Commit 3b58a3c7 authored by Steven Rostedt (VMware)'s avatar Steven Rostedt (VMware)
Browse files

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: default avatarJulia Lawall <julia.lawall@lip6.fr>
Signed-off-by: default avatarSteven Rostedt (VMware) <rostedt@goodmis.org>
parent 441dae8f

kernel/trace/ftrace.c

+2 −1
Original line number Diff line number Diff line
@@ -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);