bugGNU Screen - Bugs: bug #45715, read access violation in MScrollH()


bug #45715: read access violation in MScrollH()

Submitted by:  Kuang-che Wu <kcwu>
Submitted on:  Fri 07 Aug 2015 02:39:46 PM UTC  
Category:  Crash/Freeze/Infloop Severity:  3 - Normal
Priority:  5 - Normal Status:  None
Privacy:  Public Assigned to:  None
Open/Closed:  Open Release:  None
Fixed Release:  None Planned Release:  None
Work Required:  None

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Fri 07 Aug 2015 02:39:46 PM UTC, original submission:  

Reproduce step
$ screen -D -m printf '\x1b[8;;1t\xe3\x80\xb4\x1b[P'

This crashed inside MScrollH with n=-1
at line
    clear_mline(ml, xe + 1 - n, n);
which calls memmove and n*4 as size.

this is detected by afl-fuzz

Kuang-che Wu <kcwu>


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