------------[ cut here ]------------
kernel BUG at [] mm/page_table_check.c:118!
Kernel BUG [#1]
Modules linked in:
CPU: 1 UID: 0 PID: 3923 Comm: syz.1.16 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 : ffffffff80c4d33e ra : ffffffff80c4d33e sp : ffff8f800a2f7020
 gp : ffffffff8a2739c0 tp : ffffaf801a4b4f80 t0 : ffff8f800a2f75d8
 t1 : fffff5ef02739809 t2 : ffffffff9164ab88 s0 : ffff8f800a2f70a0
 s1 : 0000000000000001 a0 : 0000000000000001 a1 : 0000000000000000
 a2 : 0000000000080000 a3 : ffffffff80c4d33e a4 : ffff8f8004624918
 a5 : 000000000003a918 a6 : 0000000000000003 a7 : ffffaf80139cc04b
 s2 : 00000000000b5c00 s3 : 0000000000000000 s4 : ffffaf80139cc000
 s5 : 0000000000000200 s6 : 0000000000000001 s7 : dfffffff00000000
 s8 : 0000000000007fff s9 : ffffffff88a4b000 s10: 0000000000000000
 s11: ffffffff8a390be0 t3 : 0000000000000001 t4 : fffff5ef02739809
 t5 : fffff5ef0273980a 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
[<ffffffff80bdbd86>] split_huge_pmd_address mm/huge_memory.c:3403 [inline]
[<ffffffff80bdbd86>] split_huge_pmd_if_needed mm/huge_memory.c:3415 [inline]
[<ffffffff80bdbd86>] split_huge_pmd_if_needed mm/huge_memory.c:3406 [inline]
[<ffffffff80bdbd86>] vma_adjust_trans_huge+0x272/0x4b4 mm/huge_memory.c:3427
[<ffffffff80aab57c>] __split_vma+0x94c/0xe40 mm/vma.c:557
[<ffffffff80aadfb8>] split_vma mm/vma.c:599 [inline]
[<ffffffff80aadfb8>] vma_modify+0x1084/0x1df0 mm/vma.c:1699
[<ffffffff80ab5460>] vma_modify_flags+0x220/0x328 mm/vma.c:1719
[<ffffffff80a4f1c0>] mprotect_fixup+0x1c8/0xa58 mm/mprotect.c:789
[<ffffffff80a50118>] do_mprotect_pkey.constprop.0+0x6c8/0xb14 mm/mprotect.c:967
[<ffffffff80a505d0>] __do_sys_mprotect mm/mprotect.c:988 [inline]
[<ffffffff80a505d0>] __se_sys_mprotect mm/mprotect.c:985 [inline]
[<ffffffff80a505d0>] __riscv_sys_mprotect+0x6c/0x100 mm/mprotect.c:985
[<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