bugGNU roff - Bugs: bug #65248, [eqn] doesn't detect recursive...

 
 

bug #65248: [eqn] doesn't detect recursive macro definitions, permitting infinite loops

Submitter:  G. Branden Robinson <gbranden>
Submitted:  Sun 04 Feb 2024 05:48:08 AM UTC
   
 
Category:  Preprocessor eqn Severity:  4 - Important
Item Group:  Crash/Unresponsive Status:  None
Privacy:  Public Assigned to:  None
Open/Closed:  Open Planned Release:  None
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Sun 04 Feb 2024 05:48:08 AM UTC, original submission:  

Noticed by Ingo Schwarze in mandoc CVS.


.EQ
define inner "content"
define outer "inner outer"
outer
.EN

This endless loop was found by tb@ using afl(1).

Incidentally, GNU eqn(1) also performs an infinite loop in this
situation and then crashes when memory runs out, but that's not an
excuse for nasty behaviour of mandoc(1).


G. Branden Robinson <gbranden>
Group administrator

 

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