From 28b5692e9ab3dbb07e4d6b8e44b370637c04ba86 Mon Sep 17 00:00:00 2001

From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>

Date: Sat, 7 Mar 2015 14:19:20 -0500

Subject: [PATCH] nspawn: fix use-after-free and leak in error paths

CID #1257765.

(cherry picked from commit 8a16a7b4e7f6702a7e6edaead80ecf04be7d3ba2)

---

 src/nspawn/nspawn.c | 4 ++--

 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/nspawn/nspawn.c b/src/nspawn/nspawn.c

index 7724df96bd..78bd584834 100644

--- a/src/nspawn/nspawn.c

+++ b/src/nspawn/nspawn.c

@@ -3627,7 +3627,7 @@ int main(int argc, char *argv[]) {

                 }

                 if (arg_ephemeral) {

-                        char *np;

+                        _cleanup_free_ char *np = NULL;

                         /* If the specified path is a mount point we

                          * generate the new snapshot immediately

@@ -3657,13 +3657,13 @@ int main(int argc, char *argv[]) {

                         r = btrfs_subvol_snapshot(arg_directory, np, arg_read_only, true);

                         if (r < 0) {

-                                free(np);

                                 log_error_errno(r, "Failed to create snapshot %s from %s: %m", np, arg_directory);

                                 goto finish;

                         }

                         free(arg_directory);

                         arg_directory = np;

+                        np = NULL;

                         remove_subvol = true;