- trapping instruction
  16:	9780                	.short	0x8097