1 files changed, 15 insertions, 0 deletions
diff --git a/libarchive/archive_read_support_format_rar.c b/libarchive/archive_read_support_format_rar.c
index 79669a8f40f9..4fc6626cacfd 100644
--- a/libarchive/archive_read_support_format_rar.c
+++ b/libarchive/archive_read_support_format_rar.c
@@ -3612,7 +3612,15 @@ execute_filter_delta(struct rar_filter *filter, struct rar_virtual_machine *vm)
   {
     uint8_t lastbyte = 0;
     for (idx = i; idx < length; idx += numchannels)
+    {
+      /*
+       * The src block should not overlap with the dst block.
+       * If so it would be better to consider this archive is broken.
+       */
+      if (src >= dst)
+        return 0;
       lastbyte = dst[idx] = lastbyte - *src++;
+    }
   }
 
   filter->filteredblockaddress = length;
@@ -3714,6 +3722,13 @@ execute_filter_audio(struct rar_filter *filter, struct rar_virtual_machine *vm)
     memset(&state, 0, sizeof(state));
     for (j = i; j < length; j += numchannels)
     {
+      /*
+       * The src block should not overlap with the dst block.
+       * If so it would be better to consider this archive is broken.
+       */
+      if (src >= dst)
+        return 0;
+
       int8_t delta = (int8_t)*src++;
       uint8_t predbyte, byte;
       int prederror;