pgsql: Fix one-byte buffer overrun in contrib/test_parser.

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: pgsql-committers(at)postgresql(dot)org
Subject: pgsql: Fix one-byte buffer overrun in contrib/test_parser.
Date: 2012-01-10 00:59:01
Message-ID: E1RkQ3J-0005bv-Cp@gemulon.postgresql.org
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Fix one-byte buffer overrun in contrib/test_parser.

The original coding examined the next character before verifying that
there *is* a next character. In the worst case with the input buffer
right up against the end of memory, this would result in a segfault.

Problem spotted by Paul Guyot; this commit extends his patch to fix an
additional case. In addition, make the code a tad more readable by not
overloading the usage of *tlen.

Branch
------
REL9_1_STABLE

Details
-------
http://git.postgresql.org/pg/commitdiff/d427e75e51d9e7d76fc2a4bc142ba7be852a1078

Modified Files
--------------
contrib/test_parser/test_parser.c | 19 ++++++++++---------
1 files changed, 10 insertions(+), 9 deletions(-)

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