URL:
<https://savannah.gnu.org/bugs/?58259>
Summary: Memory corruption by terminfo
Project: GNU Screen
Submitted by: mrwitek
Submitted on: Mon 27 Apr 2020 03:14:12 PM UTC
Category: Crash/Freeze/Infloop
Severity: 3 - Normal
Priority: 5 - Normal
Status: None
Privacy: Public
Assigned to: None
Open/Closed: Open
Release: 4.99.0
Discussion Lock: Any
Fixed Release: None
Planned Release: None
Work Required: None
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Details:
In version 4.8.0 screen can corrupt memory when reading terminfo/termcap
files.
I use st terminal <https://st.suckless.org/> with environment variable
TERM=st-256color. If I have compiled st.info (with warnings) from the source
with
tic -o "$HOME/.terminfo" st.info
trying to start screen results in one process becoming a zombie and another
process blocking terminal until I press Ctrl+\.
If I have compiled st.info as recommended in st FAQ
<https://git.suckless.org/st/plain/FAQ> with
tic -o "$HOME/.terminfo" -x st.info
trying to reattach to screen session results in an infinite loop in
_nc_find_type_entry in libncursesw.so.6 (bug #58132)
The problem is not present in version 4.7.0.
Workaround: add " -DTERMCAP_BUFSIZE=2048" to CPPFLAGS environment variable and
reconfigure/rebuild. In that case problem is no longer present.
P.S. bugtracker misses 4.8.0 entry in the release field.
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