1 files changed, 17 insertions, 1 deletions
diff --git a/archivers/libarchive/files/libarchive/archive_read_support_format_rar.c b/archivers/libarchive/files/libarchive/archive_read_support_format_rar.c
index 234522229e4..49360876c2a 100644
--- a/archivers/libarchive/files/libarchive/archive_read_support_format_rar.c
+++ b/archivers/libarchive/files/libarchive/archive_read_support_format_rar.c
@@ -258,6 +258,7 @@ struct rar
   struct data_block_offsets *dbo;
   unsigned int cursor;
   unsigned int nodes;
+  char filename_must_match;
 
   /* LZSS members */
   struct huffman_code maincode;
@@ -1023,8 +1024,10 @@ archive_read_format_rar_read_data(struct archive_read *a, const void **buff,
   case COMPRESS_METHOD_GOOD:
   case COMPRESS_METHOD_BEST:
     ret = read_data_compressed(a, buff, size, offset);
-    if (ret != ARCHIVE_OK && ret != ARCHIVE_WARN)
+    if (ret != ARCHIVE_OK && ret != ARCHIVE_WARN) {
       __archive_ppmd7_functions.Ppmd7_Free(&rar->ppmd7_context);
+      rar->start_new_table = 1;
+    }
     break;
 
   default:
@@ -1560,6 +1563,12 @@ read_header(struct archive_read *a, struct archive_entry *entry,
     }
     return ret;
   }
+  else if (rar->filename_must_match)
+  {
+    archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
+      "Mismatch of file parts split across multi-volume archive");
+    return (ARCHIVE_FATAL);
+  }
 
   rar->filename_save = (char*)realloc(rar->filename_save,
                                       filename_size + 1);
@@ -2300,6 +2309,11 @@ parse_codes(struct archive_read *a)
       new_size = DICTIONARY_MAX_SIZE;
     else
       new_size = rar_fls((unsigned int)rar->unp_size) << 1;
+    if (new_size == 0) {
+      archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
+                        "Zero window size is invalid.");
+      return (ARCHIVE_FATAL);
+    }
     new_window = realloc(rar->lzss.window, new_size);
     if (new_window == NULL) {
       archive_set_error(&a->archive, ENOMEM,
@@ -2928,12 +2942,14 @@ rar_read_ahead(struct archive_read *a, size_t min, ssize_t *avail)
     else if (*avail == 0 && rar->main_flags & MHD_VOLUME &&
       rar->file_flags & FHD_SPLIT_AFTER)
     {
+      rar->filename_must_match = 1;
       ret = archive_read_format_rar_read_header(a, a->entry);
       if (ret == (ARCHIVE_EOF))
       {
         rar->has_endarc_header = 1;
         ret = archive_read_format_rar_read_header(a, a->entry);
       }
+      rar->filename_must_match = 0;
       if (ret != (ARCHIVE_OK))
         return NULL;
       return rar_read_ahead(a, min, avail);