kernel/params.c: use scnprintf() instead of sprintf()
For some strings (e.g. version string), they are permitted to be larger
than PAGE_SIZE (although meaningless), so recommend to use scnprintf()
instead of sprintf().
Signed-off-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
diff --git a/kernel/params.c b/kernel/params.c
index ec4299c..e5f8f17 100644
--- a/kernel/params.c
+++ b/kernel/params.c
@@ -241,7 +241,8 @@
} \
int param_get_##name(char *buffer, const struct kernel_param *kp) \
{ \
- return sprintf(buffer, format, *((type *)kp->arg)); \
+ return scnprintf(buffer, PAGE_SIZE, format, \
+ *((type *)kp->arg)); \
} \
struct kernel_param_ops param_ops_##name = { \
.set = param_set_##name, \
@@ -285,7 +286,7 @@
int param_get_charp(char *buffer, const struct kernel_param *kp)
{
- return sprintf(buffer, "%s", *((char **)kp->arg));
+ return scnprintf(buffer, PAGE_SIZE, "%s", *((char **)kp->arg));
}
EXPORT_SYMBOL(param_get_charp);
@@ -829,7 +830,7 @@
struct module_version_attribute *vattr =
container_of(mattr, struct module_version_attribute, mattr);
- return sprintf(buf, "%s\n", vattr->version);
+ return scnprintf(buf, PAGE_SIZE, "%s\n", vattr->version);
}
extern const struct module_version_attribute *__start___modver[];