syzbot

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kernel BUG at [] mm/page_table_check.c:118!
Kernel BUG [#1]
Modules linked in:
CPU: 0 UID: 0 PID: 5160 Comm: syz.1.521 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 : ffffffff80c4d232 ra : ffffffff80c4d232 sp : ffff8f80034461d0
 gp : ffffffff8a2739a0 tp : ffffaf8013284f80 t0 : 0000000000000000
 t1 : fffff5ef0278a009 t2 : ffffffff9164ab88 s0 : ffff8f8003446250
 s1 : 0000000000000001 a0 : 0000000000000001 a1 : 0000000000000000
 a2 : 0000000000080000 a3 : ffffffff80c4d232 a4 : ffff8f8004ae9c40
 a5 : 00000000000adc40 a6 : 0000000000000003 a7 : ffffaf8013c5004b
 s2 : 00000000000b9000 s3 : 0000000000000000 s4 : ffffaf8013c50000
 s5 : 0000000000000001 s6 : 0000000000000001 s7 : dfffffff00000000
 s8 : 0000000000007fff s9 : ffffffff88a4b000 s10: 0000000000000000
 s11: ffffffff8a390ba0 t3 : 0000000000000001 t4 : fffff5ef0278a009
 t5 : fffff5ef0278a00a t6 : 0000000000000002 ssp : 0000000000000000
status: 0000000200000120 badaddr: ffffffff80c4d232 cause: 0000000000000003
[<ffffffff80c4d232>] page_table_check_set+0x996/0xc38 mm/page_table_check.c:118
[<ffffffff80c4d99c>] __page_table_check_ptes_set+0x264/0x47c mm/page_table_check.c:212
[<ffffffff80bb50b8>] page_table_check_ptes_set include/linux/page_table_check.h:83 [inline]
[<ffffffff80bb50b8>] set_ptes arch/riscv/include/asm/pgtable.h:635 [inline]
[<ffffffff80bb50b8>] remove_migration_pte+0x1038/0x2148 mm/migrate.c:436
[<ffffffff80a68b76>] rmap_walk_anon+0x30e/0x690 mm/rmap.c:2999
[<ffffffff80a81866>] rmap_walk_locked+0xa6/0xcc mm/rmap.c:3115
[<ffffffff80bbeb42>] remove_migration_ptes+0x18a/0x1bc mm/migrate.c:471
[<ffffffff80bddaa0>] remap_page mm/huge_memory.c:3540 [inline]
[<ffffffff80bddaa0>] __folio_split+0xce8/0x1410 mm/huge_memory.c:4180
[<ffffffff80be1b80>] __split_huge_page_to_list_to_order mm/huge_memory.c:4311 [inline]
[<ffffffff80be1b80>] split_huge_page_to_list_to_order include/linux/huge_mm.h:385 [inline]
[<ffffffff80be1b80>] split_folio_to_list+0x4c/0x60 mm/huge_memory.c:4375
[<ffffffff80935978>] shrink_folio_list+0x21d8/0x4dfc mm/vmscan.c:1287
[<ffffffff809386a2>] reclaim_folio_list+0x106/0x8d8 mm/vmscan.c:2171
[<ffffffff80948b0e>] reclaim_pages+0x33e/0x4b8 mm/vmscan.c:2208
[<ffffffff80b0e370>] madvise_cold_or_pageout_pte_range+0x1b40/0x236c mm/madvise.c:444
[<ffffffff80a5e922>] walk_pmd_range mm/pagewalk.c:148 [inline]
[<ffffffff80a5e922>] walk_pud_range mm/pagewalk.c:239 [inline]
[<ffffffff80a5e922>] walk_p4d_range mm/pagewalk.c:280 [inline]
[<ffffffff80a5e922>] walk_pgd_range+0xd12/0x1ecc mm/pagewalk.c:321
[<ffffffff80a5fc14>] __walk_page_range+0x138/0x7a8 mm/pagewalk.c:429
[<ffffffff80a61448>] walk_page_range_vma_unsafe+0x1ec/0x82c mm/pagewalk.c:733
[<ffffffff80a61ae2>] walk_page_range_vma+0x5a/0x84 mm/pagewalk.c:743
[<ffffffff80b085d2>] madvise_pageout_page_range mm/madvise.c:622 [inline]
[<ffffffff80b085d2>] madvise_pageout+0x236/0x794 mm/madvise.c:647
[<ffffffff80b0fefe>] madvise_vma_behavior+0x726/0x1ea8 mm/madvise.c:1358
[<ffffffff80b118ba>] madvise_walk_vmas+0x23a/0x978 mm/madvise.c:1713
[<ffffffff80b121e2>] madvise_do_behavior+0x1ea/0x5c0 mm/madvise.c:1929
[<ffffffff80b1332a>] do_madvise+0x18a/0x22c mm/madvise.c:2022
[<ffffffff80b13454>] __do_sys_madvise mm/madvise.c:2031 [inline]
[<ffffffff80b13454>] __se_sys_madvise mm/madvise.c:2029 [inline]
[<ffffffff80b13454>] __riscv_sys_madvise+0x88/0xdc mm/madvise.c:2029
[<ffffffff80078f3a>] syscall_handler+0x92/0x114 arch/riscv/include/asm/syscall.h:112
[<ffffffff86469768>] do_trap_ecall_u+0x3e4/0x638 arch/riscv/kernel/traps.c:342
[<ffffffff86494da4>] handle_exception+0x168/0x174 arch/riscv/kernel/entry.S:237
Code: 1097 ff8d 80e7 8d20 83e3 e004 1097 ff8d 80e7 da60 (9002) 1097 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	ff8d1097          	auipc	ra,0xff8d1
   4:	8d2080e7          	jalr	-1838(ra) # 0xff8d08d2
   8:	e00483e3          	beqz	s1,0xfffffffffffffe0e
   c:	ff8d1097          	auipc	ra,0xff8d1
  10:	da6080e7          	jalr	-602(ra) # 0xff8d0db2
* 14:	9002                	ebreak <-- trapping instruction
  16:	9710                	.short	0x1097