commit e2af0fd164e80777a70ea292bb5871329a0f8cd2
from: Stefan Sperling <stsp@stsp.name>
date: Thu Aug 08 23:13:13 2019 UTC

prevent silly use-after-free with root cause in collect_commit_logmsg()

commit - 003cc5a3616707763b05246329fd137ad887c3b9
commit + e2af0fd164e80777a70ea292bb5871329a0f8cd2
blob - 2d491b86591c59df3a408119c74dfa30aa5287e8
blob + 0476470fdaf1cd3d39c311d297a739bb61922472
--- got/got.c
+++ got/got.c
@@ -3419,8 +3419,11 @@ collect_commit_logmsg(struct got_pathlist_head *commit
 
 	err = edit_logmsg(logmsg, a->editor, a->logmsg_path, initial_content);
 done:
-	unlink(a->logmsg_path);
-	free(a->logmsg_path);
+	if (err == NULL || err->code == GOT_ERR_COMMIT_MSG_EMPTY) {
+		unlink(a->logmsg_path);
+		free(a->logmsg_path);
+		a->logmsg_path = NULL;
+	}
 	free(initial_content);
 	free(template);