1 files changed, 7 insertions, 1 deletions

diff --git a/kernel/params.c b/kernel/params.c
index 1d6aca288cdc..16f269e9ddc9 100644
--- a/kernel/params.c
+++ b/kernel/params.c
@@ -592,11 +592,17 @@ static void __init param_sysfs_builtin(void)
 
         for (i=0; i < __stop___param - __start___param; i++) {
                 char *dot;
+                size_t kplen;
 
                 kp = &__start___param[i];
+                kplen = strlen(kp->name);
 
                 /* We do not handle args without periods. */
-                dot = memchr(kp->name, '.', MAX_KBUILD_MODNAME);
+                if (kplen > MAX_KBUILD_MODNAME) {
+                        DEBUGP("kernel parameter name is too long: %s\n", kp->name);
+                        continue;
+                }
+                dot = memchr(kp->name, '.', kplen);
                 if (!dot) {
                         DEBUGP("couldn't find period in %s\n", kp->name);
                         continue;