------------[ cut here ]------------
kernel BUG at [] mm/page_table_check.c:118!
Kernel BUG [#1]
Modules linked in:
CPU: 0 UID: 0 PID: 3991 Comm: syz.0.43 Not tainted syzkaller #0 PREEMPT 
Hardware name: riscv-virtio,qemu (DT)
epc : page_table_check_set+0xa74/0xd30 mm/page_table_check.c:118
 ra : page_table_check_set+0xa74/0xd30 mm/page_table_check.c:118
epc : ffffffff80c4d300 ra : ffffffff80c4d300 sp : ffff8f800a727160
 gp : ffffffff8a22a0c0 tp : ffffaf801cadcf80 t0 : ffff8f800a7276f8
 t1 : fffff5ef02728009 t2 : ffffffff86a069b0 s0 : ffff8f800a7271e0
 s1 : 0000000000000001 a0 : 0000000000000001 a1 : 0000000000000000
 a2 : 0000000000080000 a3 : ffffffff80c4d300 a4 : ffff8f8004a39b88
 a5 : 000000000002fb88 a6 : 0000000000000003 a7 : ffffaf801394004b
 s2 : 00000000000b4000 s3 : 0000000000000000 s4 : ffffaf8013940000
 s5 : 0000000000000200 s6 : 0000000000000001 s7 : dfffffff00000000
 s8 : 0000000000007fff s9 : ffffffff88a44e80 s10: 0000000000000000
 s11: ffffffff8a347d80 t3 : 0000000000000001 t4 : fffff5ef02728009
 t5 : fffff5ef0272800a t6 : 0000000000000002 ssp : 0000000000000000
status: 0000000200000120 badaddr: ffffffff80c4d300 cause: 0000000000000003
[<ffffffff80c4d300>] page_table_check_set+0xa74/0xd30 mm/page_table_check.c:118
[<ffffffff80c4da84>] __page_table_check_ptes_set+0x264/0x47c mm/page_table_check.c:215
[<ffffffff80bd6c5c>] page_table_check_ptes_set include/linux/page_table_check.h:83 [inline]
[<ffffffff80bd6c5c>] set_ptes arch/riscv/include/asm/pgtable.h:625 [inline]
[<ffffffff80bd6c5c>] __split_huge_pmd_locked mm/huge_memory.c:3256 [inline]
[<ffffffff80bd6c5c>] split_huge_pmd_locked+0x2b08/0x3268 mm/huge_memory.c:3274
[<ffffffff80bd7676>] __split_huge_pmd+0x2ba/0x3e4 mm/huge_memory.c:3288
[<ffffffff80bda896>] split_huge_pmd_address mm/huge_memory.c:3301 [inline]
[<ffffffff80bda896>] split_huge_pmd_if_needed mm/huge_memory.c:3313 [inline]
[<ffffffff80bda896>] split_huge_pmd_if_needed mm/huge_memory.c:3304 [inline]
[<ffffffff80bda896>] vma_adjust_trans_huge+0x15a/0x49c mm/huge_memory.c:3325
[<ffffffff80a97d30>] __split_vma+0x978/0xf10 mm/vma.c:554
[<ffffffff80a9a700>] split_vma mm/vma.c:596 [inline]
[<ffffffff80a9a700>] vma_modify+0xffc/0x1fa8 mm/vma.c:1680
[<ffffffff80aa174c>] vma_modify_flags+0x220/0x32c mm/vma.c:1700
[<ffffffff80a36446>] mprotect_fixup+0x18a/0x938 mm/mprotect.c:756
[<ffffffff80a372aa>] do_mprotect_pkey.constprop.0+0x6b6/0xb14 mm/mprotect.c:930
[<ffffffff80a37774>] __do_sys_mprotect mm/mprotect.c:951 [inline]
[<ffffffff80a37774>] __se_sys_mprotect mm/mprotect.c:948 [inline]
[<ffffffff80a37774>] __riscv_sys_mprotect+0x6c/0xf8 mm/mprotect.c:948
[<ffffffff80077f1e>] syscall_handler+0x92/0x114 arch/riscv/include/asm/syscall.h:112
[<ffffffff8642fdbe>] do_trap_ecall_u+0x402/0x680 arch/riscv/kernel/traps.c:342
[<ffffffff8645a152>] handle_exception+0x15e/0x16a arch/riscv/kernel/entry.S:232
Code: e097 ff8c 80e7 11c0 81e3 e004 e097 ff8c 80e7 5f00 (9002) e097 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	ff8ce097          	auipc	ra,0xff8ce
   4:	11c080e7          	jalr	284(ra) # 0xff8ce11c
   8:	e00481e3          	beqz	s1,0xfffffffffffffe0a
   c:	ff8ce097          	auipc	ra,0xff8ce
  10:	5f0080e7          	jalr	1520(ra) # 0xff8ce5fc
* 14:	9002                	ebreak <-- trapping instruction
  16:	97e0                	.short	0xe097