Re: When was ASLR introduced in the Linux kernel?

[Eric Dumazet]

Le mardi 30 novembre 2010 Ã 18:50 +0100, Victor van der Veen a Ãcrit :

> Thanks, but this was not what I was really looking for. However,
> searching for 'randomize_va_space' led me to a thread on lkml started by
> Arjan van de Ven on January 27th, 2005:
> http://lkml.org/lkml/2005/1/27/56
> 
> It would be great if someone can provide more details on this subject:
>   1) when was randomize_va_space introduced? (probably somewhere in
> 2.6.11.x)

	who cares ?

>   2) when was it enabled by default (2.6.12.? but no announcement in
> changelog?)

commit 42a172a814759a29020e5d1ee580bf4eb86afed2
Author: arjan <arjan>
Date:   Sat Mar 5 17:25:41 2005 +0000

    [PATCH] Randomisation: enable by default
    
    Signed-off-by: Arjan van de Ven <arjan@xxxxxxxxxxxxx>
    Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
    Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
    Signed-off-by: Linus Torvalds <torvalds@xxxxxxxx>
    
    BKrev: 4229eb95j12voWjpsZzY2Wlm6P7Mvg

# git describe --contains 42a172a8
v2.6.11.3~887

>   3) which additions were added in later releases? (and when?)


commit 32a932332c8bad842804842eaf9651ad6268e637
Author: Ingo Molnar <mingo@xxxxxxx>
Date:   Wed Feb 6 22:39:44 2008 +0100

    brk randomization: introduce CONFIG_COMPAT_BRK
    
    based on similar patch from: Pavel Machek <pavel@xxxxxx>
    
    Introduce CONFIG_COMPAT_BRK. If disabled then the kernel is free
    (but not obliged to) randomize the brk area.
    
    Heap randomization breaks ancient binaries, so we keep COMPAT_BRK
    enabled by default.
    
    Signed-off-by: Ingo Molnar <mingo@xxxxxxx>

git describe --contains 32a932332c8bad842804842eaf9651ad6268e637
v2.6.25-rc1~513^2~15



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