diff options
| author | Chen Gang <gang.chen@asianux.com> | 2013-08-20 15:35:04 +0930 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2013-08-20 15:37:46 +0930 |
| commit | f4940ab7c5992d3fabcda039744fb7657749798e (patch) | |
| tree | ea8a5bb3f5c93a0cef4c0e91ad87017f299bfdec | |
| parent | cc56ded3fdd365e07e03315379ee6612a68fd817 (diff) | |
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>
| -rw-r--r-- | kernel/params.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/kernel/params.c b/kernel/params.c index ec4299cfade8..e5f8f17e57cf 100644 --- a/kernel/params.c +++ b/kernel/params.c @@ -241,7 +241,8 @@ int parse_args(const char *doing, } \ 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 @@ EXPORT_SYMBOL(param_set_charp); 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 @@ ssize_t __modver_version_show(struct module_attribute *mattr, 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[]; |