examples/passthrough_ll.c: Fix segfault when showing help or version.

root lo_inode's next and prev were not set early enough, which led to
accessing addr 0x8 (or 0x4, depending on ptr size) when setting prev
variable in lo_free(lo.root.next), because lo.root.next was NULL.

diff --git a/example/passthrough_ll.c b/example/passthrough_ll.c
index 995026ea2b4d2bde3c037ac7efdbe2f63fe8bb95..9c6144a88c1165c492fa9a91dc165919d0402968 100644 (file)
--- a/example/passthrough_ll.c
+++ b/example/passthrough_ll.c
@@ -463,6 +463,8 @@ int main(int argc, char *argv[])
        struct lo_data lo = { .debug = 0 };
        int ret = -1;
 
+       lo.root.next = lo.root.prev = &lo.root;
+
        if (fuse_parse_cmdline(&args, &opts) != 0)
                return 1;
        if (opts.show_help) {
@@ -479,7 +481,6 @@ int main(int argc, char *argv[])
        }
 
        lo.debug = opts.debug;
-       lo.root.next = lo.root.prev = &lo.root;
        lo.root.fd = open("/", O_PATH);
        lo.root.nlookup = 2;
        if (lo.root.fd == -1)