[pcre-dev] [Bug 1100] New: Crash backtracking over unicode s…

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http://bugs.exim.org/show_bug.cgi?id=1100
           Summary: Crash backtracking over unicode sequence
           Product: PCRE
           Version: 8.11
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Severity: bug
          Priority: medium
         Component: Code
        AssignedTo: ph10@???
        ReportedBy: tom@???
                CC: pcre-dev@???

Created an attachment (id=470)
--> (http://bugs.exim.org/attachment.cgi?id=470)
Test file demonstating crash

When matching unicode properties PCRE 8.12 will sometimes backtrack past the
beginning of the subject string, causing invalid memory reads and/or crashes.

The attached file contains an example of one such match which can be fed to
pcretest to cause it to crash, or at least to report invalid accesses when run
under valgrind.


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