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namespace: remount namespace root dir for SLAVE to avoid propagation of mounts from the namespace to the host

Browse source 
https://bugzilla.redhat.com/show_bug.cgi?id=752540
This commit is contained in:
Daniel Walsh 2012-01-03 21:12:10 +01:00 committed by Lennart Poettering
parent 86aa7ba4f9
commit dc4b020064
1 changed files with 6 additions and 2 deletions
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8
src/namespace.c
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@ -266,8 +266,12 @@ int setup_namespace(
goto fail;
}
/* We assume that by default mount events from us won't be
* propagated to the root namespace. */
/* Remount / as SLAVE so that nothing mounted in the namespace
shows up in the parent */
if (mount(NULL, "/", NULL, MS_SLAVE|MS_REC, NULL) < 0) {
r = -errno;
goto fail;
}
for (p = paths; p < paths + n; p++)
if ((r = apply_mount(p, root_dir, inaccessible_dir, private_dir, flags)) < 0)