------------[ cut here ]------------
kernel BUG at [] mm/page_table_check.c:118!
Kernel BUG [#1]
Modules linked in:
CPU: 1 UID: 0 PID: 3919 Comm: syz.1.11 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
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 : ffffffff80c6978e ra : ffffffff80c6978e sp : ffff8f800a1e6c80
 gp : ffffffff8a24e5c0 tp : ffffaf801c4e1ac0 t0 : fffff5ef063fb400
 t1 : fffff5ef02721c09 t2 : ffffffff80a40416 s0 : ffff8f800a1e6d00
 s1 : 0000000000000001 a0 : 0000000000000001 a1 : 0000000000000000
 a2 : 0000000000080000 a3 : ffffffff80c6978e a4 : ffff8f8004a66560
 a5 : 000000000009c560 a6 : 0000000000000003 a7 : ffffaf801390e04b
 s2 : 00000000000b3600 s3 : 0000000000000000 s4 : ffffaf801390e000
 s5 : 0000000000000200 s6 : 0000000000000001 s7 : dfffffff00000000
 s8 : 0000000000007fff s9 : ffffffff88a50700 s10: 0000000000000000
 s11: ffffffff8a36bc60 t3 : 0000000000000001 t4 : fffff5ef02721c09
 t5 : fffff5ef02721c0a t6 : 0000000000000002 ssp : 0000000000000000
status: 0000000200000120 badaddr: ffffffff80c6978e cause: 0000000000000003
[<ffffffff80c6978e>] page_table_check_set+0x996/0xc38 mm/page_table_check.c:118
[<ffffffff80c69ef8>] __page_table_check_ptes_set+0x264/0x47c mm/page_table_check.c:212
[<ffffffff80bf52a6>] page_table_check_ptes_set include/linux/page_table_check.h:83 [inline]
[<ffffffff80bf52a6>] set_ptes arch/riscv/include/asm/pgtable.h:625 [inline]
[<ffffffff80bf52a6>] __split_huge_pmd_locked mm/huge_memory.c:3358 [inline]
[<ffffffff80bf52a6>] split_huge_pmd_locked+0x1e2a/0x2388 mm/huge_memory.c:3376
[<ffffffff80bf5aae>] __split_huge_pmd+0x2aa/0x3d4 mm/huge_memory.c:3390
[<ffffffff80bf7a42>] copy_huge_pmd+0x1e6a/0x2300 mm/huge_memory.c:2009
[<ffffffff80a311e8>] copy_pmd_range mm/memory.c:1382 [inline]
[<ffffffff80a311e8>] copy_pud_range mm/memory.c:1429 [inline]
[<ffffffff80a311e8>] copy_p4d_range mm/memory.c:1453 [inline]
[<ffffffff80a311e8>] copy_page_range+0xd7c/0x541c mm/memory.c:1539
[<ffffffff80a585e8>] dup_mmap+0xd18/0x2168 mm/mmap.c:1840
[<ffffffff80147a84>] dup_mm kernel/fork.c:1534 [inline]
[<ffffffff80147a84>] copy_mm kernel/fork.c:1586 [inline]
[<ffffffff80147a84>] copy_process+0x46d8/0x7cbc kernel/fork.c:2264
[<ffffffff8014b2c4>] kernel_clone+0x154/0xf6c kernel/fork.c:2721
[<ffffffff8014c1da>] __do_sys_clone+0xfe/0x140 kernel/fork.c:2862
[<ffffffff8014c978>] __se_sys_clone kernel/fork.c:2830 [inline]
[<ffffffff8014c978>] __riscv_sys_clone+0xa0/0x110 kernel/fork.c:2830
[<ffffffff80078f3a>] syscall_handler+0x92/0x114 arch/riscv/include/asm/syscall.h:112
[<ffffffff86482108>] do_trap_ecall_u+0x3dc/0x61c arch/riscv/kernel/traps.c:342
[<ffffffff864ad412>] handle_exception+0x15e/0x16a arch/riscv/kernel/entry.S:232
Code: 8097 ff8c 80e7 b9a0 83e3 e004 8097 ff8c 80e7 06e0 (9002) 8097 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	ff8c8097          	auipc	ra,0xff8c8
   4:	b9a080e7          	jalr	-1126(ra) # 0xff8c7b9a
   8:	e00483e3          	beqz	s1,0xfffffffffffffe0e
   c:	ff8c8097          	auipc	ra,0xff8c8
  10:	06e080e7          	jalr	110(ra) # 0xff8c807a
* 14:	9002                	ebreak <-- trapping instruction
  16:	9780                	.short	0x8097