Mailinglist Archive: opensuse-bugs (4202 mails)

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https://bugzilla.novell.com/show_bug.cgi?id=740484

https://bugzilla.novell.com/show_bug.cgi?id=740484#c0


           Summary: mawk RE matching can return invalid results causing
                    unexpected behavior and crashes
    Classification: openSUSE
           Product: openSUSE 12.1
           Version: Final
          Platform: Other
        OS/Version: Other
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: Basesystem
        AssignedTo: bnc-team-screening@xxxxxxxxxxxxxxxxxxxxxx
        ReportedBy: gber@xxxxxxxxxxxx
         QAContact: qa@xxxxxxx
          Found By: ---
           Blocker: ---


Created an attachment (id=470460)
 --> (http://bugzilla.novell.com/attachment.cgi?id=470460)
chngeset containing the fix for REmatch()

User-Agent:       Mozilla/5.0 (X11; Linux x86_64; rv:9.0.1) Gecko/20100101
Firefox/9.0.1

RE matching in mawk 1.3.4 can return invalid results leading to incorrect
RSTART and RLENGTH or trigger unexpected behavior up to crashes.
E.g. when running mawk 'BEGIN{x="a";sub(/[^a]/,"", x)}' REmatch() returns an
invalid match leading to an integer underflow which in turn causes a segfault
in a subsequent memcpy() call.

This bug had been fixed in the 1.3.4.20100224 snapshot release, through
bisecting Thomas Dickey identified the attached changeset. 

Reproducible: Always

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