Re: [syzbot] WARNING: CPU: NUM PID: NUM at mm/huge_memory.c:LINE split_huge_page_to_l

Re: [syzbot] WARNING: CPU: NUM PID: NUM at mm/huge_memory.c:LINE split_huge_page_to_l

[Aleksandr Nogikh]

#syz dup: WARNING in split_huge_page_to_list (2)

On Wed, Aug 24, 2022 at 3:02 AM syzbot
<syzbot+2184d61af7d9d86337fc@syzkaller.appspotmail.com> wrote:
>
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit:    680fb5b009e8 Merge tag 'arm64-upstream' into for-kernelci
> git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
> console output: https://syzkaller.appspot.com/x/log.txt?x=13d186a5080000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=4557ad2600fc45f4
> dashboard link: https://syzkaller.appspot.com/bug?extid=2184d61af7d9d86337fc
> compiler:       Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
> userspace arch: arm64
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=13c0bffd080000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1217ce8d080000
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+2184d61af7d9d86337fc@syzkaller.appspotmail.com
>
> raw: 05ffc00000010801 0000000000000000 dead000000000122 0000000000000000
> raw: 0000000000000000 0000000000000000 00000002ffffffff 0000000000000000
> page dumped because: VM_WARN_ON_ONCE_PAGE(is_hzp)
> ------------[ cut here ]------------
> WARNING: CPU: 0 PID: 3026 at mm/huge_memory.c:2555 split_huge_page_to_l
>
>
> ---
> This report is generated by a bot. It may contain errors.
> See https://goo.gl/tpsmEJ for more information about syzbot.
> syzbot engineers can be reached at syzkaller@googlegroups.com.
>
> syzbot will keep track of this issue. See:
> https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
> syzbot can test patches for this issue, for details see:
> https://goo.gl/tpsmEJ#testing-patches
>
> --
> You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@googlegroups.com.
> To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/0000000000007d901905e6f23c23%40google.com.