Hello, I acutally run a shell script /root/foo.sh which runs several commands. Maybe that is a difference. And I only use FTPS to connect.
Regards, Markus Am 12.07.24 um 09:33 schrieb Christian Ehrhardt : > Hi, > first of all thanks for all the prep work. > The patch LGTM and I agree we should add it. > I was happy to see the suggestions on how to reproduce, but while writing it > out in more detail could not reproduce the hang. The following are the steps > I drafted to an SRU templates "how to test and verify" steps. But the hang > does not occur. Could you have a look where my steps diverge from what you > had in mind? > > > # Install ftp server > $ sudo apt install vsftpd > > # set a user with password, I use ubuntu:ubuntu in the examples here > $ passwd ubuntu > > # add testfile to the users home dir > $ echo foobar > /home/ubuntu/egal > > # Check with FTP if the normal setup works > root@o:~# ftp 127.0.0.1 > Connected to 127.0.0.1. > 220 (vsFTPd 3.0.5) > Name (127.0.0.1:root): ubuntu > 331 Please specify the password. > Password: > 230 Login successful. > Remote system type is UNIX. > Using binary mode to transfer files. > ftp> dir > 229 Entering Extended Passive Mode (|||47570|) > 150 Here comes the directory listing. > -rw-r--r-- 1 0 0 7 Jul 12 06:59 egal > 226 Directory send OK. > ftp> get egal > local: egal remote: egal > 229 Entering Extended Passive Mode (|||21047|) > 150 Opening BINARY mode data connection for egal (7 bytes). > 100% > |**************************************************************************************************************************************************| > 7 45.87 KiB/s 00:00 ETA > 226 Transfer complete. > 7 bytes received in 00:00 (8.49 KiB/s) > ftp> ^D > 221 Goodbye. > root@o:~# cat egal > foobar > root@o:~# rm egal > > > # Now set up the failure condition > #1 add a few exec commands on pam > $ echo "account optional pam_exec.so debug quiet /bin/true" | sudo > tee -a /etc/pam.d/vsftpd > > # Restart server to be sure to pick up everything > $ sudo systemctl restart vsftpd.service > > # Log in again to see the hang > $ ftp 127.0.0.1 > > ^^ but this does not fall into the hang, I can get the file and quit > normally. > > It is not that the setup is totally useless, in /var/log/auth.log I see on > the login > 2024-07-12T07:27:01.030634+00:00 o vsftpd: pam_exec(vsftpd:account): Calling > /bin/true ... > > > Do you have an advice what you do different to reproduce the issue? > > > P.S. along evaluating this I found many more changes we should apply to our > ftp servers. Not all suitable for SRUs, but going forward I want to still > improve them. To find the required time for that effort I internally filed > SD-1755 to not fall through the cracks forever. > > ** Changed in: vsftpd (Ubuntu) > Status: Triaged => Incomplete > -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2069324 Title: vsftpd hangs with SIGCHLD when pam_exec.so is used To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/vsftpd/+bug/2069324/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
