Mercurial > hg > octave-lyh > gnulib-hg
changeset 5464:f7677662318c
(rpl_calloc): Defend against buggy calloc implementations
that mishandle size_t overflow.
author | Paul Eggert <eggert@cs.ucla.edu> |
---|---|
date | Wed, 17 Nov 2004 23:05:47 +0000 |
parents | 8044da4f6750 |
children | f0ee86da74a7 |
files | lib/calloc.c |
diffstat | 1 files changed, 9 insertions(+), 1 deletions(-) [+] |
line wrap: on
line diff
--- a/lib/calloc.c +++ b/lib/calloc.c @@ -1,4 +1,4 @@ -/* Work around the condition whereby calloc (n, s) fails when n*s is 0. +/* calloc() function that is glibc compatible. This wrapper function is required at least on Tru64 UNIX 5.1. Copyright (C) 2004 Free Software Foundation, Inc. @@ -31,9 +31,17 @@ void * rpl_calloc (size_t n, size_t s) { + size_t bytes; if (n == 0) n = 1; if (s == 0) s = 1; + + /* Defend against buggy calloc implementations that mishandle + size_t overflow. */ + bytes = n * s; + if (bytes / s != n) + return NULL; + return calloc (n, s); }