sys_getppid: add missing rcu_dereference

In order to safely dereference current->real_parent inside an rcu_read_lock, we need an rcu_dereference.

Mandeep Singh Baines committed 14 years ago

Commit 031af161 parent 1cee22b1 file · +1 −1Browse files

Unified · Split

@@ -1368,7 +1368,7 @@ SYSCALL_DEFINE0(getppid) · 1367 unmodified lines
1368	int pid;	1368	int pid;
1369		1369
1370	rcu_read_lock();	1370	rcu_read_lock();
1371	pid = task_tgid_vnr(current->real_parent);	1371	pid = task_tgid_vnr(rcu_dereference(current->real_parent));
1372	rcu_read_unlock();	1372	rcu_read_unlock();
1373		1373
1374	return pid;	1374	return pid;