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ftrace: Copy ftrace_graph_filter boot param using strlcpy

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We are using strncpy in the wrong way to copy the ftrace_graph_filter
boot param because we pass the buffer size instead of the max string
size it can contain (buffer size - 1). The end result might not be
NULL terminated as we are abusing the max string size.

Lets use strlcpy() instead.

Reported-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Frederic Weisbecker 2009-10-14 20:43:39 +02:00
parent 459c6d15a0
commit 06f43d66ec
1 changed files with 1 additions and 1 deletions
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kernel/trace/ftrace.c
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@ -2293,7 +2293,7 @@ __setup("ftrace_filter=", set_ftrace_filter);
#ifdef CONFIG_FUNCTION_GRAPH_TRACER #ifdef CONFIG_FUNCTION_GRAPH_TRACER
static int __init set_graph_function(char *str) static int __init set_graph_function(char *str)
{ {
strncpy(ftrace_graph_buf, str, FTRACE_FILTER_SIZE); strlcpy(ftrace_graph_buf, str, FTRACE_FILTER_SIZE);
return 1; return 1;
} }
__setup("ftrace_graph_filter=", set_graph_function); __setup("ftrace_graph_filter=", set_graph_function);