Re: [PATCH 3/5] exec: Remove recursion from search_binary_handler

[Kees Cook]

On Tue, May 12, 2020 at 04:47:14PM -0700, Kees Cook wrote:
> And now I wonder if qemu actually uses the resulting AT_EXECFD ...

It does, though I'm not sure if this is to support crossing mount points,
dropping privileges, or something else, since it does fall back to just
trying to open the file.

    execfd = qemu_getauxval(AT_EXECFD);
    if (execfd == 0) {
        execfd = open(filename, O_RDONLY);
        if (execfd < 0) {
            printf("Error while loading %s: %s\n", filename, strerror(errno));
            _exit(EXIT_FAILURE);
        }
    }


-- 
Kees Cook