------------[ cut here ]------------
kernel BUG at [] mm/page_table_check.c:118!
Kernel BUG [#1]
Modules linked in:
CPU: 0 UID: 0 PID: 3998 Comm: syz.1.63 Tainted: G             L      syzkaller #0 PREEMPT 
Tainted: [L]=SOFTLOCKUP
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 : ffffffff80cbd16e ra : ffffffff80cbd16e sp : ffff8f800ae66fe0
 gp : ffffffff8a6d9c00 tp : ffffaf801d03d040 t0 : 0000000000000070
 t1 : fffff5ef02647409 t2 : ffffffff80acb032 s0 : ffff8f800ae67060
 s1 : 0000000000000001 a0 : 0000000000000001 a1 : 0000000000000000
 a2 : 0000000000080000 a3 : ffffffff80cbd16e a4 : ffff8f80049e0020
 a5 : 0000000000086020 a6 : 0000000000000003 a7 : ffffaf801323a04b
 s2 : 000000000009f200 s3 : 0000000000000000 s4 : ffffaf801323a000
 s5 : 0000000000000200 s6 : 0000000000000001 s7 : dfffffff00000000
 s8 : ffffffff88e6d260 s9 : 0000000000007fff s10: 0000000000000000
 s11: ffffffff8a7f9d60 t3 : 00000000000000c8 t4 : fffff5ef02647409
 t5 : fffff5ef0264740a t6 : 0000000000000002 ssp : 0000000000000000
status: 0000000200000120 badaddr: ffffffff80cbd16e cause: 0000000000000003
[<ffffffff80cbd16e>] page_table_check_set+0x9ca/0xc72 mm/page_table_check.c:118
[<ffffffff80cbd8b6>] __page_table_check_ptes_set+0x23c/0x4a4 mm/page_table_check.c:223
[<ffffffff80c43f64>] page_table_check_ptes_set include/linux/page_table_check.h:83 [inline]
[<ffffffff80c43f64>] set_ptes arch/riscv/include/asm/pgtable.h:642 [inline]
[<ffffffff80c43f64>] __split_huge_pmd_locked mm/huge_memory.c:3416 [inline]
[<ffffffff80c43f64>] split_huge_pmd_locked+0x1f00/0x241e mm/huge_memory.c:3434
[<ffffffff80c4472c>] __split_huge_pmd+0x2aa/0x3d4 mm/huge_memory.c:3448
[<ffffffff80aaf5e8>] move_page_tables+0xa06/0x3e14 mm/mremap.c:867
[<ffffffff80ab2c7c>] copy_vma_and_data+0x286/0x640 mm/mremap.c:1292
[<ffffffff80ab34ca>] move_vma+0x494/0x10d0 mm/mremap.c:1384
[<ffffffff80ab4322>] mremap_to+0x21c/0x474 mm/mremap.c:1508
[<ffffffff80ab4caa>] remap_move mm/mremap.c:1964 [inline]
[<ffffffff80ab4caa>] do_mremap mm/mremap.c:2012 [inline]
[<ffffffff80ab4caa>] __do_sys_mremap+0x730/0x1490 mm/mremap.c:2076
[<ffffffff80ab5aaa>] __se_sys_mremap mm/mremap.c:2044 [inline]
[<ffffffff80ab5aaa>] __riscv_sys_mremap+0xa0/0x15a mm/mremap.c:2044
[<ffffffff8007bd88>] syscall_handler+0x92/0x114 arch/riscv/include/asm/syscall.h:112
[<ffffffff8660e902>] do_trap_ecall_u+0x4ca/0x658 arch/riscv/kernel/traps.c:341
[<ffffffff8663b218>] handle_exception+0x168/0x174 arch/riscv/kernel/entry.S:237
Code: 3097 ff88 80e7 a900 82e3 e404 3097 ff88 80e7 f8e0 (9002) 3097 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	ff883097          	auipc	ra,0xff883
   4:	a90080e7          	jalr	-1392(ra) # 0xff882a90
   8:	e40482e3          	beqz	s1,0xfffffffffffffe4c
   c:	ff883097          	auipc	ra,0xff883
  10:	f8e080e7          	jalr	-114(ra) # 0xff882f9a
* 14:	9002                	ebreak <-- trapping instruction
  16:	9730                	.short	0x3097