ftrace: Unlock hash mutex on failed allocation in process_mod_list()

If the new_hash fails to allocate, then unlock the hash mutex on error.

Reported-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 7509ef9..2c79630 100644 (file)
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -3997,7 +3997,7 @@ static void process_mod_list(struct list_head *head, struct ftrace_ops *ops,
        new_hash = alloc_and_copy_ftrace_hash(FTRACE_HASH_DEFAULT_BITS,
                                              *orig_hash);
        if (!new_hash)
-               return; /* Warn? */
+               goto out; /* warn? */
 
        mutex_lock(&ftrace_lock);
 
@@ -4042,6 +4042,7 @@ static void process_mod_list(struct list_head *head, struct ftrace_ops *ops,
                                              new_hash, enable);
        mutex_unlock(&ftrace_lock);
 
+ out:
        mutex_unlock(&ops->func_hash->regex_lock);
 
        free_ftrace_hash(new_hash);