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kernel BUG at [] mm/page_table_check.c:142!
Kernel BUG [#1]
Modules linked in:
CPU: 0 UID: 0 PID: 4376 Comm: syz.1.112 Not tainted syzkaller #0 PREEMPT 
Hardware name: riscv-virtio,qemu (DT)
epc : __page_table_check_zero+0x396/0x544 mm/page_table_check.c:142
 ra : __page_table_check_zero+0x396/0x544 mm/page_table_check.c:142
epc : ffffffff80c4e452 ra : ffffffff80c4e452 sp : ffff8f800bd56650
 gp : ffffffff8a22a0c0 tp : ffffaf801d731a80 t0 : ffffffff80b01846
 t1 : fffff5ef0272e409 t2 : ffffffff80a46f56 s0 : ffff8f800bd566c0
 s1 : ffffaf8013972048 a0 : 0000000000000005 a1 : 0000000000000000
 a2 : 0000000000080000 a3 : ffffffff80c4e452 a4 : ffff8f8004b7a000
 a5 : 0000000000080000 a6 : 0000000000000003 a7 : ffffaf801397204b
 s2 : 0000000000000001 s3 : 0000000000000000 s4 : ffffaf8013972000
 s5 : dfffffff00000000 s6 : 00000000000b4a00 s7 : 0000000000000001
 s8 : 0000000000000000 s9 : 0000000000007fff s10: fffffffef1468fb0
 s11: ffffffff8a347d80 t3 : 0000000000000001 t4 : fffff5ef0272e409
 t5 : fffff5ef0272e40a t6 : 0000000000000002 ssp : 0000000000000000
status: 0000000200000120 badaddr: ffffffff80c4e452 cause: 0000000000000003
[<ffffffff80c4e452>] __page_table_check_zero+0x396/0x544 mm/page_table_check.c:142
[<ffffffff80ac124c>] page_table_check_free include/linux/page_table_check.h:46 [inline]
[<ffffffff80ac124c>] __free_pages_prepare mm/page_alloc.c:1434 [inline]
[<ffffffff80ac124c>] free_unref_folios+0xa58/0x1ef4 mm/page_alloc.c:3040
[<ffffffff809158c4>] shrink_folio_list+0x2878/0x4d78 mm/vmscan.c:1610
[<ffffffff80917eca>] reclaim_folio_list+0x106/0x8ec mm/vmscan.c:2205
[<ffffffff80928482>] reclaim_pages+0x33e/0x4b8 mm/vmscan.c:2242
[<ffffffff80afc2fa>] madvise_cold_or_pageout_pte_range+0x16de/0x2408 mm/madvise.c:442
[<ffffffff80a46f56>] walk_pmd_range mm/pagewalk.c:130 [inline]
[<ffffffff80a46f56>] walk_pud_range mm/pagewalk.c:224 [inline]
[<ffffffff80a46f56>] walk_p4d_range mm/pagewalk.c:262 [inline]
[<ffffffff80a46f56>] walk_pgd_range+0xcc6/0x1f84 mm/pagewalk.c:303
[<ffffffff80a4834c>] __walk_page_range+0x138/0x7a8 mm/pagewalk.c:411
[<ffffffff80a49b80>] walk_page_range_vma_unsafe+0x1ec/0x82c mm/pagewalk.c:715
[<ffffffff80a4a21a>] walk_page_range_vma+0x5a/0x84 mm/pagewalk.c:725
[<ffffffff80af6872>] madvise_pageout_page_range mm/madvise.c:620 [inline]
[<ffffffff80af6872>] madvise_pageout+0x236/0x794 mm/madvise.c:645
[<ffffffff80afdf6a>] madvise_vma_behavior+0xeb2/0x2ae4 mm/madvise.c:1364
[<ffffffff80affdd6>] madvise_walk_vmas+0x23a/0x978 mm/madvise.c:1719
[<ffffffff80b006fe>] madvise_do_behavior+0x1ea/0x5c0 mm/madvise.c:1935
[<ffffffff80b01846>] do_madvise+0x18a/0x22c mm/madvise.c:2028
[<ffffffff80b01970>] __do_sys_madvise mm/madvise.c:2037 [inline]
[<ffffffff80b01970>] __se_sys_madvise mm/madvise.c:2035 [inline]
[<ffffffff80b01970>] __riscv_sys_madvise+0x88/0xdc mm/madvise.c:2035
[<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: 4b00 8526 c0ef e7bf 8a2a b791 d097 ff8c 80e7 49e0 (9002) d097 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	4b00                	lw	s0,16(a4)
   2:	8526                	mv	a0,s1
   4:	e7bfc0ef          	jal	0xffffffffffffce7e
   8:	8a2a                	mv	s4,a0
   a:	b791                	j	0xffffffffffffff4e
   c:	ff8cd097          	auipc	ra,0xff8cd
  10:	49e080e7          	jalr	1182(ra) # 0xff8cd4aa
* 14:	9002                	ebreak <-- trapping instruction
  16:	97d0                	.short	0xd097