bugGNU Screen - Bugs: bug #48983, Crash on new window when the...

 
 

bug #48983: Crash on new window when the terminal type is very long

Submitter:  None
Submitted:  Fri 02 Sep 2016 09:41:54 PM UTC
   
 
Category:  Crash/Freeze/Infloop Severity:  3 - Normal
Priority:  * 5 - Normal Status:  Fixed
Privacy:  Public Assigned to:  None
Open/Closed:  Closed Release:  4.4.0
Fixed Release:  4.5.0 Planned Release:  None
Work Required:  None
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Wed 14 Sep 2016 03:30:08 PM UTC, comment #3: 

Thanks, corrected.

 Amadeusz Sławiński <amade>
Group administrator
Wed 14 Sep 2016 06:53:59 AM UTC, comment #2: 

Note the patch wasn't correctly applied to master. It left both versions of tebuf declared.

http://git.savannah.gnu.org/cgit/screen.git/tree/src/window.c#n904

The screen-v4 branch looks good.

 Anonymous
Sat 10 Sep 2016 10:11:17 AM UTC, comment #1: 

Thanks for patch, applied to screen-v4 and master branches.

 Amadeusz Sławiński <amade>
Group administrator
Fri 02 Sep 2016 09:41:54 PM UTC, original submission:  

screen-4.4.0 built from source using -D_FORTIFY_SOURCE=1 on Fedora 24 crashes when a new window is created using the -T parameter and a sufficiently long string.

The cause seems to be an overflow in the "tebuf" variable and can be fixed with the attached patch. NB: I'm not familiar with the screen source code.

screen does not crash without -D_FORTIFY_SOURCE=1 and it doesn't seem to crash when launching it, but only when creating a new window inside an existing screen session.

I had already reported the bug in the Fedora bugtracker. Initially I was having another problem that turned into the mentioned crash when updating to screen-4.4.0. This is the original bug report:

https://bugzilla.redhat.com/show_bug.cgi?id=1350549

Anonymous

 

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Attached Files
file #38417:  screen-tebuf-fix.diff added by None (829B - text/x-patch)

 

Depends on the following items: None found

Items that depend on this one: None found

 

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    Follow 4 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2017-01-18 amade Open/ClosedOpen Closed
        Fixed ReleaseNone 4.5.0
    2016-09-10 amade StatusNone Fixed
    2016-09-02 None Attached File- Added screen-tebuf-fix.diff, #38417

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