From: Peter Staubach <staubach@redhat.com>
To: "Tomar, Nagendra" <nagendra_tomar@adaptec.com>
Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.arm.linux.org.uk
Subject: Re: Zeroed pages returned for heap
Date: Tue, 07 Jun 2005 11:57:06 -0400 [thread overview]
Message-ID: <42A5C3D2.9010209@redhat.com> (raw)
In-Reply-To: <Pine.LNX.4.44.0506070936530.4569-100000@localhost.localdomain>
Nagendra Singh Tomar wrote:
>Hi all,
> The short version first.
>Is it OK for an application (a C library implementing malloc/calloc is
>also an application) to assume that the pages returned by the OS for heap
>allocation (either directly thru brk() or thru mmap(MAP_ANONYMOUS)) will
>be zero filled.
>
An application which makes assumptions about the contents of newly allocated
memory would seem to be making very dangerous assumptions.
Ignoring that, would it not be considered to be a security violation to hand
pieces of memory to applications without erasing the old contents of the
pages?
Thanx...
ps
next prev parent reply other threads:[~2005-06-07 16:02 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-07 4:23 Zeroed pages returned for heap Nagendra Singh Tomar
2005-06-07 8:53 ` Ulrich Drepper
2005-06-07 9:59 ` Nagendra Singh Tomar
2005-06-07 15:57 ` Peter Staubach [this message]
2005-06-08 4:08 ` Nagendra Singh Tomar
2005-06-09 10:14 ` Richard B. Johnson
2005-06-10 4:06 ` Nagendra Singh Tomar
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