commit f6d88e1a0cac5d10deaafff839c36f2a9860dd8c
from: Stefan Sperling <stsp@stsp.name>
date: Wed May 29 12:45:50 2019 UTC

fix lack of NUL termination of a path; bug exposed by new realpath(3)

commit - 5e70831eb7375e5fea42a487fb5df1e7640ea982
commit + f6d88e1a0cac5d10deaafff839c36f2a9860dd8c
blob - c0b4a22f88ac66488a7663be09009008dd5b3cd0
blob + f8c67ee6313435224cec826561679a4f712b822e
--- lib/worktree.c
+++ lib/worktree.c
@@ -1880,11 +1880,17 @@ got_worktree_resolve_path(char **wt_path, struct got_w
 		goto done;
 	}
 
-	path = strdup(resolved +
-	    strlen(got_worktree_get_root_path(worktree)) + 1 /* skip '/' */);
-	if (path == NULL) {
-		err = got_error_from_errno("strdup");
-		goto done;
+	if (strlen(resolved) > strlen(got_worktree_get_root_path(worktree))) {
+		err = got_path_skip_common_ancestor(&path,
+		    got_worktree_get_root_path(worktree), resolved);
+		if (err)
+			goto done;
+	} else {
+		path = strdup("");
+		if (path == NULL) {
+			err = got_error_from_errno("strdup");
+			goto done;
+		}
 	}
 
 	/* XXX status walk can't deal with trailing slash! */