[PATCH 0/5][RFC][v3] steps to make audit pid namespace-safe

This patchset is a revival of some of Eric Biederman's work to make audit pid-namespace-safe. In a couple of places, audit was printing PIDs in the task's pid namespace rather than relative to the audit daemon's pid namespace, which currently is init_pid_ns. It also allows processes to log audit user messages in their own pid namespaces, which was not previously permitted. Please see: https://bugzilla.redhat.com/show_bug.cgi?id=947530 https://bugs.launchpad.net/ubuntu/+source/vsftpd/+bug/1160372 https://bugzilla.novell.com/show_bug.cgi?id=786024 Part of the cleanup here involves deprecating task->pid and task->tgid, which should be accessed using their respective helper functions. See: https://lkml.org/lkml/2013/8/20/638 Richard Guy Briggs (5): pid: get pid_t ppid of task in init_pid_ns audit: convert PPIDs to the inital PID namespace. audit: store audit_pid as a struct pid pointer audit: anchor all pid references in the initial pid namespace audit: allow user processes to log from another PID namespace drivers/tty/tty_audit.c | 3 +- include/linux/sched.h | 18 ++++++++++ kernel/audit.c | 59 ++++++++++++++++++++++++---------- kernel/audit.h | 4 +- kernel/auditfilter.c | 17 +++++++++- kernel/auditsc.c | 24 +++++++------ security/integrity/integrity_audit.c | 2 +- security/lsm_audit.c | 11 ++++-- 8 files changed, 101 insertions(+), 37 deletions(-)