3 files changed, 6 insertions, 2 deletions
diff --git a/kernel/lib/buffered_write.c b/kernel/lib/buffered_write.c
index b6b78f9..8642c89 100644
--- a/kernel/lib/buffered_write.c
+++ b/kernel/lib/buffered_write.c
@@ -1,5 +1,6 @@
 #include <kmalloc.h>
 #include <lib/buffered_write.h>
+#include <string.h>
 
 int buffered_init(struct buffered *ctx, u16 size) {
   ctx->data = kmalloc(size);
diff --git a/kernel/lib/relist.c b/kernel/lib/relist.c
index a2f9ce5..01af884 100644
--- a/kernel/lib/relist.c
+++ b/kernel/lib/relist.c
@@ -2,6 +2,7 @@
 #include <kmalloc.h>
 #include <lib/relist.h>
 #include <math.h>
+#include <string.h>
 
 void relist_init(struct relist *list) {
   list->bitmap_capacity = 1;
diff --git a/kernel/lib/ringbuffer.c b/kernel/lib/ringbuffer.c
index 9caf555..643e6b9 100644
--- a/kernel/lib/ringbuffer.c
+++ b/kernel/lib/ringbuffer.c
@@ -74,9 +74,11 @@ u32 ringbuffer_read(struct ringbuffer *rb, u8 *buffer, u32 len) {
     }
     read_len = min(len, read_len);
 
-    memcpy(buffer, rb->buffer + rb->read_ptr, read_len);
+    if (buffer) {
+      memcpy(buffer, rb->buffer + rb->read_ptr, read_len);
+      buffer += read_len;
+    }
     len -= read_len;
-    buffer += read_len;
     rb->read_ptr = (rb->read_ptr + read_len) % rb->buffer_size;
   }
   return orig_len - len;