ash: fix segfault in ash.

patch by walter harms <wharms@bfs.de>

diff --git a/shell/ash.c b/shell/ash.c
index 1260d5e9a0900d986c725cd9bf27f6e270c9509c..a34c871f140b4ff0ead597693a705061a41fbcd6 100644 (file)
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -3042,6 +3042,7 @@ expredir(union node *n)
 
        for (redir = n ; redir ; redir = redir->nfile.next) {
                struct arglist fn;
+               memset(&fn, 0, sizeof(struct arglist));
                fn.lastp = &fn.list;
                switch (redir->type) {
                case NFROMTO:
@@ -3056,7 +3057,10 @@ expredir(union node *n)
                case NTOFD:
                        if (redir->ndup.vname) {
                                expandarg(redir->ndup.vname, &fn, EXP_FULL | EXP_TILDE);
-                               fixredir(redir, fn.list->text, 1);
+                               if (fn.list != NULL)
+                                       fixredir(redir, fn.list->text, 1);
+                               else
+                                       sh_error("redir error");
                        }
                        break;
                }