Re: [PATCH] [RFC] brk randomization: compute RLIMIT_DATA properly (was Re: x86: randomize brk() and RLIMIT_DATA)

[Jan Engelhardt <jengelh@computergmbh.de>]

On Oct 26 2007 13:30, Hugh Dickins wrote:
>> @@ -251,7 +251,8 @@ asmlinkage unsigned long sys_brk(unsigned long brk)
>>  	 * not page aligned -Ram Gupta
>>  	 */
>>  	rlim = current->signal->rlim[RLIMIT_DATA].rlim_cur;
>> -	if (rlim < RLIM_INFINITY && brk - mm->start_data > rlim)
>> +	if (rlim < RLIM_INFINITY && (brk - mm->start_brk) +
>> +			(mm->end_data - mm->start_data) > rlim)
>>  		goto out;
>>  
>>  	newbrk = PAGE_ALIGN(brk);

Parentheses around (brk - mm->start_brk) + (mm->end_data - mm->start_data)
not strictly necessary.
-
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