Re: KASAN: slab-out-of-bounds Read in gfn_to_pfn

From: Sean Christopherson
Date: Fri Apr 10 2020 - 13:50:35 EST


On Fri, Apr 10, 2020 at 09:33:11AM -0700, syzbot wrote:
> Hello,
>
> syzbot found the following crash on:
>
> HEAD commit: f5e94d10 Merge tag 'drm-next-2020-04-08' of git://anongit...
> git tree: upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=1450c657e00000
> kernel config: https://syzkaller.appspot.com/x/.config?x=ca75979eeebf06c2
> dashboard link: https://syzkaller.appspot.com/bug?extid=25a50e1a4e196faed650
> compiler: gcc (GCC) 9.0.0 20181231 (experimental)
>
> Unfortunately, I don't have any reproducer for this crash yet.
>
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+25a50e1a4e196faed650@xxxxxxxxxxxxxxxxxxxxxxxxx

#syz dup: KASAN: slab-out-of-bounds Read in __kvm_gfn_to_hva_cache_init