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Diffstat (limited to 'drivers/connector')
-rw-r--r--drivers/connector/cn_proc.c22
1 files changed, 18 insertions, 4 deletions
diff --git a/drivers/connector/cn_proc.c b/drivers/connector/cn_proc.c
index ed5e42461094..ad48fd52cb53 100644
--- a/drivers/connector/cn_proc.c
+++ b/drivers/connector/cn_proc.c
@@ -250,6 +250,7 @@ void proc_coredump_connector(struct task_struct *task)
{
struct cn_msg *msg;
struct proc_event *ev;
+ struct task_struct *parent;
__u8 buffer[CN_PROC_MSG_SIZE] __aligned(8);
if (atomic_read(&proc_event_num_listeners) < 1)
@@ -262,8 +263,14 @@ void proc_coredump_connector(struct task_struct *task)
ev->what = PROC_EVENT_COREDUMP;
ev->event_data.coredump.process_pid = task->pid;
ev->event_data.coredump.process_tgid = task->tgid;
- ev->event_data.coredump.parent_pid = task->real_parent->pid;
- ev->event_data.coredump.parent_tgid = task->real_parent->tgid;
+
+ rcu_read_lock();
+ if (pid_alive(task)) {
+ parent = rcu_dereference(task->real_parent);
+ ev->event_data.coredump.parent_pid = parent->pid;
+ ev->event_data.coredump.parent_tgid = parent->tgid;
+ }
+ rcu_read_unlock();
memcpy(&msg->id, &cn_proc_event_id, sizeof(msg->id));
msg->ack = 0; /* not used */
@@ -276,6 +283,7 @@ void proc_exit_connector(struct task_struct *task)
{
struct cn_msg *msg;
struct proc_event *ev;
+ struct task_struct *parent;
__u8 buffer[CN_PROC_MSG_SIZE] __aligned(8);
if (atomic_read(&proc_event_num_listeners) < 1)
@@ -290,8 +298,14 @@ void proc_exit_connector(struct task_struct *task)
ev->event_data.exit.process_tgid = task->tgid;
ev->event_data.exit.exit_code = task->exit_code;
ev->event_data.exit.exit_signal = task->exit_signal;
- ev->event_data.exit.parent_pid = task->real_parent->pid;
- ev->event_data.exit.parent_tgid = task->real_parent->tgid;
+
+ rcu_read_lock();
+ if (pid_alive(task)) {
+ parent = rcu_dereference(task->real_parent);
+ ev->event_data.exit.parent_pid = parent->pid;
+ ev->event_data.exit.parent_tgid = parent->tgid;
+ }
+ rcu_read_unlock();
memcpy(&msg->id, &cn_proc_event_id, sizeof(msg->id));
msg->ack = 0; /* not used */