31.05.2014 12:22, Stefan Weil wrote: > Am 31.05.2014 09:57, schrieb Paolo Bonzini: >> Il 31/05/2014 09:50, Adam Baxter ha scritto: >>> Sorry. FASM 1.66 (included as a FreeDOS package) crashes as described, >>> but FASM 1.71.21 works as expected. >> >> Yeah, I was about to reply that if a userspace program crashes both TCG >> and KVM, it's more likely to be a bug in that program (or at worst >> SeaBIOS, but in your case the output pointed at the program). > > A userspace program should never crash QEMU system emulation, should it? > Overwise this would allow Denial-of-service by any user in the virtual > machine.
If the guest kernel is correct. In this case this is FreeDOS, which allows any instructions to be run by "userspace" programs. And when such a bad/invalid instruction is run, real hw will either reboot or lock up, -- this is much more severe DoS condition :) Thanks, /mjt
