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Commit 87827111 authored by Li Zefan's avatar Li Zefan Committed by Steven Rostedt
Browse files

function-graph: Fix seqfile memory leak 



Every time we cat set_graph_function, we leak memory allocated
by seq_open().

Signed-off-by: default avatarLi Zefan <lizf@cn.fujitsu.com>
LKML-Reference: <4A67D907.2010500@cn.fujitsu.com>
Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
parent d8cc1ab7

kernel/trace/ftrace.c

+12 −3
Original line number Original line Diff line number Diff line
@@ -2595,6 +2595,14 @@ ftrace_graph_open(struct inode *inode, struct file *file) 
	return ret;

	return ret;

}

}





static int

ftrace_graph_release(struct inode *inode, struct file *file)

{

	if (file->f_mode & FMODE_READ)

		seq_release(inode, file);

	return 0;

}



static int

static int

ftrace_set_func(unsigned long *array, int *idx, char *buffer)

ftrace_set_func(unsigned long *array, int *idx, char *buffer)

{

{
@@ -2727,6 +2735,7 @@ static const struct file_operations ftrace_graph_fops = { 
	.open		= ftrace_graph_open,

	.open		= ftrace_graph_open,

	.read		= seq_read,

	.read		= seq_read,

	.write		= ftrace_graph_write,

	.write		= ftrace_graph_write,

	.release	= ftrace_graph_release,

};

};

#endif /* CONFIG_FUNCTION_GRAPH_TRACER */

#endif /* CONFIG_FUNCTION_GRAPH_TRACER */