syzbot

BUG: Bad page map in process syz-fuzzer  pte:ffffffff801110d3 pmd:231e6c01
addr:00007fff81ff5000 vm_flags:00100073 anon_vma:ffffaf800b744500 mapping:0000000000000000 index:7fff81ff5
file:(null) fault:0x0 mmap:0x0 readpage:0x0
CPU: 1 PID: 2020 Comm: syz-fuzzer Not tainted 5.17.0-rc1-syzkaller-00002-g0966d385830d #0
Hardware name: riscv-virtio,qemu (DT)
Call Trace:
[<ffffffff8000a228>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:113
[<ffffffff831668cc>] show_stack+0x34/0x40 arch/riscv/kernel/stacktrace.c:119
[<ffffffff831756ba>] __dump_stack lib/dump_stack.c:88 [inline]
[<ffffffff831756ba>] dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:106
[<ffffffff83175742>] dump_stack+0x1c/0x24 lib/dump_stack.c:113
[<ffffffff803cdcdc>] print_bad_pte+0x3d4/0x4a0 mm/memory.c:563
[<ffffffff803d1622>] vm_normal_page+0x20c/0x22a mm/memory.c:626
[<ffffffff803d8088>] do_numa_page mm/memory.c:4367 [inline]
[<ffffffff803d8088>] handle_pte_fault mm/memory.c:4577 [inline]
[<ffffffff803d8088>] __handle_mm_fault+0xdc8/0x23a4 mm/memory.c:4705
[<ffffffff803d98fa>] handle_mm_fault+0x296/0x674 mm/memory.c:4803
[<ffffffff8001188e>] do_page_fault+0x308/0xa3c arch/riscv/mm/fault.c:323
[<ffffffff80005724>] ret_from_exception+0x0/0x10