Re: brk randomization breaks columns

[Pavel Machek]

Hi!

> diff --git a/mm/mmap.c b/mm/mmap.c
> index 8295577..1c3b48f 100644
> --- a/mm/mmap.c
> +++ b/mm/mmap.c
> @@ -241,7 +241,7 @@ asmlinkage unsigned long sys_brk(unsigned long brk)
>  
>  	down_write(&mm->mmap_sem);
>  
> -	if (brk < mm->end_code)
> +	if (brk < mm->start_brk)
>  		goto out;
>  
>  	/*

Sorry, I now tested the patch. It looked good to my untrained eyes,
but upon testing it on columns:

...
personality(PER_LINUX)                  = 4194304
geteuid()                               = 1000
getuid()                                = 1000
getgid()                                = 1002
getegid()                               = 1002
brk(0x8054098)                          = 0x922d000
--- SIGSEGV (Segmentation fault) @ 0 (0) ---

...it should have said -EINVAL or something like that.

									Pavel
-- 
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(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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