1 files changed, 6 insertions, 0 deletions
diff --git a/src/input/input_pvr.c b/src/input/input_pvr.c
index 009c76939..18d29f6be 100644
--- a/src/input/input_pvr.c
+++ b/src/input/input_pvr.c
@@ -424,6 +424,9 @@ static uint32_t pvr_plugin_get_capabilities (input_plugin_t *this_gen) {
 static off_t pvr_plugin_read (input_plugin_t *this_gen, char *buf, off_t len) {
   /*pvr_input_plugin_t *this = (pvr_input_plugin_t *) this_gen;*/
 
+  if (len < 4)
+    return -1;
+
   /* FIXME: Tricking the demux_mpeg_block plugin */
   buf[0] = 0;
   buf[1] = 0;
@@ -1199,6 +1202,9 @@ static buf_element_t *pvr_plugin_read_block (input_plugin_t *this_gen, fifo_buff
   buf_element_t        *buf;
   int                   speed = _x_get_speed(this->stream);
 
+  if (todo < 0 || todo > buf->size)
+    return NULL;
+
   if( !this->pvr_running ) {
     xprintf(this->stream->xine, XINE_VERBOSITY_DEBUG, "input_pvr: thread died, aborting\n");
     return NULL;