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Re: [PATCH] Use size_t for variable list size and length


From: Roman Rakus
Subject: Re: [PATCH] Use size_t for variable list size and length
Date: Sun, 02 Dec 2012 16:53:30 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:13.0) Gecko/20120605 Thunderbird/13.0

On 12/01/2012 02:47 AM, Chet Ramey wrote:
On 11/29/12 5:07 AM, Roman Rakus wrote:
see 
https://www.securecoding.cert.org/confluence/display/seccode/INT32-C.+Ensure+that+operations+on+signed+integers+do+not+result+in+overflow
I've actually read this.

I'm skeptical that this change has any practical effect at all.  I'd like
to see a case where the use of ints in this struct causes overflow, even
on a 32-bit machine.

Chet
Hi chet,
you're right, it has no practical effect - rather esthetical. If I'm calculating it well the case should contain more than 536870912 variables (2^32/8). I have no access to 32-bit machine right now, but I can try to run following script:

for ((i=0; i<$((2**32/8 +1)); i++))
do
  eval "a$i=a$i"
done

RR



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