wget: fix fname_out usage wrt redirects

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 8 insertions, 2 deletions

diff --git a/networking/wget.c b/networking/wget.c
index 9d50437d8..bc922836a 100644
--- a/networking/wget.c
+++ b/networking/wget.c
@@ -604,8 +604,14 @@ static void download_one_url(const char *url)
                 if (G.fname_out[0] == '/' || !G.fname_out[0])
                         G.fname_out = (char*)"index.html";
                 /* -P DIR is considered only if there was no -O FILE */
-                if (G.dir_prefix)
-                        G.fname_out = fname_out_alloc = concat_path_file(G.dir_prefix, G.fname_out);
+                else {
+                        if (G.dir_prefix)
+                                G.fname_out = fname_out_alloc = concat_path_file(G.dir_prefix, G.fname_out);
+                        else {
+                                /* redirects may free target.path later, need to make a copy */
+                                G.fname_out = fname_out_alloc = xstrdup(G.fname_out);
+                        }
+                }
         }
 #if ENABLE_FEATURE_WGET_STATUSBAR
         G.curfile = bb_get_last_path_component_nostrip(G.fname_out);