[Bug 21573] New: Need heap overrun detection at beginning of buffers, too

http://bugs.winehq.org/show_bug.cgi?id=21573

           Summary: Need heap overrun detection at beginning of buffers,
                    too
           Product: Wine
           Version: 1.1.37
          Platform: x86
        OS/Version: Linux
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: ntdll
        AssignedTo: wine-bugs(a)winehq.org
        ReportedBy: dank(a)kegel.com


On Linux, valgrind gives nice warnings when you access before
the first byte.  It'd be nice if valgrinding Windows apps under Wine
gave the same warnings.  For instance, the following program should
give three warnings under valgrind+wine just as it does under valgrind:

#include <stdio.h>
#include <stdlib.h>

int badness_before_n_after ( char* p )
{
 return p[-1] + p[10];
}

int main ( void )
{
 char* p = malloc(10);
 int who_knows = badness_before_n_after(p);
 // expect 2 x invalid address yelpage
 who_knows += p[5];
 if (who_knows == 42)
   printf("It's 42 (!)\n");
 else
   printf("It's not 42 (dull but unsurprising)\n");
 free(p);
 return 0;
}

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[Bug 21573] Need heap overrun detection at beginning of buffers, too

http://bugs.winehq.org/show_bug.cgi?id=21573





--- Comment #1 from Dan Kegel <dank(a)kegel.com>  2010-02-01 17:08:27 ---
Created an attachment (id=26017)
 --> (http://bugs.winehq.org/attachment.cgi?id=26017)
rough draft - add redzone at beginning of allocations

Here's a quick unfinished draft of how one might go
about adding this.  I got as far as making space for
the redzone, but didn't fill it or tell valgrind about it,
but it's not quite correct.

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[Bug 21573] Need heap overrun detection at beginning of buffers, too

http://bugs.winehq.org/show_bug.cgi?id=21573


Julian Seward <jseward(a)acm.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jseward(a)acm.org




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[Bug 21573] Need heap overrun detection at beginning of buffers, too

http://bugs.winehq.org/show_bug.cgi?id=21573

--- Comment #2 from butraxz(a)gmail.com 2013-06-27 12:37:18 CDT ---
This ticket has not been updated for over 900 days. 

Is this still an issue in wine version 1.6-rc3 or higher or is this to be
closed as abandoned ?

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[Bug 21573] Need heap overrun detection at beginning of buffers, too

https://bugs.winehq.org/show_bug.cgi?id=21573

Austin English <austinenglish(a)gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |download, patch

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