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From: "bryanmcsp at gmail dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug libc/10149] stack guard should lead with zero byte to gain protections from str* writes
Date: Wed, 10 Nov 2021 14:12:36 +0000	[thread overview]
Message-ID: <bug-10149-131-fJoHx0PJB3@http.sourceware.org/bugzilla/> (raw)
In-Reply-To: <bug-10149-131@http.sourceware.org/bugzilla/>

https://sourceware.org/bugzilla/show_bug.cgi?id=10149

Takkelink <bryanmcsp at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bryanmcsp at gmail dot com

--- Comment #10 from Takkelink <bryanmcsp at gmail dot com> ---
When building the stack guard, it has been traditionally important to have the
value start (in memory) with a zero byte to protect the guard value (and the
rest of the stack past it) from being read via strcpy, etc.

This patch reduces the number of random bytes by one, leaving the leading zero
byte. https://www.kildarehousebuilders.ie

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  parent reply	other threads:[~2021-11-10 14:12 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <bug-10149-131@http.sourceware.org/bugzilla/>
2011-05-15 15:01 ` drepper.fsp at gmail dot com
2014-07-01 20:34 ` fweimer at redhat dot com
2021-09-05  7:39 ` kimolsun2020 at yahoo dot com
2021-09-10 19:36 ` mehmetgelisin at aol dot com
2021-09-10 19:51 ` mark at klomp dot org
2021-10-09 11:00 ` gulsenenginar at aol dot com
2021-10-19  7:15 ` progonsaytu at gmail dot com
2021-10-21  6:45 ` bap.fayol at gmail dot com
2021-10-21 10:43 ` adhemerval.zanella at linaro dot org
2021-10-24 10:03 ` glassmtech at ukr dot net
2021-11-10 14:12 ` bryanmcsp at gmail dot com [this message]
2009-05-12 18:05 [Bug libc/10149] New: stack guard should lead with zero byte to gain protections from str* reads kees at outflux dot net
2009-05-14 21:50 ` [Bug libc/10149] stack guard should lead with zero byte to gain protections from str* writes kees at outflux dot net

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