On 12/20/2017 09:40 PM, linzhecheng wrote:

If qemu_thread_args is freed here, start_routine(arg) will lead to use
after free because arg equals to qemu_thread_args

No, we explicitly copied qemu_thread_args->arg into a local variable prior to
freeing qemu_thread_args, so that we do not have to dereference the freed
variable.
OK, that's true.

By the way, your mailer is breaking threading; it is omitting 'In-Reply-To:' and 'References:' headers, which makes every mail from you show up as a new top-level thread, rather than properly threaded to what you are responding to.

--
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org

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