1 files changed, 4 insertions, 1 deletions

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index d5f7c4d84bcd..063a92bad578 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -843,9 +843,12 @@ int trace_get_user(struct trace_parser *parser, const char __user *ubuf,
         if (isspace(ch)) {
                 parser->buffer[parser->idx] = 0;
                 parser->cont = false;
-        } else {
+        } else if (parser->idx < parser->size - 1) {
                 parser->cont = true;
                 parser->buffer[parser->idx++] = ch;
+        } else {
+                ret = -EINVAL;
+                goto out;
         }
 
         *ppos += read;