CVS commit: src/external/historical/nawk/dist

["Kamil Rytarowski" <kamil%netbsd.org@localhost>]

Module Name:    src
Committed By:   kamil
Date:           Tue Jun 12 13:24:28 UTC 2018

Modified Files:
        src/external/historical/nawk/dist: lex.c

Log Message:
Do not use index out of bounds in nawk

$ awk '{w=$1}' < /dev/null
/public/src.git/external/historical/nawk/bin/../dist/lex.c:476:16: runtime error: index -1 out of bounds for type 'const Keyword [46]'

There used to be documented a bug in the code that index ouf of bounds
can in theory fault (by daniel barrett).

Before assigning the pointer, first check for the index whether it's not
not -1. This was a suggested solution in the comment in the code.

The sanitizer is overcautious as this pointer wasn't dereferenced, but
fix is nonetheless.

Sponsored by <The NetBSD Foundation>


To generate a diff of this commit:
cvs rdiff -u -r1.3 -r1.4 src/external/historical/nawk/dist/lex.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.