jail: Add MS_NODEV MS_NOEXEC MS_NOSUID mount options where needed

this completes fafbf7338ec8304f2a0ec0ba76048fba2c01c07e

Signed-off-by: Etienne CHAMPETIER <champetier.etienne@gmail.com>

diff --git a/jail/jail.c b/jail/jail.c
index f459a5e..56dc9ca 100644 (file)
--- a/jail/jail.c
+++ b/jail/jail.c
@@ -193,11 +193,11 @@ static int build_jail_fs()
        rmdir("/old");
        if (opts.procfs) {
                mkdir("/proc", 0755);
-               mount("proc", "/proc", "proc", MS_NOATIME, 0);
+               mount("proc", "/proc", "proc", MS_NOATIME | MS_NODEV | MS_NOEXEC | MS_NOSUID, 0);
        }
        if (opts.sysfs) {
                mkdir("/sys", 0755);
-               mount("sysfs", "/sys", "sysfs", MS_NOATIME, 0);
+               mount("sysfs", "/sys", "sysfs", MS_NOATIME | MS_NODEV | MS_NOEXEC | MS_NOSUID, 0);
        }
        if (opts.ronly)
                mount(NULL, "/", NULL, MS_RDONLY | MS_REMOUNT, 0);