In QEMU 5.2.0, a MemoryRegionOps object may lack read/write callback methods, leading to a NULL pointer dereference.
In QEMU 5.2.0, a MemoryRegionOps object may lack read/write callback methods, leading to a NULL pointer dereference.
https://www.openwall.com/lists/oss-security/2020/07/02/1 https://lists.nongnu.org/archive/html/qemu-devel/2020-08/msg02003.html