mpirun is terminated saying stack smashing detected when hostname is long

[ktns]

Background information

What version of Open MPI are you using? (e.g., v4.1.6, v5.0.1, git branch name and hash, etc.)

both

• 4.1.6-7ubuntu2 on ubuntu 24.04
• 4.1.8 built from source on ubuntu 24.04

Describe how Open MPI was installed (e.g., from a source/distribution tarball, from a git clone, from an operating system distribution package, etc.)

• apt-get install
• built from source tarball

If you are building/installing from a git clone, please copy-n-paste the output from git submodule status.

Please describe the system on which you are running

• Operating system/version: ubuntu 24.04
• Computer hardware: Intel(R) Xeon(R) Gold 6254 / ThinkPad X1 nano gen1
• Network type: n/a

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Details of the problem

When hostname is longer than 56 characters, mpirun is immediately terminated saying

*** stack smashing detected ***: terminated

I found it in a k8s pod with openmpi 4.1.8 built from source tarball, but I can reproduce it with 4.1.6-ubuntu2 installed via apt-get on ubuntu 24.04 in a docker container.

docker run --rm -h dpzwksxgqlelrdfraudrnnjnpwvsfxgeqozkukzhzlkzfyfotdsuflkja ubuntu:24.04 bash -c 'apt-get update ; apt-get install openmpi-bin -y ; mpirun --allow-run-as-root -np 2 true'
....
*** stack smashing detected ***: terminated
[dpzwksxgqlelrdfraudrnnjnpwvsfxgeqozkukzhzlkzfyfotdsuflkja:00001] *** Process received signal ***
[dpzwksxgqlelrdfraudrnnjnpwvsfxgeqozkukzhzlkzfyfotdsuflkja:00001] Signal: Segmentation fault (11)
[dpzwksxgqlelrdfraudrnnjnpwvsfxgeqozkukzhzlkzfyfotdsuflkja:00001] Signal code:  (128)
[dpzwksxgqlelrdfraudrnnjnpwvsfxgeqozkukzhzlkzfyfotdsuflkja:00001] Failing at address: (nil)
[dpzwksxgqlelrdfraudrnnjnpwvsfxgeqozkukzhzlkzfyfotdsuflkja:00001] [ 0] /lib/x86_64-linux-gnu/libc.so.6(+0x45330)[0x7b6da6245330]
[dpzwksxgqlelrdfraudrnnjnpwvsfxgeqozkukzhzlkzfyfotdsuflkja:00001] [ 1] /lib/x86_64-linux-gnu/libc.so.6(abort+0x182)[0x7b6da62289a2]
[dpzwksxgqlelrdfraudrnnjnpwvsfxgeqozkukzhzlkzfyfotdsuflkja:00001] [ 2] /lib/x86_64-linux-gnu/libc.so.6(+0x297b6)[0x7b6da62297b6]
[dpzwksxgqlelrdfraudrnnjnpwvsfxgeqozkukzhzlkzfyfotdsuflkja:00001] [ 3] /lib/x86_64-linux-gnu/libc.so.6(+0x136c19)[0x7b6da6336c19]
[dpzwksxgqlelrdfraudrnnjnpwvsfxgeqozkukzhzlkzfyfotdsuflkja:00001] [ 4] /lib/x86_64-linux-gnu/libc.so.6(+0x137ea4)[0x7b6da6337ea4]
[dpzwksxgqlelrdfraudrnnjnpwvsfxgeqozkukzhzlkzfyfotdsuflkja:00001] [ 5] /usr/lib/x86_64-linux-gnu/openmpi/lib/openmpi3/mca_regx_fwd.so(+0x2404)[0x7b6da3b40404]
[dpzwksxgqlelrdfraudrnnjnpwvsfxgeqozkukzhzlkzfyfotdsuflkja:00001] [ 6] /lib/x86_64-linux-gnu/libopen-rte.so.40(orte_odls_base_default_get_add_procs_data+0x156)[0x7b6da659fce6]
[dpzwksxgqlelrdfraudrnnjnpwvsfxgeqozkukzhzlkzfyfotdsuflkja:00001] [ 7] /lib/x86_64-linux-gnu/libopen-rte.so.40(orte_plm_base_launch_apps+0x1aa)[0x7b6da65a9bba]
[dpzwksxgqlelrdfraudrnnjnpwvsfxgeqozkukzhzlkzfyfotdsuflkja:00001] [ 8] /lib/x86_64-linux-gnu/libevent_core-2.1.so.7(+0x1f2a8)[0x7b6da646e2a8]
[dpzwksxgqlelrdfraudrnnjnpwvsfxgeqozkukzhzlkzfyfotdsuflkja:00001] [ 9] /lib/x86_64-linux-gnu/libevent_core-2.1.so.7(event_base_loop+0x4af)[0x7b6da646ffaf]
[dpzwksxgqlelrdfraudrnnjnpwvsfxgeqozkukzhzlkzfyfotdsuflkja:00001] [10] mpirun(+0x128c)[0x581b3fb3028c]
[dpzwksxgqlelrdfraudrnnjnpwvsfxgeqozkukzhzlkzfyfotdsuflkja:00001] [11] /lib/x86_64-linux-gnu/libc.so.6(+0x2a1ca)[0x7b6da622a1ca]
[dpzwksxgqlelrdfraudrnnjnpwvsfxgeqozkukzhzlkzfyfotdsuflkja:00001] [12] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x8b)[0x7b6da622a28b]
[dpzwksxgqlelrdfraudrnnjnpwvsfxgeqozkukzhzlkzfyfotdsuflkja:00001] [13] mpirun(+0x1415)[0x581b3fb30415]
[dpzwksxgqlelrdfraudrnnjnpwvsfxgeqozkukzhzlkzfyfotdsuflkja:00001] *** End of error message ***