kernel BUG at drivers/dma-buf/dma-buf.c:LINE!

[syzbot]

syzbot suspects this issue was fixed by commit:

commit e722a295cf493388dae474745d30e91e1a2ec549
Author: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
Date:   Thu Aug 27 12:36:27 2020 +0000

    staging: ion: remove from the tree

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=17d4f137500000
start commit:   abb3438d Merge tag 'm68knommu-for-v5.9-rc3' of git://git.k..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=978db74cb30aa994
dashboard link: https://syzkaller.appspot.com/bug?extid=d6734079f30f7fc39021
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=17428596900000

If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: staging: ion: remove from the tree

For information about bisection process see: https://goo.gl/tpsmEJ#bisection