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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>
This commit is contained in:
Steven Rostedt (VMware) 2017-06-28 09:09:38 -04:00
parent 441dae8f2f
commit 3b58a3c72f
1 changed files with 2 additions and 1 deletions
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3
kernel/trace/ftrace.c
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@ -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);