------------[ cut here ]------------
kernel BUG at [] mm/page_table_check.c:118!
Kernel BUG [#1]
Modules linked in:
CPU: 0 UID: 0 PID: 10072 Comm: syz.5.841 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 : ffff8f8002bb71d0
 gp : ffffffff8a22a0c0 tp : ffffaf8033a71a80 t0 : ffff8f8002bb7758
 t1 : fffff5ef02802809 t2 : ffffffff80aa0a98 s0 : ffff8f8002bb7250
 s1 : 0000000000000001 a0 : 0000000000000001 a1 : 0000000000000000
 a2 : 0000000000080000 a3 : ffffffff80c4d300 a4 : ffff8f800e6cdee0
 a5 : 000000000002cee0 a6 : 0000000000000003 a7 : ffffaf801401404b
 s2 : 00000000000c0400 s3 : 0000000000000000 s4 : ffffaf8014014000
 s5 : 0000000000000200 s6 : 0000000000000001 s7 : dfffffff00000000
 s8 : 0000000000007fff s9 : ffffffff88a44e80 s10: 0000000000000000
 s11: ffffffff8a347d80 t3 : 0000000000000001 t4 : fffff5ef02802809
 t5 : fffff5ef0280280a 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
[<ffffffff80a9848a>] vms_gather_munmap_vmas+0x1c2/0x143c mm/vma.c:1408
[<ffffffff80aa0cd8>] do_vmi_align_munmap+0x240/0x6d8 mm/vma.c:1576
[<ffffffff80aa133e>] do_vmi_munmap+0x1ce/0x3bc mm/vma.c:1633
[<ffffffff80aa6ff6>] __vm_munmap+0x192/0x34c mm/vma.c:3254
[<ffffffff80a28ff2>] __do_sys_munmap mm/mmap.c:1078 [inline]
[<ffffffff80a28ff2>] __se_sys_munmap mm/mmap.c:1075 [inline]
[<ffffffff80a28ff2>] __riscv_sys_munmap+0x66/0x154 mm/mmap.c:1075
[<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