Fix out of bounds read in Windows symlink support

diff --git a/libarchive/archive_write_disk_windows.c b/libarchive/archive_write_disk_windows.c
index c949bf9c3757f7227dfda9a27859b8f461054ecc..5474de16b32a3f3d01f4701a1081bd6284b33a56 100644 (file)
--- a/libarchive/archive_write_disk_windows.c
+++ b/libarchive/archive_write_disk_windows.c
@@ -2155,6 +2155,8 @@ check_symlinks(struct archive_write_disk *a)
                                return (ARCHIVE_FAILED);
                        }
                }
+               if (!c)
+                       break;
                pn[0] = c;
                pn++;
        }