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Use StrNCpy not strncpy to fill hash key, to ensure the resulting key

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is null-terminated.  I think this is not a real bug because the parser
would always have truncated the identifier to NAMEDATALEN-1 already,
but let's be safe.  Per report from Klocwork.
This commit is contained in:
Tom Lane 2004-12-03 21:26:31 +00:00
parent 2ee3a720a4
commit 8090616847
1 changed files with 3 additions and 5 deletions
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8
src/backend/commands/prepare.c
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@ -10,7 +10,7 @@
* Copyright (c) 2002-2004, PostgreSQL Global Development Group * Copyright (c) 2002-2004, PostgreSQL Global Development Group
* *
* IDENTIFICATION * IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/commands/prepare.c,v 1.33 2004/10/25 00:46:40 neilc Exp $ * $PostgreSQL: pgsql/src/backend/commands/prepare.c,v 1.34 2004/12/03 21:26:31 tgl Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -296,8 +296,7 @@ StorePreparedStatement(const char *stmt_name,
/* Check for pre-existing entry of same name */ /* Check for pre-existing entry of same name */
/* See notes in FetchPreparedStatement */ /* See notes in FetchPreparedStatement */
MemSet(key, 0, sizeof(key)); StrNCpy(key, stmt_name, sizeof(key));
strncpy(key, stmt_name, sizeof(key));
hash_search(prepared_queries, key, HASH_FIND, &found); hash_search(prepared_queries, key, HASH_FIND, &found);
@ -370,8 +369,7 @@ FetchPreparedStatement(const char *stmt_name, bool throwError)
* the hash package is picky enough that it needs to be * the hash package is picky enough that it needs to be
* NULL-padded out to the appropriate length to work correctly. * NULL-padded out to the appropriate length to work correctly.
*/ */
MemSet(key, 0, sizeof(key)); StrNCpy(key, stmt_name, sizeof(key));
strncpy(key, stmt_name, sizeof(key));
entry = (PreparedStatement *) hash_search(prepared_queries, entry = (PreparedStatement *) hash_search(prepared_queries,
key, key,