URL: <https://savannah.gnu.org/bugs/?66522>
Summary: Reattaching to other user's session results in
"seteuid: Operation not permitted" and segfault in 5.0.0
Group: GNU Screen
Submitter: None
Submitted: Tue 03 Dec 2024 09:11:11 AM UTC
Category: Crash/Freeze/Infloop
Severity: 3 - Normal
Priority: 5 - Normal
Status: None
Privacy: Public
Assigned to: None
Open/Closed: Open
Discussion Lock: Any
Release: 5.0.0
Fixed Release: None
Planned Release: None
Work Required: None
_______________________________________________________
Follow-up Comments:
-------------------------------------------------------
Date: Tue 03 Dec 2024 09:11:11 AM UTC By: Anonymous
Screen version: 5.0.0
Tested systems:
Manjaro - 6.10.13-3-MANJARO #1 SMP PREEMPT_DYNAMIC x86_64 (arch packaged
version and also compiled manually from tarball)
Lubuntu - 6.8.0-41-generic #41-Ubuntu SMP PREEMPT_DYNAMIC x86_64 (manually
compiled)
Trying to reattach to a screen session started by other user results in many
"seteuid: Operation not permitted" errors and then segfault. It was working
correctly in screen 4.9.1.
I remember one bug related to multiuser sessions that was fixed in 2020 in
v4.9.0 (bug #37437) - that may be unrelated to this, but worth checking if
that works in v5.0.0. Right now I'm also getting the bug #66142 crash when
trying "-X stuff", even on screen compiled from tarball.
Reproduction:
As user1:
screen -S test
^A:multiuser on
^A:acladd user2
As user2:
screen -r user1/test
Effect:
seteuid: Operation not permitted
seteuid: Operation not permitted
seteuid: Operation not permitted
seteuid: Operation not permitted
(...)
seteuid: Operation not permitted
seteuid: Operation not permitted
seteuid: Operation not permitted
seteuid: Operation not permitted
seteuid: Operation not permitted
Segmentation fault (core dumped)
_______________________________________________________
Reply to this item at:
<https://savannah.gnu.org/bugs/?66522>
_______________________________________________
Message sent via Savannah
https://savannah.gnu.org/
signature.asc
Description: PGP signature
