diff options
| author | Mike Galbraith <efault@gmx.de> | 2012-05-11 00:01:45 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-05-11 02:06:44 +0400 |
| commit | 5e2bf0142231194d36fdc9596b36a261ed2b9fe7 (patch) | |
| tree | e5b411ddefaa96b29a73706f7fe407f238632573 | |
| parent | 4998a6c0edce7fae9c0a5463f6ec3fa585258ee7 (diff) | |
| download | linux-5e2bf0142231194d36fdc9596b36a261ed2b9fe7.tar.xz | |
namespaces, pid_ns: fix leakage on fork() failure
Fork() failure post namespace creation for a child cloned with
CLONE_NEWPID leaks pid_namespace/mnt_cache due to proc being mounted
during creation, but not unmounted during cleanup. Call
pid_ns_release_proc() during cleanup.
Signed-off-by: Mike Galbraith <efault@gmx.de>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Reviewed-by: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Pavel Emelyanov <xemul@parallels.com>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Louis Rilling <louis.rilling@kerlabs.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | kernel/fork.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/fork.c b/kernel/fork.c index b9372a0bff18..687a15d56243 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -47,6 +47,7 @@ #include <linux/audit.h> #include <linux/memcontrol.h> #include <linux/ftrace.h> +#include <linux/proc_fs.h> #include <linux/profile.h> #include <linux/rmap.h> #include <linux/ksm.h> @@ -1464,6 +1465,8 @@ bad_fork_cleanup_io: if (p->io_context) exit_io_context(p); bad_fork_cleanup_namespaces: + if (unlikely(clone_flags & CLONE_NEWPID)) + pid_ns_release_proc(p->nsproxy->pid_ns); exit_task_namespaces(p); bad_fork_cleanup_mm: if (p->mm) |