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diff --git a/builtins/pushd.def b/builtins/pushd.def
index 05b7529..4eb0132 100644
--- a/builtins/pushd.def
+++ b/builtins/pushd.def
@@ -353,7 +353,7 @@ popd_builtin (list)
break;
}
- if (which > directory_list_offset || (directory_list_offset == 0 && which == 0))
+ if (which > directory_list_offset || (which < -directory_list_offset) || (directory_list_offset == 0 && which == 0))
{
pushd_error (directory_list_offset, which_word ? which_word : "");
return (EXECUTION_FAILURE);
@@ -375,6 +375,11 @@ popd_builtin (list)
remove that directory from the list and shift the remainder
of the list into place. */
i = (direction == '+') ? directory_list_offset - which : which;
+ if (i < 0 || i > directory_list_offset)
+ {
+ pushd_error (directory_list_offset, which_word ? which_word : "");
+ return (EXECUTION_FAILURE);
+ }
free (pushd_directory_list[i]);
directory_list_offset--;
--
2.9.3