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-rw-r--r--kernel/params.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/params.c b/kernel/params.c
index e265b13..1fc4ac7 100644
--- a/kernel/params.c
+++ b/kernel/params.c
@@ -356,6 +356,10 @@ int param_set_copystring(const char *val, struct kernel_param *kp)
{
struct kparam_string *kps = kp->arg;
+ if (!val) {
+ printk(KERN_ERR "%s: missing param set value\n", kp->name);
+ return -EINVAL;
+ }
if (strlen(val)+1 > kps->maxlen) {
printk(KERN_ERR "%s: string doesn't fit in %u chars.\n",
kp->name, kps->maxlen-1);
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