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Date: Tue, 13 Oct 2015 18:31:20 -0500 (EST)
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From: schwarze@mdocml.bsd.lv
To: source@mdocml.bsd.lv
Subject: mdocml: Reject the escape sequences \[uD800] to \[uDFFF] in the parser.
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Log Message:
-----------
Reject the escape sequences \[uD800] to \[uDFFF] in the parser.
These surrogates are not valid Unicode codepoints,
so treat them just like any other undefined character escapes:
Warn about them and do not produce output.
Issue noticed while talking to stsp@, semarie@, and bentley@.

Modified Files:
--------------
    mdocml:
        mandoc.c

Revision Data
-------------
Index: mandoc.c
===================================================================
RCS file: /home/cvs/mdocml/mdocml/mandoc.c,v
retrieving revision 1.95
retrieving revision 1.96
diff -Lmandoc.c -Lmandoc.c -u -p -r1.95 -r1.96
--- mandoc.c
+++ mandoc.c
@@ -333,6 +333,9 @@ mandoc_escape(const char **end, const ch
 			break;
 		if (*sz == 6 && (*start)[1] == '0')
 			break;
+		if (*sz == 5 && (*start)[1] == 'D' &&
+		    strchr("89ABCDEF", (*start)[2]) != NULL)
+			break;
 		if ((int)strspn(*start + 1, "0123456789ABCDEFabcdef")
 		    + 1 == *sz)
 			gly = ESCAPE_UNICODE;
--
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