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authorEric W. Biederman <ebiederm@xmission.com>2014-02-28 10:49:05 -0800
committerEric Paris <eparis@redhat.com>2014-03-20 10:10:53 -0400
commit638a0fd2a062568c568661be0a780be8e8836d03 (patch)
treee250ef6ef5ddf0ff6c189362b5e125c3a7bc402e /kernel/auditfilter.c
parent3f1c82502c299da08b7b7f08b435212e51166ed9 (diff)
audit: Use struct net not pid_t to remember the network namespce to reply in
While reading through 3.14-rc1 I found a pretty siginficant mishandling of network namespaces in the recent audit changes. In struct audit_netlink_list and audit_reply add a reference to the network namespace of the caller and remove the userspace pid of the caller. This cleanly remembers the callers network namespace, and removes a huge class of races and nasty failure modes that can occur when attempting to relook up the callers network namespace from a pid_t (including the caller's network namespace changing, pid wraparound, and the pid simply not being present). Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Acked-by: Richard Guy Briggs <rgb@redhat.com> Signed-off-by: Eric Paris <eparis@redhat.com>
Diffstat (limited to 'kernel/auditfilter.c')
-rw-r--r--kernel/auditfilter.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c
index 3152d1aea164..a0d470131fd0 100644
--- a/kernel/auditfilter.c
+++ b/kernel/auditfilter.c
@@ -31,6 +31,7 @@
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/security.h>
+#include <net/net_namespace.h>
#include "audit.h"
/*
@@ -1085,8 +1086,8 @@ int audit_list_rules_send(__u32 portid, int seq)
dest = kmalloc(sizeof(struct audit_netlink_list), GFP_KERNEL);
if (!dest)
return -ENOMEM;
+ dest->net = get_net(current->nsproxy->net_ns);
dest->portid = portid;
- dest->pid = task_pid_vnr(current);
skb_queue_head_init(&dest->q);
mutex_lock(&audit_filter_mutex);