Segfaults with netqmail, ucspi-ssl and TLS

I am running netqmail patched for with TLS support under sslserver from the ucspi-ssl package.

However, every time a connection is closed the sslserver process segfaults. On the Opteron it also causes messages like 
sslserver[13106] general protection rip:2ab6c23cf687 rsp:7fffe89e9308 error:0
to appear in my system log.

Currently tracing the problem, but it seems that the process dedicated to handling the encryption assumes that it has to start an encrypted connection even though it has not been requested to do so. I'll have to dig around a bit more.

Update: I also have a very trivial patch that fixes the issue. I've been running with it for over an year now and there have been no issues so it should be safe.
Here is the file:
ucspi-ssl-070-fixsegfault.patch

Comments

  1. chutzJanuary 31, 2007 at 6:59 PM

    It was a problem in the TLS patch. When the child process exits (the qmail-smtp process), the parent process responsible for the encrypted communication receives a nothing on its control file descriptor... a nothing that it does not check is nothing. It thus ends up using this nothing to initiate a SSL context and naturally the kernel gets angry.

    ReplyDelete

Post a Comment

Popular posts from this blog

Installing Gentoo with full disk encryption

The purpose of this exercise - install Gentoo where all disk partitions are encrypted. Boot from a system rescue disk and partition the disk - use GPT partition table where the first partition is reserved, second is the boot, and the third one is for the rest of the data. Device Start End Sectors Size Type /dev/sda1 2048 32767 30720 15M BIOS boot /dev/sda2 32768 442367 409600 200M Linux filesystem /dev/sda3 442368 375093902 374651535 178.7G Linux filesystem Encrypt partitions number 2 and 3, and open them cryptsetup luksFormat /dev/sda2 cryptsetup luksFormat /dev/sda3 cryptsetup luksOpen /dev/sda2 crypt_boot cryptsetup luksOpen /dev/sda3 crypt_data Format the boot partition mkfs.btrfs /dev/mapper/crypt_boot Prepare LVM for the rest, and format the top level vgcreate vg0 /dev/mapper/crypt_data lvcreate -l 100%FREE -n data vg0 mkfs.btrfs /dev/vg0/data Mount and set up any subvolumes mount /dev/vg0/data /mnt/gentoo btrfs subvol create /mnt/gentoo/@ /mnt/gentoo/@home umount /mnt/gentoo Now
Read more

ADSL Router Model CT-5367 user and pass (VIVACOM)

Writing down the username and password for the vivacom ADSL router, in case I need it again. user: root pass: warmWLspot Useful to telnet 192.168.1.1 and then reboot . Originally found at Neo2SHYAlien blog . And here I found passwords for other models, just in case. ZTE ZXDSL 832 username: root password: GSrootaccess ZTE ZXDSL 831 username: root password: GSrootaccess ZTE username: root password: 831access Huawei SmartAX MT882 username: root password: MT882rootaccess ZTE ZXDSL-531b username: root password: rootWLaccess Pirelli – DRG – A124G username: root password: warmWLspot Comtrend CT-5367 username: root password: warmWLspot HG530 Home Gateway username: root password: warmWLspot
Read more

FreeIPA cluster with containers

Notes on how to install a FreeIPA cluster on Ubuntu. Mostly following the instructions on https://github.com/freeipa/freeipa-container Start with what would be the primary host. If you install a third replica you would want to review the replica agreements to ensure you have a two-way replication between all pairs of nodes.
Read more