avcodec/bytestream2: don't allow using NULL pointers

jamrial · jamrial · commit 6ba0b59d8b01 · 2026-03-15T19:27:07.000-03:00
This is UB.

Signed-off-by: James Almer &lt;jamrial@gmail.com&gt;
diff --git a/libavcodec/bytestream.h b/libavcodec/bytestream.h
@@ -138,7 +138,7 @@ static av_always_inline void bytestream2_init(GetByteContext *g,
                                               const uint8_t *buf,
                                               int buf_size)
 {
-    av_assert0(buf_size >= 0);
+    av_assert0(buf && buf_size >= 0);
     g->buffer       = buf;
     g->buffer_start = buf;
     g->buffer_end   = buf + buf_size;
@@ -148,7 +148,7 @@ static av_always_inline void bytestream2_init_writer(PutByteContext *p,
                                                      uint8_t *buf,
                                                      int buf_size)
 {
-    av_assert0(buf_size >= 0);
+    av_assert0(buf && buf_size >= 0);
     p->buffer       = buf;
     p->buffer_start = buf;
     p->buffer_end   = buf + buf_size;
