chroot fix

1 files changed, 10 insertions, 0 deletions

diff --git a/src/firejail/fs.c b/src/firejail/fs.c
index 5bcfa6066..86126672e 100644
--- a/src/firejail/fs.c
+++ b/src/firejail/fs.c
@@ -1064,6 +1064,16 @@ int fs_check_chroot_dir(const char *rootdir) {
         struct stat s;
         char *name;
 
+        // rootdir has to be owned by root
+        if (stat(rootdir, &s) != 0) {
+                fprintf(stderr, "Error: cannot find chroot directory\n");
+                return 1;
+        }
+        if (s.st_uid != 0) {
+                fprintf(stderr, "Error: chroot directory should be owned by root\n");
+                return 1;
+        }
+
         // check /dev
         if (asprintf(&name, "%s/dev", rootdir) == -1)
                 errExit("asprintf");