diff options
Diffstat (limited to 'kernel/taskstats.c')
| -rw-r--r-- | kernel/taskstats.c | 39 |
1 files changed, 25 insertions, 14 deletions
diff --git a/kernel/taskstats.c b/kernel/taskstats.c index d0a32796550f..145bb4d3bd4d 100644 --- a/kernel/taskstats.c +++ b/kernel/taskstats.c @@ -27,6 +27,7 @@ #include <linux/cgroup.h> #include <linux/fs.h> #include <linux/file.h> +#include <linux/pid_namespace.h> #include <net/genetlink.h> #include <linux/atomic.h> @@ -174,7 +175,9 @@ static void send_cpu_listeners(struct sk_buff *skb, up_write(&listeners->sem); } -static void fill_stats(struct task_struct *tsk, struct taskstats *stats) +static void fill_stats(struct user_namespace *user_ns, + struct pid_namespace *pid_ns, + struct task_struct *tsk, struct taskstats *stats) { memset(stats, 0, sizeof(*stats)); /* @@ -190,7 +193,7 @@ static void fill_stats(struct task_struct *tsk, struct taskstats *stats) stats->version = TASKSTATS_VERSION; stats->nvcsw = tsk->nvcsw; stats->nivcsw = tsk->nivcsw; - bacct_add_tsk(stats, tsk); + bacct_add_tsk(user_ns, pid_ns, stats, tsk); /* fill in extended acct fields */ xacct_add_tsk(stats, tsk); @@ -207,7 +210,7 @@ static int fill_stats_for_pid(pid_t pid, struct taskstats *stats) rcu_read_unlock(); if (!tsk) return -ESRCH; - fill_stats(tsk, stats); + fill_stats(current_user_ns(), task_active_pid_ns(current), tsk, stats); put_task_struct(tsk); return 0; } @@ -291,6 +294,12 @@ static int add_del_listener(pid_t pid, const struct cpumask *mask, int isadd) if (!cpumask_subset(mask, cpu_possible_mask)) return -EINVAL; + if (current_user_ns() != &init_user_ns) + return -EINVAL; + + if (task_active_pid_ns(current) != &init_pid_ns) + return -EINVAL; + if (isadd == REGISTER) { for_each_cpu(cpu, mask) { s = kmalloc_node(sizeof(struct listener), @@ -415,16 +424,15 @@ static int cgroupstats_user_cmd(struct sk_buff *skb, struct genl_info *info) struct nlattr *na; size_t size; u32 fd; - struct file *file; - int fput_needed; + struct fd f; na = info->attrs[CGROUPSTATS_CMD_ATTR_FD]; if (!na) return -EINVAL; fd = nla_get_u32(info->attrs[CGROUPSTATS_CMD_ATTR_FD]); - file = fget_light(fd, &fput_needed); - if (!file) + f = fdget(fd); + if (!f.file) return 0; size = nla_total_size(sizeof(struct cgroupstats)); @@ -437,6 +445,7 @@ static int cgroupstats_user_cmd(struct sk_buff *skb, struct genl_info *info) na = nla_reserve(rep_skb, CGROUPSTATS_TYPE_CGROUP_STATS, sizeof(struct cgroupstats)); if (na == NULL) { + nlmsg_free(rep_skb); rc = -EMSGSIZE; goto err; } @@ -444,7 +453,7 @@ static int cgroupstats_user_cmd(struct sk_buff *skb, struct genl_info *info) stats = nla_data(na); memset(stats, 0, sizeof(*stats)); - rc = cgroupstats_build(stats, file->f_dentry); + rc = cgroupstats_build(stats, f.file->f_dentry); if (rc < 0) { nlmsg_free(rep_skb); goto err; @@ -453,7 +462,7 @@ static int cgroupstats_user_cmd(struct sk_buff *skb, struct genl_info *info) rc = send_reply(rep_skb, info); err: - fput_light(file, fput_needed); + fdput(f); return rc; } @@ -467,7 +476,7 @@ static int cmd_attr_register_cpumask(struct genl_info *info) rc = parse(info->attrs[TASKSTATS_CMD_ATTR_REGISTER_CPUMASK], mask); if (rc < 0) goto out; - rc = add_del_listener(info->snd_pid, mask, REGISTER); + rc = add_del_listener(info->snd_portid, mask, REGISTER); out: free_cpumask_var(mask); return rc; @@ -483,7 +492,7 @@ static int cmd_attr_deregister_cpumask(struct genl_info *info) rc = parse(info->attrs[TASKSTATS_CMD_ATTR_DEREGISTER_CPUMASK], mask); if (rc < 0) goto out; - rc = add_del_listener(info->snd_pid, mask, DEREGISTER); + rc = add_del_listener(info->snd_portid, mask, DEREGISTER); out: free_cpumask_var(mask); return rc; @@ -631,11 +640,12 @@ void taskstats_exit(struct task_struct *tsk, int group_dead) if (rc < 0) return; - stats = mk_reply(rep_skb, TASKSTATS_TYPE_PID, tsk->pid); + stats = mk_reply(rep_skb, TASKSTATS_TYPE_PID, + task_pid_nr_ns(tsk, &init_pid_ns)); if (!stats) goto err; - fill_stats(tsk, stats); + fill_stats(&init_user_ns, &init_pid_ns, tsk, stats); /* * Doesn't matter if tsk is the leader or the last group member leaving @@ -643,7 +653,8 @@ void taskstats_exit(struct task_struct *tsk, int group_dead) if (!is_thread_group || !group_dead) goto send; - stats = mk_reply(rep_skb, TASKSTATS_TYPE_TGID, tsk->tgid); + stats = mk_reply(rep_skb, TASKSTATS_TYPE_TGID, + task_tgid_nr_ns(tsk, &init_pid_ns)); if (!stats) goto err; |