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Subject[PATCH] ftrace: use strscpy to replace strlcpy

The strlcpy should not be used because it doesn't limit the source
length. Preferred is strscpy.

Signed-off-by: XueBing Chen <chenxuebing@jari.cn>
---
kernel/trace/ftrace.c | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 601ccf1b2f09..8d2ad1472fcb 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -5902,7 +5902,7 @@ bool ftrace_filter_param __initdata;
static int __init set_ftrace_notrace(char *str)
{
ftrace_filter_param = true;
- strlcpy(ftrace_notrace_buf, str, FTRACE_FILTER_SIZE);
+ strscpy(ftrace_notrace_buf, str, FTRACE_FILTER_SIZE);
return 1;
}
__setup("ftrace_notrace=", set_ftrace_notrace);
@@ -5910,7 +5910,7 @@ __setup("ftrace_notrace=", set_ftrace_notrace);
static int __init set_ftrace_filter(char *str)
{
ftrace_filter_param = true;
- strlcpy(ftrace_filter_buf, str, FTRACE_FILTER_SIZE);
+ strscpy(ftrace_filter_buf, str, FTRACE_FILTER_SIZE);
return 1;
}
__setup("ftrace_filter=", set_ftrace_filter);
@@ -5922,14 +5922,14 @@ static int ftrace_graph_set_hash(struct ftrace_hash *hash, char *buffer);

static int __init set_graph_function(char *str)
{
- strlcpy(ftrace_graph_buf, str, FTRACE_FILTER_SIZE);
+ strscpy(ftrace_graph_buf, str, FTRACE_FILTER_SIZE);
return 1;
}
__setup("ftrace_graph_filter=", set_graph_function);

static int __init set_graph_notrace_function(char *str)
{
- strlcpy(ftrace_graph_notrace_buf, str, FTRACE_FILTER_SIZE);
+ strscpy(ftrace_graph_notrace_buf, str, FTRACE_FILTER_SIZE);
return 1;
}
__setup("ftrace_graph_notrace=", set_graph_notrace_function);
@@ -6714,8 +6714,8 @@ static int ftrace_get_trampoline_kallsym(unsigned int symnum,
continue;
*value = op->trampoline;
*type = 't';
- strlcpy(name, FTRACE_TRAMPOLINE_SYM, KSYM_NAME_LEN);
- strlcpy(module_name, FTRACE_TRAMPOLINE_MOD, MODULE_NAME_LEN);
+ strscpy(name, FTRACE_TRAMPOLINE_SYM, KSYM_NAME_LEN);
+ strscpy(module_name, FTRACE_TRAMPOLINE_MOD, MODULE_NAME_LEN);
*exported = 0;
return 0;
}
@@ -7046,7 +7046,7 @@ ftrace_func_address_lookup(struct ftrace_mod_map *mod_map,
if (off)
*off = addr - found_func->ip;
if (sym)
- strlcpy(sym, found_func->name, KSYM_NAME_LEN);
+ strscpy(sym, found_func->name, KSYM_NAME_LEN);

return found_func->name;
}
@@ -7100,8 +7100,8 @@ int ftrace_mod_get_kallsym(unsigned int symnum, unsigned long *value,

*value = mod_func->ip;
*type = 'T';
- strlcpy(name, mod_func->name, KSYM_NAME_LEN);
- strlcpy(module_name, mod_map->mod->name, MODULE_NAME_LEN);
+ strscpy(name, mod_func->name, KSYM_NAME_LEN);
+ strscpy(module_name, mod_map->mod->name, MODULE_NAME_LEN);
*exported = 1;
preempt_enable();
return 0;
--
2.25.1

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