incomplete fix: whitelisting of symlinks to other home dirs

belongs to previous commit 51eeef2059f00de117472046601e10a9fd958d51

short summary of the new behavior, which should catch a few corner cases better:
- a non-existant file in another homedir (say homedirs are "/foo/user" and "/foo/user2") is silently ignored (previously a tmpfs was
  mounted on the users homedir, which was wrong)
- a symlink pointing to an existing file in another homedir now works (but the link will be always dangling; you need --allusers to see this)
- a symlink pointing back to the entire homedir now works as expected

1 files changed, 1 insertions, 1 deletions

diff --git a/src/firejail/fs_whitelist.c b/src/firejail/fs_whitelist.c
index 2d4640430..6dd4a7e2d 100644
--- a/src/firejail/fs_whitelist.c
+++ b/src/firejail/fs_whitelist.c
@@ -430,7 +430,7 @@ void fs_whitelist(void) {
 
                         // if 1 the file was not found; mount an empty directory
                         if (!nowhitelist_flag) {
-                                if (strncmp(new_name, cfg.homedir, strlen(cfg.homedir)) == 0) {
+                                if (strncmp(new_name, cfg.homedir, strlen(cfg.homedir)) == 0 && new_name[strlen(cfg.homedir)] == '/') {
                                         if(!arg_private)
                                                 home_dir = 1;
                                 }