From: Matthew Fernandez <matthew.fernandez@nicta.com.au>
To: <musl@lists.openwall.com>
Cc: Rich Felker <dalias@aerifal.cx>
Subject: Re: Use of size_t and ssize_t in mseek
Date: Sat, 29 Jun 2013 23:38:09 +1000 [thread overview]
Message-ID: <51CEE341.9000409@nicta.com.au> (raw)
In-Reply-To: <20130629041316.GG29800@brightrain.aerifal.cx>
On 29/06/13 14:13, Rich Felker wrote:
> If size_t is 64-bit, there is fundamentally no way a memory buffer (or
> disk file) larger than SSIZE_MAX can be accessed, since off_t cannot
> store the position in the file. I noticed this as soon as I went to
> write:
>
> case SEEK_SET:
> if (off < 0 || off > c->size) goto fail;
>
> I could still salvage the 32-bit case by simply leaving the code alone
> except for changing base to off_t, but I'm starting to remember why I
> thought it was bogus to even consider allowing object sizes greater
> than the signed size max...
>
> Not sure what the best way to proceed is.
I still don't see the barrier to introducing a check for size greater
than SSIZE_MAX in fmemopen and leaving mseek as is. Am I missing something?
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next prev parent reply other threads:[~2013-06-29 13:38 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-27 3:52 Matthew Fernandez
2013-06-27 4:10 ` Rich Felker
2013-06-27 4:16 ` Matthew Fernandez
2013-06-27 4:23 ` Rich Felker
2013-06-27 4:31 ` Matthew Fernandez
2013-06-27 15:34 ` Rich Felker
2013-06-28 0:49 ` Matthew Fernandez
2013-06-28 1:22 ` Rich Felker
2013-06-28 1:34 ` Matthew Fernandez
2013-06-28 1:48 ` Rich Felker
2013-06-28 1:56 ` Matthew Fernandez
2013-06-29 4:13 ` Rich Felker
2013-06-29 13:38 ` Matthew Fernandez [this message]
2013-06-29 14:17 ` Rich Felker
2013-06-29 14:56 ` Jens Gustedt
2013-06-29 15:48 ` Rich Felker
2013-06-29 16:01 ` Jens Gustedt
2013-06-29 16:13 ` Rich Felker
2013-06-29 16:39 ` Jens Gustedt
2013-07-04 1:28 ` Rich Felker
2013-07-04 6:11 ` Jens Gustedt
2013-07-04 6:37 ` Rich Felker
2013-07-04 7:11 ` Jens Gustedt
2013-07-04 8:12 ` Rich Felker
2013-07-04 8:45 ` Jens Gustedt
2013-07-04 15:24 ` Rich Felker
2013-07-04 11:10 ` Szabolcs Nagy
2013-07-04 11:58 ` Jens Gustedt
2013-07-04 15:26 ` Rich Felker
2013-06-27 10:35 ` Szabolcs Nagy
2013-06-27 15:05 ` Rich Felker
2013-06-27 16:47 ` Rich Felker
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