tree e61aff9aa3aac609d6328861aa47f78444f125db
parent a4989aa87fda0432514692e30cffebba660ce546
author Barret Rhoden <brho@cs.berkeley.edu> 1565799893 -0400
committer Barret Rhoden <brho@cs.berkeley.edu> 1565800009 -0400

acpi: handle machines with no MCFG

Syzkaller died during early boot after ACPI init and before/during PCI.
It's likely the VM it runs in doesn't have an MCFG, and we weren't
handling that case when PCI queried a device's MMIO config space.

Reported-by: syzbot+3feb100d5398d8b5d728@syzkaller.appspotmail.com
Signed-off-by: Barret Rhoden <brho@cs.berkeley.edu>