------------[ cut here ]------------
kernel BUG at [] mm/page_table_check.c:118!
Kernel BUG [#1]
Modules linked in:
CPU: 1 UID: 0 PID: 3971 Comm: syz.0.48 Not tainted syzkaller #0 PREEMPT 
Hardware name: riscv-virtio,qemu (DT)
epc : page_table_check_set+0x912/0xb98 mm/page_table_check.c:118
 ra : page_table_check_set+0x912/0xb98 mm/page_table_check.c:118
epc : ffffffff80c9d55e ra : ffffffff80c9d55e sp : ffff8f800af17020
 gp : ffffffff8aedd320 tp : ffffaf801cf18000 t0 : ffff8f800af175b8
 t1 : fffff5ef028bc009 t2 : ffffffff86a06d80 s0 : ffff8f800af170a0
 s1 : 0000000000000001 a0 : 0000000000000001 a1 : 0000000000000000
 a2 : 0000000000080000 a3 : ffffffff80c9d55e a4 : ffff8f8004651920
 a5 : 0000000000027920 a6 : 0000000000000003 a7 : ffffaf80145e004b
 s2 : 00000000000b6000 s3 : 0000000000000000 s4 : ffffaf80145e0000
 s5 : 0000000000000200 s6 : 0000000000000001 s7 : dfffffff00000000
 s8 : ffffffff8966e0c0 s9 : 0000000000007fff s10: 0000000000000000
 s11: ffffffff8affc3a0 t3 : 00000000000000c8 t4 : fffff5ef028bc009
 t5 : fffff5ef028bc00a t6 : 0000000000000002 ssp : 0000000000000000
status: 0000000200000120 badaddr: ffffffff80c9d55e cause: 0000000000000003
[<ffffffff80c9d55e>] page_table_check_set+0x912/0xb98 mm/page_table_check.c:118
[<ffffffff80c9dc84>] __page_table_check_ptes_set+0x23c/0x4a4 mm/page_table_check.c:223
[<ffffffff80c28b72>] page_table_check_ptes_set include/linux/page_table_check.h:83 [inline]
[<ffffffff80c28b72>] set_ptes arch/riscv/include/asm/pgtable.h:642 [inline]
[<ffffffff80c28b72>] __split_huge_pmd_locked mm/huge_memory.c:3458 [inline]
[<ffffffff80c28b72>] split_huge_pmd_locked+0x1e96/0x22e0 mm/huge_memory.c:3476
[<ffffffff80c29160>] __split_huge_pmd+0x1a4/0x2aa mm/huge_memory.c:3490
[<ffffffff80c2b9c8>] split_huge_pmd_address mm/huge_memory.c:3503 [inline]
[<ffffffff80c2b9c8>] split_huge_pmd_if_needed mm/huge_memory.c:3515 [inline]
[<ffffffff80c2b9c8>] split_huge_pmd_if_needed mm/huge_memory.c:3506 [inline]
[<ffffffff80c2b9c8>] vma_adjust_trans_huge+0x272/0x4b2 mm/huge_memory.c:3527
[<ffffffff80af9fc4>] __split_vma+0xbc2/0x1db8 mm/vma.c:601
[<ffffffff80afd30a>] split_vma mm/vma.c:643 [inline]
[<ffffffff80afd30a>] vma_modify+0xc8e/0x21be mm/vma.c:1779
[<ffffffff80b05242>] vma_modify_flags+0x278/0x3a4 mm/vma.c:1799
[<ffffffff80a9fb18>] mprotect_fixup+0x1c8/0xa56 mm/mprotect.c:824
[<ffffffff80aa0a06>] do_mprotect_pkey.constprop.0+0x660/0xb1c mm/mprotect.c:1002
[<ffffffff80aa0f2e>] __do_sys_mprotect mm/mprotect.c:1023 [inline]
[<ffffffff80aa0f2e>] __se_sys_mprotect mm/mprotect.c:1020 [inline]
[<ffffffff80aa0f2e>] __riscv_sys_mprotect+0x6c/0x1b2 mm/mprotect.c:1020
[<ffffffff8007bc50>] syscall_handler+0x92/0x114 arch/riscv/include/asm/syscall.h:112
[<ffffffff86593182>] do_trap_ecall_u+0x4ca/0x658 arch/riscv/kernel/traps.c:341
[<ffffffff865bfadc>] handle_exception+0x168/0x174 arch/riscv/kernel/entry.S:237
Code: 8097 ff89 80e7 2bc0 8ce3 bc04 8097 ff89 80e7 7ba0 (9002) 8097 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	ff898097          	auipc	ra,0xff898
   4:	2bc080e7          	jalr	700(ra) # 0xff8982bc
   8:	bc048ce3          	beqz	s1,0xfffffffffffffbe0
   c:	ff898097          	auipc	ra,0xff898
  10:	7ba080e7          	jalr	1978(ra) # 0xff8987c6
* 14:	9002                	ebreak <-- trapping instruction
  16:	9780                	.short	0x8097