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SubjectRe: [syzbot] kernel BUG in hugepage_add_anon_rmap
On Tue, 01 Mar 2022 05:57:27 -0800 syzbot <syzbot+d7ed29a6231d3747fb31@syzkaller.appspotmail.com> wrote:

> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: 196d330d7fb1 Add linux-next specific files for 20220222

This seems to be a relatively old kernel?

> git tree: linux-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=15b0618a700000
> kernel config: https://syzkaller.appspot.com/x/.config?x=45b71d0aea81d553
> dashboard link: https://syzkaller.appspot.com/bug?extid=d7ed29a6231d3747fb31
> compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
>
> Unfortunately, I don't have any reproducer for this issue yet.
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+d7ed29a6231d3747fb31@syzkaller.appspotmail.com
>
> ------------[ cut here ]------------
> kernel BUG at mm/rmap.c:2330!

BUG_ON(!PageLocked(page)) in hugepage_add_anon_rmap()


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