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

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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>

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

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

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