------------[ cut here ]------------
kernel BUG at [] mm/page_table_check.c:118!
Kernel BUG [#1]
Modules linked in:
CPU: 0 UID: 0 PID: 4951 Comm: syz.1.381 Tainted: G        W    L      syzkaller #0 PREEMPT 
Tainted: [W]=WARN, [L]=SOFTLOCKUP
Hardware name: riscv-virtio,qemu (DT)
epc : page_table_check_set+0x996/0xc38 mm/page_table_check.c:118
 ra : page_table_check_set+0x996/0xc38 mm/page_table_check.c:118
epc : ffffffff80c4d33e ra : ffffffff80c4d33e sp : ffff8f8001c06c90
 gp : ffffffff8a2739c0 tp : ffffaf801ab3b500 t0 : 0000000000000000
 t1 : fffff5ef02732009 t2 : ffffffff9164ab80 s0 : ffff8f8001c06d10
 s1 : 0000000000000001 a0 : 0000000000000001 a1 : 0000000000000000
 a2 : 0000000000080000 a3 : ffffffff80c4d33e a4 : ffff8f8004afdea0
 a5 : 0000000000093ea0 a6 : 0000000000000003 a7 : ffffaf801399004b
 s2 : 00000000000b5000 s3 : 0000000000000000 s4 : ffffaf8013990000
 s5 : 0000000000000200 s6 : 0000000000000001 s7 : dfffffff00000000
 s8 : 0000000000007fff s9 : ffffffff88a4b000 s10: 0000000000000000
 s11: ffffffff8a390be0 t3 : 0000000000000001 t4 : fffff5ef02732009
 t5 : fffff5ef0273200a t6 : 0000000000000002 ssp : 0000000000000000
status: 0000000200000120 badaddr: ffffffff80c4d33e cause: 0000000000000003
[<ffffffff80c4d33e>] page_table_check_set+0x996/0xc38 mm/page_table_check.c:118
[<ffffffff80c4daa8>] __page_table_check_ptes_set+0x264/0x47c mm/page_table_check.c:212
[<ffffffff80bd8f06>] page_table_check_ptes_set include/linux/page_table_check.h:83 [inline]
[<ffffffff80bd8f06>] set_ptes arch/riscv/include/asm/pgtable.h:625 [inline]
[<ffffffff80bd8f06>] __split_huge_pmd_locked mm/huge_memory.c:3358 [inline]
[<ffffffff80bd8f06>] split_huge_pmd_locked+0x1e2a/0x2388 mm/huge_memory.c:3376
[<ffffffff80bd970e>] __split_huge_pmd+0x2aa/0x3d4 mm/huge_memory.c:3390
[<ffffffff80bdb580>] copy_huge_pmd+0x1d48/0x2264 mm/huge_memory.c:2009
[<ffffffff80a1e7d0>] copy_pmd_range mm/memory.c:1382 [inline]
[<ffffffff80a1e7d0>] copy_pud_range mm/memory.c:1429 [inline]
[<ffffffff80a1e7d0>] copy_p4d_range mm/memory.c:1453 [inline]
[<ffffffff80a1e7d0>] copy_page_range+0xd7c/0x541c mm/memory.c:1539
[<ffffffff80a44c84>] dup_mmap+0xd18/0x2168 mm/mmap.c:1840
[<ffffffff801486ea>] dup_mm kernel/fork.c:1534 [inline]
[<ffffffff801486ea>] copy_mm kernel/fork.c:1586 [inline]
[<ffffffff801486ea>] copy_process+0x46de/0x7d08 kernel/fork.c:2264
[<ffffffff8014bf70>] kernel_clone+0x154/0xf6c kernel/fork.c:2721
[<ffffffff8014ce86>] __do_sys_clone+0xfe/0x140 kernel/fork.c:2862
[<ffffffff8014d624>] __se_sys_clone kernel/fork.c:2830 [inline]
[<ffffffff8014d624>] __riscv_sys_clone+0xa0/0x110 kernel/fork.c:2830
[<ffffffff80078f3a>] syscall_handler+0x92/0x114 arch/riscv/include/asm/syscall.h:112
[<ffffffff86469874>] do_trap_ecall_u+0x3e4/0x638 arch/riscv/kernel/traps.c:342
[<ffffffff86494eb0>] handle_exception+0x168/0x174 arch/riscv/kernel/entry.S:232
Code: 1097 ff8d 80e7 8be0 83e3 e004 1097 ff8d 80e7 d920 (9002) 1097 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	ff8d1097          	auipc	ra,0xff8d1
   4:	8be080e7          	jalr	-1858(ra) # 0xff8d08be
   8:	e00483e3          	beqz	s1,0xfffffffffffffe0e
   c:	ff8d1097          	auipc	ra,0xff8d1
  10:	d92080e7          	jalr	-622(ra) # 0xff8d0d9e
* 14:	9002                	ebreak <-- trapping instruction
  16:	9710                	.short	0x1097