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parisc: Consider stack randomization for mmap base only when necessary 

Do not offset mmap base address because of stack randomization if
current task does not want randomization.

Signed-off-by: Alexandre Ghiti <alex@ghiti.fr>
Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Alexandre Ghiti 2019-04-04 02:26:22 -04:00 committed by Helge Deller
parent 37624b5854
commit 17d9822d4b
1 changed files with 2 additions and 1 deletions
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3
arch/parisc/kernel/sys_parisc.c
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@ -86,7 +86,8 @@ static unsigned long mmap_upper_limit(struct rlimit *rlim_stack)
stack_base = STACK_SIZE_MAX;
/* Add space for stack randomization. */
stack_base += (STACK_RND_MASK << PAGE_SHIFT);
if (current->flags & PF_RANDOMIZE)
stack_base += (STACK_RND_MASK << PAGE_SHIFT);
return PAGE_ALIGN(STACK_TOP - stack_base);
}