device: 0.573 graphic: 0.562 semantic: 0.485 mistranslation: 0.466 network: 0.376 virtual: 0.373 user-level: 0.299 PID: 0.256 i386: 0.217 socket: 0.215 vnc: 0.206 ppc: 0.206 x86: 0.190 hypervisor: 0.189 architecture: 0.168 performance: 0.167 arm: 0.160 permissions: 0.143 risc-v: 0.126 register: 0.119 kernel: 0.119 debug: 0.116 peripherals: 0.093 boot: 0.092 VMM: 0.092 files: 0.074 KVM: 0.068 assembly: 0.059 TCG: 0.049 qemu segfaults when security_model=none using virtio-9p-pci driver qemu version: 0.13 commit-id: 6ed912999d6ef636a5be5ccb266d7d3c0f0310b4 example invocation: $ qemu -virtfs local,path=/tmp,security_model=none,mount_tag=mmm r.img one of the following must be specified as thesecurity option: security_model=passthrough security_model=mapped Segmentation fault Patch is attached. Also attached is a patch that addes the space between 'the' and 'security' in 'thesecurity'. Does not affect trunk. Add the space in 'thesecurity'. Current QEMU 2.7 does not segfault here anymore, and the "thesecurity" problem is also not available in the sources anymore ==> I think this can be closed nowadays.