On 09/01/2014 02:19 PM, Steven Stewart-Gallus wrote:
Hello,I am not confused about how I can currently use pivot_root for containers on my kernel (version 3.13). Currently a sequence like: if (-1 == syscall(__NR_pivot_root, ".", ".")) { perror("pivot_root"); return EXIT_FAILURE; } if (-1 == umount2(".", MNT_DETACH)) { perror("umount"); return EXIT_FAILURE;
Given the comment, you don't know what '.' refers to in the umount2 call above. In fact, I think you're actually detaching the wrong thing, leaving possible security issues.
See: https://github.com/sandstorm-io/sandstorm/blob/master/src/sandstorm/supervisor-main.c%2B%2B#L922 for a program that does this more carefully. --Andy -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
