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Diffstat (limited to 'kernel/signal.c')
-rw-r--r--kernel/signal.c52
1 files changed, 39 insertions, 13 deletions
diff --git a/kernel/signal.c b/kernel/signal.c
index 98923882ba57..d809cdd6c0f1 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -694,7 +694,7 @@ static int send_signal(int sig, struct siginfo *info, struct task_struct *t,
q->info.si_signo = sig;
q->info.si_errno = 0;
q->info.si_code = SI_USER;
- q->info.si_pid = current->pid;
+ q->info.si_pid = task_pid_vnr(current);
q->info.si_uid = current->uid;
break;
case (unsigned long) SEND_SIG_PRIV:
@@ -1089,7 +1089,7 @@ kill_proc_info(int sig, struct siginfo *info, pid_t pid)
{
int error;
rcu_read_lock();
- error = kill_pid_info(sig, info, find_pid(pid));
+ error = kill_pid_info(sig, info, find_vpid(pid));
rcu_read_unlock();
return error;
}
@@ -1160,9 +1160,9 @@ static int kill_something_info(int sig, struct siginfo *info, int pid)
read_unlock(&tasklist_lock);
ret = count ? retval : -ESRCH;
} else if (pid < 0) {
- ret = kill_pgrp_info(sig, info, find_pid(-pid));
+ ret = kill_pgrp_info(sig, info, find_vpid(-pid));
} else {
- ret = kill_pid_info(sig, info, find_pid(pid));
+ ret = kill_pid_info(sig, info, find_vpid(pid));
}
rcu_read_unlock();
return ret;
@@ -1266,7 +1266,12 @@ EXPORT_SYMBOL(kill_pid);
int
kill_proc(pid_t pid, int sig, int priv)
{
- return kill_proc_info(sig, __si_special(priv), pid);
+ int ret;
+
+ rcu_read_lock();
+ ret = kill_pid_info(sig, __si_special(priv), find_pid(pid));
+ rcu_read_unlock();
+ return ret;
}
/*
@@ -1443,7 +1448,22 @@ void do_notify_parent(struct task_struct *tsk, int sig)
info.si_signo = sig;
info.si_errno = 0;
- info.si_pid = tsk->pid;
+ /*
+ * we are under tasklist_lock here so our parent is tied to
+ * us and cannot exit and release its namespace.
+ *
+ * the only it can is to switch its nsproxy with sys_unshare,
+ * bu uncharing pid namespaces is not allowed, so we'll always
+ * see relevant namespace
+ *
+ * write_lock() currently calls preempt_disable() which is the
+ * same as rcu_read_lock(), but according to Oleg, this is not
+ * correct to rely on this
+ */
+ rcu_read_lock();
+ info.si_pid = task_pid_nr_ns(tsk, tsk->parent->nsproxy->pid_ns);
+ rcu_read_unlock();
+
info.si_uid = tsk->uid;
/* FIXME: find out whether or not this is supposed to be c*time. */
@@ -1508,7 +1528,13 @@ static void do_notify_parent_cldstop(struct task_struct *tsk, int why)
info.si_signo = SIGCHLD;
info.si_errno = 0;
- info.si_pid = tsk->pid;
+ /*
+ * see comment in do_notify_parent() abot the following 3 lines
+ */
+ rcu_read_lock();
+ info.si_pid = task_pid_nr_ns(tsk, tsk->parent->nsproxy->pid_ns);
+ rcu_read_unlock();
+
info.si_uid = tsk->uid;
/* FIXME: find out whether or not this is supposed to be c*time. */
@@ -1634,7 +1660,7 @@ void ptrace_notify(int exit_code)
memset(&info, 0, sizeof info);
info.si_signo = SIGTRAP;
info.si_code = exit_code;
- info.si_pid = current->pid;
+ info.si_pid = task_pid_vnr(current);
info.si_uid = current->uid;
/* Let the debugger run. */
@@ -1804,7 +1830,7 @@ relock:
info->si_signo = signr;
info->si_errno = 0;
info->si_code = SI_USER;
- info->si_pid = current->parent->pid;
+ info->si_pid = task_pid_vnr(current->parent);
info->si_uid = current->parent->uid;
}
@@ -2191,7 +2217,7 @@ sys_kill(int pid, int sig)
info.si_signo = sig;
info.si_errno = 0;
info.si_code = SI_USER;
- info.si_pid = current->tgid;
+ info.si_pid = task_tgid_vnr(current);
info.si_uid = current->uid;
return kill_something_info(sig, &info, pid);
@@ -2207,12 +2233,12 @@ static int do_tkill(int tgid, int pid, int sig)
info.si_signo = sig;
info.si_errno = 0;
info.si_code = SI_TKILL;
- info.si_pid = current->tgid;
+ info.si_pid = task_tgid_vnr(current);
info.si_uid = current->uid;
read_lock(&tasklist_lock);
- p = find_task_by_pid(pid);
- if (p && (tgid <= 0 || p->tgid == tgid)) {
+ p = find_task_by_pid_ns(pid, current->nsproxy->pid_ns);
+ if (p && (tgid <= 0 || task_tgid_vnr(p) == tgid)) {
error = check_kill_permission(sig, &info, p);
/*
* The null signal is a permissions and process existence