Konnichiwa minna-sama
On a system with TOMOYO enabled, trying to run execveat(not AT_FDCWD) in
a chroot without /proc fails with ENOENT. A similar openat() succeeds.
This happens even if TOMOYO isn't configured, for example in a fresh
Debian install. Is TOMOYO supposed to do anything if not configured?
Test program:
#define _GNU_SOURCE
#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
int main(int argc, char** argv)
{
chdir("/lib/");
if (chroot("/lib/") != 0) perror("chroot (needs root)");
int fd1 = open("x86_64-linux-gnu/", O_RDONLY);
if (fd1 < 0) perror("open");
int fd2 = openat(fd1, "ld-linux-x86-64.so.2", O_RDONLY);
if (fd2 < 0) perror("openat");
execveat(fd1, "ld-linux-x86-64.so.2", NULL, NULL, 0);
perror("execveat");
}
Originally reported as a Debian bug, but I was redirected here.
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1082001
-- Alfred Agrell
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