1 files changed, 6 insertions, 2 deletions

diff --git a/lib/seq_buf.c b/lib/seq_buf.c
index 11f2ae0f9099..bd807f545a9d 100644
--- a/lib/seq_buf.c
+++ b/lib/seq_buf.c
@@ -140,13 +140,17 @@ int seq_buf_bprintf(struct seq_buf *s, const char *fmt, const u32 *binary)
  */
 int seq_buf_puts(struct seq_buf *s, const char *str)
 {
-        unsigned int len = strlen(str);
+        size_t len = strlen(str);
 
         WARN_ON(s->size == 0);
 
+        /* Add 1 to len for the trailing null byte which must be there */
+        len += 1;
+
         if (seq_buf_can_fit(s, len)) {
                 memcpy(s->buffer + s->len, str, len);
-                s->len += len;
+                /* Don't count the trailing null byte against the capacity */
+                s->len += len - 1;
                 return 0;
         }
         seq_buf_set_overflow(s);